TCN75AVUA713-VAO [MICROCHIP]
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| 型号： | TCN75AVUA713-VAO |
| 厂家： | 
MICROCHIP |
| 描述： | 暂无描述 传感器 温度传感器 |
| 文件： | 总32页 (文件大小：1046K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TCN75A
2-Wire Serial Temperature Sensor
Features:
Description:
• Temperature-to-Digital Converter
• Accuracy:
Microchip Technology Inc.’s TCN75A digital tempera-
ture sensor converts temperatures between -40°C and
+125°C to a digital word, with ±1°C (typ.) accuracy.
- ±1 (typ.) from -40°C to +125°C
- ±2°C (max.) from +40°C to +125°C
• User-selectable Resolution: 0.5°C to 0.0625°C
• Operating Voltage Range: 2.7V to 5.5V
• 2-wire Interface: I2C™ Compatible
• Operating Current: 200 μA (typ.)
• Shutdown Current: 2 μA (max.)
The TCN75A product comes with user-programmable
registers that provide flexibility for temperature-sensing
applications. The register settings allow user-select-
able, 0.5°C to 0.0625°C temperature measurement
resolution, configuration of the power-saving Shutdown
and One-shot (single conversion on command while in
Shutdown) modes and the specification of both
temperature alert output and hysteresis limits. When
the temperature changes beyond the specified limits,
the TCN75A outputs an alert signal. The user has the
option of setting the alert output signal polarity as an
active-low or active-high comparator output for thermo-
stat operation, or as temperature event interrupt output
for microprocessor-based systems.
• Power-saving One-shot Temperature
Measurement
• Available Packages: MSOP-8, SOIC-8
Typical Applications:
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
This sensor has an industry standard 2-wire, I2C™
compatible serial interface, allowing up to eight devices
to be controlled in a single serial bus. These features
make the TCN75A ideal for low-cost, sophisticated
multi-zone temperature-monitoring applications.
• Office Equipment
• Data Communication Equipment
• General Purpose Temperature Monitoring
Package Types
Typical Application
8-Pin SOIC, MSOP
VDD
SDA
SCL
1
2
3
4
VDD
A0
8
7
6
5
PIC®
Microcontroller
RPULL-UP
R
ALERT
GND
A1
VDD
SDA
A2
VDD
A0
SDA
1
2
3
4
8
7
SCL
SCL
I/O Ports
ALERT
ALERT
GND
A1 6
A2
5
TCN75A
© 2006 Microchip Technology Inc.
DS21935C-page 1
TCN75A
†Notice: Stresses above those listed under “Maximum
ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VDD....................................................................... 6.0V
Voltage at all Input/Output pins .... GND – 0.3V to 5.5V
Storage temperature ..........................-65°C to +150°C
Ambient temp. with power applied .....-55°C to +125°C
Junction Temperature (TJ).................................. 150°C
ESD protection on all pins (HBM:MM)....... (4 kV:400V)
Latch-up current at each pin ......................... ±200 mA
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, and
TA = -40°C to +125°C.
Parameters
Power Supply
Sym
Min
Typ
Max
Unit
Conditions
Operating Voltage Range
Operating Current
VDD
IDD
2.7
—
—
200
0.1
5.5
500
2
V
μA
μA
Continuous operation
Shutdown mode
Shutdown Current
ISHDN
—
Power-On Reset (POR) Threshold
Power Supply Rejection
VPOR
—
—
1.7
0.2
—
—
V
VDD falling edge
Δ°C/ΔVDD
°C/V VDD = 2.7V to 5.5V
Temperature Sensor Accuracy
TA = -40°C to +125°C
Internal ΣΔ ADC
TACY
-2
±1
+2
°C
VDD = 3.3V
Conversion Time:
0.5°C Resolution
tCONV
tCONV
tCONV
tCONV
—
—
—
—
30
60
—
—
—
—
ms
ms
ms
ms
33 samples/sec (typ.)
17 samples/sec (typ.)
8 samples/sec (typ.)
4 samples/sec (typ.)
0.25°C Resolution
0.125°C Resolution
0.0625°C Resolution
Alert Output (Open-drain)
High-level Current
120
240
IOH
—
—
—
—
1
μA
VOH = 5V
IOL= 3 mA
Low-level Voltage
VOL
0.4
V
Thermal Response
Response Time
tRES
—
1.4
—
s
Time to 63% (89°C)
27°C (air) to 125°C (oil
bath)
DS21935C-page 2
© 2006 Microchip Technology Inc.
TCN75A
DIGITAL INPUT/OUTPUT PIN CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground and
TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Serial Input/Output (SCL, SDA, A0, A1, A2)
Input
High-level Voltage
Low-level Voltage
Input Current
VIH
VIL
IIN
0.7 VDD
—
—
—
—
0.3 VDD
+1
V
V
—
-1
μA
Output (SDA)
Low-level Voltage
High-level Current
Low-level Current
VOL
IOH
IOL
—
—
6
—
—
—
10
0.4
1
V
IOL= 3 mA
μA VOH = 5V
mA VOL = 0.6V
pF
—
—
Capacitance
CIN
—
SDA and SCL Inputs
Hysteresis
VHYST 0.05 VDD
—
—
V
Graphical Symbol Description
INPUT
OUTPUT
Voltage
Voltage
VDD
VDD
VIH
VOL
VIL
time
time
time
Current
Current
IOL
IIN
IOH
time
TEMPERATURE CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +2.7V to +5.5V and GND = Ground.
Parameters
Temperature Ranges
Sym
Min
Typ
Max
Units
Conditions
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
Thermal Resistance, 8L-SOIC
Thermal Resistance, 8L-MSOP
TA
TA
TA
-40
-40
-65
—
—
—
+125
+125
+150
°C
°C
°C
Note 1
θJA
θJA
—
—
163
206
—
—
°C/W
°C/W
Note 1: Operation in this range must not cause TJ to exceed Maximum Junction Temperature (+150°C).
© 2006 Microchip Technology Inc.
DS21935C-page 3
TCN75A
SERIAL INTERFACE TIMING SPECIFICATIONS (NOTE 1)
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, TA = -40°C to +125°C,
CL = 80 pF and all limits measured to 50% point.
Parameters
Sym
Min
Typ
Max
Units
Conditions
2-Wire I2C™ Compatible Interface
Serial Port Frequency
Clock Period
fSC
tSC
0
—
—
—
—
—
—
—
—
—
—
—
—
400
—
kHz
μs
μs
μs
ns
ns
μs
μs
μs
μs
μs
μs
2.5
1.3
0.6
20
Low Clock
tLOW
—
High Clock
tHIGH
tR
—
Rise Time
300
300
—
10% to 90% of VDD (SCL, SDA)
90% to 10% of VDD (SCL, SDA)
Fall Time
tF
20
Data Setup Before SCL High
Data Hold After SCL Low
Start Condition Setup Time
Start Condition Hold Time
Stop Condition Setup Time
Bus Idle
tSU-DATA
tH-DATA
tSU-START
tH-START
tSU-STOP
tB-FREE
0.1
0
—
0.6
0.6
0.6
1.3
—
—
—
—
Note 1: Specification limits are characterized but not product tested.
Timing Diagram
Start Condition
Data Transmission
Stop Condition
DS21935C-page 4
© 2006 Microchip Technology Inc.
TCN75A
2.0
TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise noted: VDD = 2.7V to 5.5V.
3.0
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
TA = +25°C
DD = 3.3V
VDD = 3.3V
5 lots
32 Samples/lot
160 Devices
V
2.0
0.0625°C Resolution
1.0
0.0
Specification
Limits
160 Devices
-1.0
-2.0
-3.0
-55 -35 -15
5
25 45 65 85 105 125
TA (°C)
Temperature Accuracy (°C)
FIGURE 2-1:
Average Temperature
FIGURE 2-4:
Temperature Accuracy
Accuracy vs. Ambient Temperature, V = 3.3V.
Histogram, T = +25°C.
DD
A
400
3.0
0.0625°C Resolution
160 Devices
VDD = 2.7V
VDD = 3.3V
VDD = 2.7V
VDD = 3.3V
VDD = 5.0V
VDD = 5.5V
350
300
250
200
150
100
50
2.0
1.0
VDD = 5.0V
VDD = 5.5V
0.0
-1.0
-2.0
-3.0
-55 -35 -15
5
25 45 65 85 105 125
-55 -35 -15
5
25 45 65 85 105 125
TA (°C)
T
A (°C)
FIGURE 2-2:
Average Temperature
FIGURE 2-5:
Supply Current vs. Ambient
Accuracy vs. Ambient Temperature.
Temperature.
3.0
1
0.8
0.6
0.4
0.2
0
Resolution
VDD = 3.3V
160 Devices
2.0
0.125°C
0.0625°C
1.0
0.0
-1.0
0.5°C
0.25°C
-2.0
-3.0
-55 -35 -15
5
25 45 65 85 105 125
-55 -35 -15
5
25 45 65 85 105 125
TA (°C )
T
A (°C)
FIGURE 2-3:
Average Temperature
FIGURE 2-6:
Shutdown Current vs.
Accuracy vs. Ambient Temperature, V = 3.3V.
Ambient Temperature.
DD
© 2006 Microchip Technology Inc.
DS21935C-page 5
TCN75A
Note: Unless otherwise noted: VDD = 2.7V to 5.5V.
145
125
105
85
48
Average of 10 samples per package
VOL = 0.6V
42
VDD = 5.5V
V
DD = 3.3V
36
30
24
18
12
6
VDD = 2.7V
65
SOIC
45
MSOP
25
27°C (Air) to 125°C (Oil bath)
5
-55 -35 -15
5
25 45 65 85 105 125
TA (°C)
-2
0
2
4
6
8
10 12 14 16 18 20
Time (s)
FIGURE 2-7:
ALERT and SDA I vs.
FIGURE 2-9:
TCN75A Thermal Response
OL
Ambient Temperature.
vs. Time.
0.4
IOL = 3 mA
0.3
0.2
0.1
0
VDD = 5.5V
V
V
DD = 3.3V
DD = 2.7V
-55 -35 -15
5
25 45 65 85 105 125
TA (°C)
FIGURE 2-8:
ALERT and SDA Output
V
vs. Ambient Temperature.
OL
DS21935C-page 6
© 2006 Microchip Technology Inc.
TCN75A
3.0
PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
MSOP, SOIC
PIN FUNCTION TABLE
Symbol
Function
1
2
3
4
5
6
7
8
SDA
SCL
ALERT
GND
A2
Bidirectional Serial Data
Serial Clock Input
Temperature Alert Output
Ground
Address Select Pin (bit 2)
Address Select Pin (bit 1)
Address Select Pin (bit 0)
Power Supply Input
A1
A0
VDD
3.1
Serial Data Pin (SDA)
3.5
ALERT Output
SDA is a bidirectional input/output pin, used to serially
transmit data to and from the host controller. This pin
requires a pull-up resistor to output data.
The TCN75A’s ALERT pin is an open-drain output. The
device outputs an alert signal when the ambient
temperature goes beyond the user-programmed
temperature limit.
3.2
Serial Clock Pin (SCL)
3.6
Address Pins (A2, A1, A0)
SCL is a clock input pin. All communication and timing
is relative to the signal on this pin. The clock is
generated by the host controller on the bus.
A2, A1 and A0 are device or slave address input pins.
The address pins are the Least Significant bits (LSb) of
the device address bits. The Most Significant bits
(MSb) (A6, A5, A4, A3) are factory-set to <1001>. This
is illustrated in Table 3-2.
3.3
Power Supply Input (VDD)
VDD is the power pin. The operating voltage, as
specified in the DC electrical specification table, is
applied on this pin.
TABLE 3-2:
Device
SLAVE ADDRESS
A6 A5 A4 A3 A2 A1 A0
TCN75A
1
0
0
1
X
X
X
3.4
Ground (GND)
Note:
User-selectable address is shown by X.
GND is the system ground pin.
© 2006 Microchip Technology Inc.
DS21935C-page 7
TCN75A
4.1.1
DATA TRANSFER
4.0
4.1
SERIAL COMMUNICATION
Data transfers are initiated by a Start condition
(START), followed by a 7-bit device address and a
read/write bit. An Acknowledge (ACK) from the slave
confirms the reception of each byte. Each access must
be terminated by a Stop condition (STOP).
2-Wire SMBus/Standard Mode
I2C™ Protocol-Compatible
Interface
The TCN75A serial clock input (SCL) and the
bidirectional serial data line (SDA) form a 2-wire
bidirectional SMBus/Standard mode I2C compatible
communication port (refer to the Digital Input/output
Pin Characteristics Table and Serial Interface Tim-
ing Specifications (Note 1) Table).
Repeated communication is initiated after tB-FREE
.
This device does not support sequential register read/
write. Each register needs to be addressed using the
Register Pointer.
This device supports the Receive Protocol. The
register can be specified using the pointer for the initial
read. Each repeated read or receive begins with a Start
condition and address byte. The TCN75A retains the
previously selected register. Therefore, it outputs data
from the previously-specified register (repeated pointer
specification is not necessary).
The following bus protocol has been defined:
TABLE 4-1:
TCN75A SERIAL BUS
PROTOCOL DESCRIPTIONS
Term
Description
Master
The device that controls the serial bus,
typically a microcontroller.
4.1.2
MASTER/SLAVE
The bus is controlled by a master device (typically a
microcontroller) that controls the bus access and
generates the Start and Stop conditions. The TCN75A
is a slave device and does not control other devices in
the bus. Both master and slave devices can operate as
either transmitter or receiver. However, the master
device determines which mode is activated.
Slave
The device addressed by the master,
such as the TCN75A.
Transmitter Device sending data to the bus.
Receiver
START
Device receiving data from the bus.
A unique signal from master to initiate
serial interface with a slave.
4.1.3
START/STOP CONDITION
STOP
A unique signal from the master to
terminate serial interface from a slave.
A high-to-low transition of the SDA line (while SCL is
high) is the Start condition. All data transfers must be
preceded by a Start condition from the master. If a Start
condition is generated during data transfer, the
TCN75A resets and accepts the new Start condition.
Read/Write A read or write to the TCN75A
registers.
ACK
A receiver Acknowledges (ACK) the
reception of each byte by polling the
bus.
A low-to-high transition of the SDA line (while SCL is
high) signifies a Stop condition. If a Stop condition is
introduced during data transmission, the TCN75A
releases the bus. All data transfers are ended by a Stop
condition from the master.
NAK
A receiver Not-Acknowledges (NAK) or
releases the bus to show End-of-Data
(EOD).
Busy
Communication is not possible
because the bus is in use.
4.1.4
ADDRESS BYTE
Not Busy
The bus is in the idle state, both SDA
and SCL remain high.
Following the Start condition, the host must transmit an
8-bit address byte to the TCN75A. The address for the
TCN75A Temperature Sensor is ‘1001,A2,A1,A0’ in
binary, where the A2, A1 and A0 bits are set externally
by connecting the corresponding pins to VDD ‘1’ or
GND ‘0’. The 7-bit address transmitted in the serial bit
stream must match the selected address for the
TCN75A to respond with an ACK. Bit 8 in the address
byte is a read/write bit. Setting this bit to ‘1’ commands
a read operation, while ‘0’ commands a write operation
(see Figure 4-1).
Data Valid SDA must remain stable before SCL
becomes high in order for a data bit to
be considered valid. During normal
data transfers, SDA only changes state
while SCL is low.
DS21935C-page 8
© 2006 Microchip Technology Inc.
TCN75A
4.1.6
ACKNOWLEDGE (ACK)
Address Byte
Each receiving device, when addressed, is obliged to
generate an ACK bit after the reception of each byte.
The master device must generate an extra clock pulse
for ACK to be recognized.
SCL
SDA
1
1
2
0
3
0
4
1
5
6
7
8
9
A
C
K
A2 A1 A0
The acknowledging device pulls down the SDA line for
tSU-DATA before the low-to-high transition of SCL from
the master. SDA also needs to remain pulled down for
tH-DATA after a high-to-low transition of SCL.
Start
Slave
Address
Code
R/W
Address
TCN75A Response
During read, the master must signal an End-of-Data
(EOD) to the slave by not generating an ACK bit (NAK)
once the last bit has been clocked out of the slave. In
this case, the slave will leave the data line released to
enable the master to generate the Stop condition.
FIGURE 4-1:
Device Addressing.
4.1.5 DATA VALID
After the Start condition, each bit of data in
transmission needs to be settled for a time specified by
tSU-DATA before SCL toggles from low-to-high (see
“Sensor And EEPROM Serial Interface Timing
Specifications” on Page 4).
© 2006 Microchip Technology Inc.
DS21935C-page 9
TCN75A
5.1
Temperature Sensor
5.0
FUNCTIONAL DESCRIPTION
The TCN75A uses the difference in the base-emitter
voltage of a transistor while its collector current is
changed from IC1 to IC2. With this method, the ΔVBE
depends only on the ratio of the two currents and the
ambient temperature, as shown in Equation 5-1.
The TCN75A temperature sensor consists of a band-
gap type temperature sensor, a ΣΔ Analog-to-Digital
Converter (ADC), user-programmable registers and a
2-wire I2C protocol-compatible serial interface.
EQUATION 5-1:
Resolution
One-Shot
kT
q
⎛
⎝
⎞
⎠
-----
ΔVBE
=
× ln(IC1 ⁄ IC2)
Shutdown
0.5°C
Where:
0.25°C
0.125°C
0.0625°C
Fault Queue
T = temperature in kelvin
Alert Polarity
ΔVBE = change in diode base-emitter
voltage
Alert Comp/Int
k = Boltzmann's constant
q = electron charge
Configuration
Register
ΣΔ ADC
IC1 and IC2 = currents with n:1 ratio
Temperature
Register
THYST
5.2
ΣΔ Analog-to-Digital Converter
Band-Gap
Register
Temperature
A Sigma-Delta ADC is used to convert ΔVBE to a digital
word that corresponds to the transistor temperature.
The converter has an adjustable resolution from 0.5°C
(at 30 ms conversion time) to 0.0625°C (at 240 ms
conversion time). Thus, it allows the user to make trade-
offs between resolution and conversion time. Refer to
Section 5.3.2 “Sensor Configuration Register
(CONFIG)” and Section 5.3.4.7 “ΣΔ ADC Resolution”
for details.
Sensor
TSET
Register
Register
Pointer
I2C™
Interface
FIGURE 5-1:
Functional Block Diagram.
DS21935C-page 10
© 2006 Microchip Technology Inc.
TCN75A
5.3
Registers
Resolution
One-Shot
The TCN75A has four registers that are user-accessi-
ble. These registers are specified as the Ambient
Temperature (TA) register, the Temperature Limit-set
Shutdown
(TSET) register, the Temperature Hysteresis (THYST
)
register and device Configuration (CONFIG) register.
Fault Queue
Alert Polarity
Alert Comp/Int
The Ambient Temperature register is a read-only
register and is used to access the ambient temperature
data. The data from the ADC is loaded in parallel in the
register. The Temperature Limit-set and Temperature
Hysteresis registers are read/write registers that
provide user-programmable temperature limits. If the
ambient temperature drifts beyond the programmed
limits, the TCN75A outputs an alert signal using the
ALERT pin (refer to Section 5.3.4.3 “ALERT Output
Configuration”). The device Configuration register
provides access for the user to configure the TCN75A’s
various features. These registers are described in
further detail in the following sections.
Configuration
Register
ALERT
Output
Temperature
Register
THYST
Register
ALERT Output
Control Logic
TSET
Register
The registers are accessed by sending register
pointers to the TCN75A using the serial interface. This
is an 8-bit pointer. However, the two Least Significant
bits (LSbs) are used as pointers and all other bits need
to be cleared <0>. This device has additional registers
that are reserved for test and calibration. If these
registers are accessed, the device may not perform
according to the specification. The pointer description
is shown below.
FIGURE 4-2:
Register Block Diagram.
REGISTER 5-1:
REGISTER POINTER
U-0
U-0
U-0
0
U-0
0
U-0
0
U-0
R/W-0
P1
R/W-0
P0
0
0
0
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-3
bit 2-0
Unimplemented: Read as ‘0’
Pointer bits
00= Temperature register (TA)
01= Configuration register (CONFIG)
10= Temperature Hysteresis register (THYST
11= Temperature Limit-set register (TSET
)
)
.
© 2006 Microchip Technology Inc.
DS21935C-page 11
TCN75A
TABLE 5-1:
BIT ASSIGNMENT SUMMARY FOR ALL REGISTERS
Register
Pointer
P1 P0
Bit Assignment
MSB/
LSB
7
6
5
4
3
2
1
0
Ambient Temperature Register (TA)
0 0
MSB
LSB
Sign
2-1°C
26°C
2-2°C
25°C
2-3°C
24°C
2-4°C
23°C
0
22°C
0
21°C
0
20°C
0
Sensor Configuration Register (CONFIG)
0 1 LSB One-Shot
Resolution
Fault Queue
ALERT
Polarity
COMP/INT Shutdown
Temperature Hysteresis Register (THYST
)
1 0
MSB
LSB
Sign
2-1°C
26°C
25°C
0
24°C
0
23°C
0
22°C
0
21°C
0
20°C
0
0
Temperature Limit-Set Register (TSET
)
1 1
MSB
LSB
Sign
2-1°C
26°C
25°C
0
24°C
0
23°C
0
22°C
0
21°C
0
20°C
0
0
DS21935C-page 12
© 2006 Microchip Technology Inc.
TCN75A
conversion in the background. The decimal code to
ambient temperature conversion is shown in
Equation 5-2:
5.3.1
AMBIENT TEMPERATURE
REGISTER (T )
A
The TCN75A has
a 16-bit read-only Ambient
Temperature register that contains 9-bit to 12-bit
temperature data. (0.5°C to 0.0625°C resolutions,
respecively). This data is formatted in two’s
complement. The bit assignments, as well as the
corresponding resolution, is shown in the register
assignment below.
EQUATION 5-2:
TA = Code × 2–4
Where:
TA = Ambient Temperature (°C)
Code = TCN75A output in decimal
The refresh rate of this register depends on the
selected ADC resolution. It takes 30 ms (typ.) for 9-bit
data and 240 ms (typ.) for 12-bit data. Since this
register is double-buffered, the user can read the
register while the TCN75A performs Analog-to-Digital
REGISTER 5-2:
AMBIENT TEMPERATURE REGISTER (T ) - ADDRESS <0000 0000>b
A
Upper Half:
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
Sign
26 °C
25 °C
24 °C
23 °C
22 °C
21 °C
20 °C
bit 15
bit 8
Lower Half:
R-0
2-1 °C/bit
R-0
2-2 °C
R-0
2-3 °C
R-0
2-4 °C
R-0
0
R-0
0
R-0
0
R-0
0
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
Note 1: When the 0.5°C, 0.25°C or 0.125°C resolutions are selected, bit 6, bit 7 or bit 8 will remain clear <0>,
respectively.
© 2006 Microchip Technology Inc.
DS21935C-page 13
TCN75A
1
2
3
0
4
1
5
6
7
8
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
Note:
It is not necessary to
select the register
pointer if it was set from
the previous read/write.
(see Section 4.1.1)
SCL
SDA
A
C
K
A
C
K
A
2
A
1
A
0
S
1
0
W
Address Byte
TA Pointer
TCN75A
TCN75A
1
1
2
0
3
0
4
1
5
6
7
8
1
0
2
0
3
0
4
1
5
1
6
7
0
8
1
1
0
2
1
3
4
0
5
0
6
0
7
0
8
0
SCL
A
C
K
A
C
K
N
A
K
A
2
A
1
A
0
S
R
0
0
P
SDA
Address Byte
LSB Data
MSB Data
Master
Master
TCN75A
FIGURE 5-2:
Timing Diagram for Reading +25.25°C Temperature from the T Register (See
A
Section 4.0 “Serial Communication”).
DS21935C-page 14
© 2006 Microchip Technology Inc.
TCN75A
5.3.2
SENSOR CONFIGURATION
REGISTER (CONFIG)
The TCN75A has an 8-bit read/write Configuration
register that allows the user to select the different
features. These features include shutdown, ALERT
output select as comparator or interrupt output, ALERT
output polarity, fault queue cycle, temperature
measurement resolution and One-shot mode (single
conversion while in shutdown). These functions are
described in detail in the following sections.
REGISTER 5-3:
CONFIGURATION REGISTER (CONFIG) - ADDRESS <0000 0001>b
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
COMP/INT
R/W-0
One-Shot
Resolution
Fault Queue
ALERT
Polarity
Shutdown
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7
ONE-SHOT bit
1= Enabled
0= Disabled (Power-up default)
bit 5-6
ΣΔ ADC RESOLUTION bits
00= 9 bit or 0.5°C (Power-up default)
01= 10 bit or 0.25°C
10= 11 bit or 0.125°C
11= 12 bit or 0.0625°C
bit 3-4
FAULT QUEUE bits
00= 1 (Power-up default)
01= 2
10= 4
11= 6
bit 2
bit 1
bit 0
ALERT POLARITY bit
1= Active-high
0= Active-low (Power-up default)
COMP/INT bit
1= Interrupt mode
0= Comparator mode (Power-up default)
SHUTDOWN bit
1= Enable
0= Disable (Power-up default)
© 2006 Microchip Technology Inc.
DS21935C-page 15
TCN75A
• Writing to the CONFIG Register to change the resolution to 0.0625°C <0110 0000>b.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SCL
SDA
A
C
K
A
C
K
A
2
A
1
A
0
S
1
0
0
1
W
0
0
0
0
0
0
0
1
Address Byte
CONFIG Pointer
TCN75A
TCN75A
1
0
2
3
1
4
0
5
0
6
0
7
0
8
0
1
A
C
K
1
P
MSB Data
TCN75A
• Reading the CONFIG Register.
1
2
3
4
5
6
7
8
1
0
2
0
3
0
4
0
5
6
0
7
0
8
1
Note:
It is not necessary to
select the register
pointer if it was set from
the previous read/write
(see Section 4.1.1).
SCL
SDA
A
A
C
K
A
2
A
1
A
0
C
S
1
0
0
1
0
W
K
Address Byte
CONFIG Pointer
TCN75A
TCN75A
1
1
2
0
3
0
4
1
5
6
7
8
1
0
2
1
3
1
4
0
5
0
6
7
8
SCL
A
C
K
N
A
K
A
2
A
1
A
0
S
R
0
0
0
P
SDA
Address Byte
Data
TCN75A
FIGURE 5-3:
Timing Diagram for Writing and Reading from the Configuration Register (See
Section 4.0 “Serial Communication”).
DS21935C-page 16
© 2006 Microchip Technology Inc.
TCN75A
5.3.3
TEMPERATURE HYSTERESIS
REGISTER (T
)
HYST
The TCN75A has a 16-bit read/write Temperature
Hysteresis register that contains a 9-bit data in two’s
compliment format. This register is used to set a
hysteresis for the TSET limit. Therefore, the data
represents a minimum temperature limit. If the ambient
temperature drifts below the specified limit, the
TCN75A asserts an alert output (refer to
Section 5.3.4.3 “ALERT Output Configuration”).
This register uses the nine Most Significant bits (MSbs)
and all other bits are don’t cares.
The power-up default value of THYST register is 75°C,
or <0100 1011 0>bin binary.
REGISTER 5-4:
TEMPERATURE HYSTERESIS REGISTER (T
) - ADDRESS <0000 0010>b
HYST
Upper Half:
R/W-0
R/W-1
26 °C
R/W-0
25 °C
R/W-0
24 °C
R/W-1
23 °C
R/W-0
22 °C
R/W-1
21 °C
R/W-1
20 °C
Sign
bit 15
bit 8
Lower Half:
R/W-0
R-0
0
R-0
0
R-0
0
R-0
0
R-0
0
R-0
0
R-0
0
2
-1 °C
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
© 2006 Microchip Technology Inc.
DS21935C-page 17
TCN75A
• Writing to the THYST Register to set the temperature hysteresis to 95°C <0101 1111 0000 0000>b.
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SCL
SDA
A
C
K
A
C
K
A
2
A
1
A
0
S
1
0
0
1
W
0
0
0
0
0
0
1
0
Address Byte
THYST Pointer
TCN75A
TCN75A
1
0
2
3
0
4
1
5
1
6
1
7
1
8
1
1
0
2
3
0
4
0
5
0
6
0
7
0
8
0
A
C
K
A
C
K
1
P
0
MSB Data
LSB Data
TCN75A
TCN75A
• Reading the THYST Register.
1
2
3
4
5
6
7
8
1
0
2
0
3
0
4
0
5
6
0
7
1
8
0
Note:
It is not necessary to
select the register
pointer if it was set from
the previous read/write
(see Section 4.1.1).
SCL
SDA
A
A
A
2
A
1
A
0
C
C
S
1
0
0
1
0
W
K
K
Address Byte
THYST Pointer
TCN75A
TCN75A
1
1
2
0
3
0
4
1
5
6
7
8
1
0
2
1
3
0
4
1
5
1
6
7
8
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
SCL
A
C
K
A
C
K
N
A
K
A
2
A
1
A
0
S
R
1
1
1
P
SDA
Address Byte
LSB Data
MSB Data
Master
Master
TCN75A
FIGURE 5-4:
Timing Diagram for Writing and Reading from the Temperature Hysteresis Register
(See Section 4.0 “Serial Communication”).
DS21935C-page 18
© 2006 Microchip Technology Inc.
TCN75A
5.3.4
TEMPERATURE LIMIT-SET
REGISTER (T
)
SET
The TCN75A has a 16-bit read/write Temperature
Limit-Set register (TSET) which contains a 9-bit data in
two’s compliment format. This data represents a maxi-
mum temperature limit. If the ambient temperature
exceeds this specified limit, the TCN75A asserts an
alert output. (Refer to Section 5.3.4.3 “ALERT Output
Configuration”).
This register uses the nine Most Significant bits (MSbs)
and all other bits are “don’t cares”.
The power-up default value of the TSET register is
80°C, or <0101 0000 0>b in binary.
REGISTER 5-5:
TEMPERATURE LIMIT-SET REGISTER (T
) - ADDRESS <0000 0011>b
SET
Upper Half:
R/W-0
R/W-1
26 °C
R/W-0
25 °C
R/W-1
24 °C
R/W-0
23 °C
R/W-0
22 °C
R/W-0
21 °C
R/W-0
20 °C
Sign
bit 15
bit 8
Lower Half:
R/W-0
R-0
0
R-0
0
R-0
0
R-0
0
R-0
0
R-0
0
R-0
0
2-1 °C
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
© 2006 Microchip Technology Inc.
DS21935C-page 19
TCN75A
• Writing to the TSET Register to set the temperature limit to 90°C, <0101 1010 0000 0000>b
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SCL
SDA
A
C
K
A
C
K
A
2
A
1
A
0
S
1
0
0
1
W
0
0
0
0
0
0
1
1
Address Byte
TSET Pointer
TCN75A
TCN75A
1
0
2
3
0
4
1
5
1
6
0
7
1
8
0
1
0
2
3
0
4
0
5
0
6
0
7
0
8
0
A
C
K
A
C
K
1
P
0
MSB Data
LSB Data
TCN75A
TCN75A
• Reading the TSET Register.
1
2
3
4
5
6
7
8
1
0
2
0
3
0
4
0
5
6
0
7
1
8
1
Note:
It is not necessary to
select the register
pointer if it was set from
the previous read/write.
(see Section 4.1.1)
SCL
SDA
A
A
A
2
A
1
A
0
C
C
S
1
0
0
1
0
W
K
K
Address Byte
TSET Pointer
TCN75A
TCN75A
1
1
2
0
3
0
4
1
5
6
7
8
1
0
2
1
3
0
4
1
5
1
6
7
8
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
0
SCL
A
C
K
A
C
K
N
A
K
A
2
A
1
A
0
S
R
0
1
0
P
SDA
Address Byte
LSB Data
MSB Data
Master
Master
TCN75A
FIGURE 5-5:
Timing Diagram for Writing and Reading from the Temperature Limit-set Register
(See Section 4.0 “Serial Communication”).
DS21935C-page 20
© 2006 Microchip Technology Inc.
TCN75A
5.3.4.1
Shutdown Mode
5.3.4.3
ALERT Output Configuration
The Shutdown mode disables all power-consuming
activities (including temperature sampling operations)
while leaving the serial interface active. The device
consumes 2 μA (max.) in this mode. It remains in this
mode until the Configuration register is updated to
enable continuous conversion or until power is
recycled.
The ALERT output can be configured as either a
comparator output or as Interrupt Output mode using
bit 1 of CONFIG. The polarity can also be specified as
an active-high or active-low using bit 2 of CONFIG.
The following sections describe each output mode,
while Figure 5-6 gives a graphical description.
5.3.4.4
Comparator Mode
In Shutdown mode, the CONFIG, TA, TSET and THYST
registers can be read or written to; however, the serial
bus activity will increase the shutdown current.
In Comparator mode, the ALERT output is asserted
when TA is greater than TSET. The pin remains active
until TA is lower than THYST. The Comparator mode is
useful for thermostat-type applications, such as turning
on a cooling fan or triggering a system shutdown when
the temperature exceeds a safe operating range.
5.3.4.2
One-Shot Mode
The TCN75A can also be used in a One-shot mode that
can be selected using bit 7 of the CONFIG register. The
One-shot mode performs
a
single temperature
In Comparator mode, if the device enters the Shutdown
mode with asserted ALERT output, the output remains
active during shutdown. The device must be operating
in continuous conversion, with TA below THYST, for the
ALERT output to be deasserted.
measurement and returns to Shutdown mode. This
mode is especially useful for low-power applications
where temperature is measured upon command from a
controller. For example, a 9-bit TA in One-shot mode
consumes 200 μA (typ.) for 30 ms and 0.1 μA (typ.)
during shutdown.
5.3.4.5
Interrupt Mode
In Interrupt mode, the ALERT output is asserted when TA
is greater than TSET. However, the output is deasserted
when the user performs a read from any register. This
mode is designed for interrupt-driven, microcontroller-
based systems. The microcontroller receiving the inter-
rupt will have to acknowledge the interrupt by reading
any register from the TCN75A. This will clear the interrupt
and the ALERT pin will become deasserted. When TA
drifts below THYST, the TCN75A outputs another interrupt
and the controller needs to read a register to deassert the
ALERT output. Shutting down the device will also reset,
or deassert, the ALERT output.
To access this feature, the device needs to initially be
in Shutdown mode. This is done by sending a byte to
the CONFIG register with bit 0 set <1> and bit 7 cleared
<0>. Once the device is in Shutdown mode, the
CONFIG register needs to be written to again, with bit
0 and bit 7 set <1>. This begins the single conversion
cycle of tCONV, 30ms for 9-bit data. Once the
conversion is completed, TA is updated and bit 7 of
CONFIG becomes cleared <0> by the TCN75A.
TABLE 5-6:
SHUTDOWN AND ONE-SHOT
MODE DESCRIPTION
One-Shot Shutdown
Operational Mode
(Bit 7)
(Bit 0)
TSET
Continuous Conversion
Shutdown
0
0
1
0
1
0
TA
THYST
Continuous Conversion
(One-shot is ignored)
One-shot (Note 1)
1
1
ALERT
Comparator mode
Active-low
Note 1: The shutdown command <01> needs to
be programmed before sending a one-
shot command <11>.
ALERT
Interrupt mode
Active-low
Register
Read
*
* See Section 5.3.4.5 “Interrupt Mode”
FIGURE 5-6:
Alert Output.
© 2006 Microchip Technology Inc.
DS21935C-page 21
TCN75A
5.3.4.6
Fault Queue
5.4
Summary of Power-up Condition
The fault queue feature can be used as a filter to lessen
the probability of spurious activation of the ALERT pin.
TA must remain above TSET for the consecutive num-
ber of conversion cycles selected using the Fault
Queue bits. Bit 3 and bit 4 of CONFIG can be used to
select up to six fault queue cycles. For example, if six
fault queues are selected, TA must be greater than
TSET for six consecutive conversions before ALERT is
asserted as a comparator or an interrupt output.
The TCN75A has an internal Power-on Reset (POR)
circuit. If the power supply voltage VDD glitches down
to the 1.7V (typ.) threshold, the device resets the
registers to the power-up default settings.
Table 5-2 shows the power-up default summary.
TABLE 5-2:
Register
POWER-UP DEFAULTS
Data
Power-up Defaults
(Hex)
This queue setting also applies for THYST. If six fault
queues are selected, TA must remain below THYST for
six consecutive conversions before ALERT is deas-
serted (Comparator mode) or before another interrupt
is asserted (Interrupt mode).
TA
0000
A000
9600
00
0°C
80°C
TSET
THYST
Pointer
75°C
Temperature register
5.3.4.7
ΣΔ ADC Resolution
Continuous Conversion
Comparator mode
Active-low Output
Fault Queue 1
The TCN75A provides access to select the ADC
resolution from 9-bit to 12-bit (0.5°C to 0.0625°C
resolution) using bit 6 and bit 5 of the CONFIG register.
The user can gain better insight into the trends and
characteristics of the ambient temperature by using a
finer resolution. Increasing the resolution also reduces
the quantization error. Figure 2-3 shows accuracy
versus resolution.
CONFIG
00
9-bit Resolution
At power-up, the TCN75A has an inherent 2 ms (typ.)
power-up delay before updating the registers with
default values and start a conversion cycle. This delay
reduces register corruption due to unsettled power.
After power-up, it takes tCONV for the TCN75A to
update the TA register with valid temperature data.
Table 5-1 shows the TA register conversion time for the
corresponding resolution.
TABLE 5-1:
RESOLUTION AND
CONVERSION TIME
Bits
Resolution
tCONV (typ.)
9
0.5
0.25
30 ms
60 ms
10
11
12
0.125
0.0625
120 ms
240 ms
DS21935C-page 22
© 2006 Microchip Technology Inc.
TCN75A
The ALERT output can be wire-ORed with a number of
other open-drain devices. In such applications, the
output needs to be programmed as an active-low
output. Most systems will require pull-up resistors for
this configuration.
6.0
6.1
APPLICATIONS INFORMATION
Connecting to the Serial Bus
The SDA and SCL serial interface are open-drain pins
that require pull-up resistors. This configuration is
shown in Figure 6-1.
6.3
Layout Considerations
The TCN75A does not require any additional compo-
nents besides the master controller in order to measure
temperature. However, it is recommended that a
decoupling capacitor of 0.1 μF to 1 μF be used
between the VDD and GND pins. A high-frequency
ceramic capacitor is recommended. It is necessary for
the capacitor to be located as close as possible to the
power pins in order to provide effective noise
protection.
VDD
TCN75A
R
R
SDA
SCL
PIC®
MCU
6.4
Thermal Considerations
FIGURE 6-1:
Interface.
Pull-up Resistors On Serial
The TCN75A measures temperature by monitoring the
voltage of a diode located in the die. A low-impedance
thermal path between the die and the Printed Circuit
Board (PCB) is provided by the pins. Therefore, the
TCN75A effectively monitors the temperature of the
PCB. However, the thermal path for the ambient air is
not as efficient because the plastic device package
functions as a thermal insulator.
The TCN75A is designed to meet 0.4V (max.) voltage
drop at 3 mA of current. This allows the TCN75A to
drive lower values of pull-up resistors and higher bus
capacitance. In this application, all devices on the bus
must meet the same pull-down current requirements.
A potential for self-heating errors can exist if the
TCN75A SDA and SCL communication lines are
heavily loaded with pull-ups. Typically, the self-heating
error is negligible because of the relatively small
current consumption of the TCN75A. However, in order
to maximize the temperature accuracy, the SDA and
SCL pins need to be lightly loaded.
6.2
Typical Application
Microchip provides several microcontroller product
lines with Master Synchronous Serial Port Modules
(MSSP) that include the I2C interface mode. This
module implements all master and slave functions and
simplifies the firmware development overhead.
Figure 6-2 shows a typical application using the
PIC16F737 as a master to control other Microchip
slave products, such as EEPROM, fan speed
controllers and the TCN75A temperature sensor
connected to the bus.
SDA
SCL
PIC16F737
Microcontroller
24LC01
EEPROM
TC654
Fan Speed
Controller
TCN75A
Temperature
Sensor
2
FIGURE 6-2:
Bus.
Multiple Devices on I C™
© 2006 Microchip Technology Inc.
DS21935C-page 23
TCN75A
7.0
7.1
PACKAGING INFORMATION
Package Marking Information
Example:
8-Lead MSOP
N75A/E
645256
XXXXX
YWWNNN
8-Lead SOIC (150 mil)
Example:
TCN75AV
XXXXXXXX
XXXXYYWW
OA^
e
3
0645
NNN
256
Legend: XX...X Customer-specific information
Y
YY
WW
NNN
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
e
3
Pb-free JEDEC designator for Matte Tin (Sn)
*
This package is Pb-free. The Pb-free JEDEC designator (
can be found on the outer packaging for this package.
)
e3
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
DS21935C-page 24
© 2006 Microchip Technology Inc.
TCN75A
8-Lead Plastic Micro Small Outline Package (UA) (MSOP)
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
D
N
E
E1
NOTE 1
2
b
1
e
c
ϕ
A2
A
L1
L
A1
Units
MILLIMETERS
Dimension Limits
NOM
8
MAX
MIN
Number of Pins
Pitch
N
e
0.65 BSC
—
—
Overall Height
A
1.10
0.95
0.15
0.75
0.00
0.85
Molded Package Thickness
Standoff
A2
A1
E
—
4.90 BSC
3.00 BSC
3.00 BSC
0.60
Overall Width
Molded Package Width
Overall Length
Foot Length
E1
D
0.40
L
0.80
0.95 REF
—
Footprint
L1
0°
Foot Angle
ϕ
8°
0.08
0.22
—
Lead Thickness
Lead Width
c
0.23
0.40
—
b
Notes:
1. Pin 1 visual index feature may vary, but must be located within the hatched area.
2. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions
shall not exceed 0.15 mm per side.
3. Dimensioning and tolerancing per ASME Y14.5M
BSC: Basic Dimension. Theoretically exact value shown without tolerances.
REF: Reference Dimension, usually without tolerance, for information purposes only.
Microchip Technology Drawing No. C04–111, Sept. 8, 2006
© 2006 Microchip Technology Inc.
DS21935C-page 25
TCN75A
8-Lead Plastic Small Outline (OA) – Narrow, 150 mil Body (SOIC)
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
E
E1
p
D
2
B
n
1
h
α
45°
c
A2
A
φ
β
L
A1
Units
INCHES*
MILLIMETERS
Dimension Limits
MIN
NOM
8
MAX
MIN
NOM
8
MAX
n
p
Number of Pins
Pitch
.050
1.27
Overall Height
A
.053
.061
.056
.007
.237
.154
.193
.015
.025
4
.069
1.35
1.32
1.55
1.42
0.18
6.02
3.91
4.90
0.38
0.62
4
1.75
Molded Package Thickness
Standoff
A2
A1
E
.052
.004
.228
.146
.189
.010
.019
0
.061
.010
.244
.157
.197
.020
.030
8
1.55
0.25
6.20
3.99
5.00
0.51
0.76
8
§
0.10
5.79
3.71
4.80
0.25
0.48
0
Overall Width
Molded Package Width
Overall Length
E1
D
Chamfer Distance
Foot Length
h
L
φ
Foot Angle
c
Lead Thickness
Lead Width
.008
.013
0
.009
.017
12
.010
.020
15
0.20
0.33
0
0.23
0.42
12
0.25
0.51
15
B
α
β
Mold Draft Angle Top
Mold Draft Angle Bottom
* Controlling Parameter
§ Significant Characteristic
Notes:
0
12
15
0
12
15
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side.
JEDEC Equivalent: MS-012
Drawing No. C04-057
DS21935C-page 26
© 2006 Microchip Technology Inc.
TCN75A
APPENDIX A: REVISION HISTORY
Revision C (November 2006)
• Updated accuracy specification limits
• Numerous edits throughout data sheet
• Updated package outline drawings
• Added disclaimers to package outline drawings
• Updated package marking information for pb-free
markings.
Revision B (May 2006)
• Revised Product ID System; Added OA713 and
UA713 packages.
Revision A (January 2005)
• Original release of this document.
© 2006 Microchip Technology Inc.
DS21935C-page 27
TCN75A
NOTES:
DS21935C-page 28
© 2006 Microchip Technology Inc.
TCN75A
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
Examples:
PART NO.
Device
X
/XX
a)
b)
TCN75AVOA:
TCN75AVOA713:
8LD SOIC package.
Tape and Reel,
8LD SOIC package.
Temperature
Range
Package
Device:
TCN75A: Temperature Sensor
a)
b)
TCN75AVUA:
TCN75AVUA713:
8LD MSOP package.
Tape and Reel,
8LD MSOP package.
° °
= -40 C to +125 C
Temperature
V
Range:
Package:
OA
OA713
=
=
Plastic SOIC, (150 mil Body), 8-lead
Plastic SOIC, (150 mil Body), 8-lead,
Tape & Reel
UA
UA713
=
=
Plastic Micro Small Outline (MSOP), 8-lead
Plastic Micro Small Outline (MSOP), 8-lead
Tape & Reel
© 2006 Microchip Technology Inc.
DS21935C-page 29
TCN75A
NOTES:
DS21935C-page 30
© 2006 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC, and SmartShunt are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
SEEVAL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active
Thermistor, Mindi, MiWi, MPASM, MPLIB, MPLINK, PICkit,
PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,
PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,
rfPICDEM, Select Mode, Smart Serial, SmartTel, Total
Endurance, UNI/O, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2006, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona, Gresham, Oregon and Mountain View, California. The
Company’s quality system processes and procedures are for its PIC®
8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs,
microperipherals, nonvolatile memory and analog products. In addition,
Microchip’s quality system for the design and manufacture of
development systems is ISO 9001:2000 certified.
© 2006 Microchip Technology Inc.
DS21935C-page 31
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Habour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-4182-8400
Fax: 91-80-4182-8422
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
Atlanta
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
Alpharetta, GA
Tel: 770-640-0034
Fax: 770-640-0307
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Korea - Gumi
Tel: 82-54-473-4301
Fax: 82-54-473-4302
Boston
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Korea - Seoul
China - Fuzhou
Tel: 86-591-8750-3506
Fax: 86-591-8750-3521
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Penang
Tel: 60-4-646-8870
Fax: 60-4-646-5086
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
China - Xian
Tel: 86-29-8833-7250
Fax: 86-29-8833-7256
10/19/06
DS21935C-page 32
© 2006 Microchip Technology Inc.
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