PCA9501 [NXP]
8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins; 8位I2C和SMBus I / O端口,中断, 2千位EEPROM和6个地址引脚型号: | PCA9501 |
厂家: | NXP |
描述: | 8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins |
文件: | 总22页 (文件大小:147K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
PCA9501
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
Product data
2003 Sep 12
Supersedes data of 2002 Sep 27
Philips
Semiconductors
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
DESCRIPTION
The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit
EEPROM.
The I/O expandable eight quasi bidirectional data pins can be
independently assigned as inputs or outputs to monitor board level
status or activate indicator devices such as LEDs. The system
master writes to the I/O configuration bits in the same way as for the
PCF8574. The data for each Input or Output is kept in the
corresponding Input or Output register. The system master can read
all registers.
FEATURES
The EEPROM can be used to store error codes or board
manufacturing data for read-back by application software for
diagnostic purposes and are included in the I/O expander package.
• 8 general purpose input/output expander/collector
• Replacement for PCF8574 with integrated 2-kbit EEPROM
• Internal 256 × 8 EEPROM
The PCA9501 Active-LOW open-drain interrupt output is activated
when any input state differes from its corresponding input port
register state. It is used to indicate to the system master that an
input state has changed and the device needs to be interrogated.
• Self timed write cycle (5 ms typ)
• 16 byte page write operation
The PCA9501 has six address pins with internal pull-up resistors
2
• I C and SMBus interface logic
2
allowing up to 64 devices to share the common two wire I C
• Internal power-on reset
software protocol serial data bus. The fixed GPIO address starts
2
with “1” and the fixed EEPROM I C address starts with “0”, so the
• Noise filter on SCL/SDA inputs
PCA9501 appears as two separate devices to the bus master.
• Active low interrupt output
The PCA9501 supports hot insertion to facilitate usage in removable
cards on backplane systems.
2
• 6 address pins allowing up to 64 devices on the I C/SMBus
• No glitch on power-up
• Supports hot insertion
• Power-up with all channels configured as inputs
• Low standby current
• Operating power supply voltage range of 2.5 V to 3.6 V
• 5 V tolerant inputs/outputs
• 0 to 400 kHz clock frequency
• ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
• Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
• Packages offered: SO20, TSSOP20, HVQFN20
ORDERING INFORMATION
PACKAGES
TEMPERATURE RANGE
ORDER CODE
TOPSIDE MARK
DRAWING NUMBER
20-pin plastic SO
-40 to +85 °C
PCA9501D
PCA9501D
SOT163-1
20-Pin Plastic TSSOP
20-Pin Plastic HVQFN
-40 to +85 °C
-40 to +85 °C
PCA9501PW
PCA9501BS
PCA9501
9501
SOT360-1
SOT662-1
Standard packing quantities and other packaging data are available at www.philipslogic.com/packaging.
2
SMBus as specified by the Smart Battery System Implementers Forum is a derivative of the Philips I C patent.
2
I C is a trademark of Philips Semiconductors Corporation.
2
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
PIN CONFIGURATION - SO, TSSOP
PIN CONFIGURATION - HVQFN
A1 A0
V
SDA SCL
DD
A0
A1
V
DD
1
2
3
4
5
6
7
8
20
19
18
SDA
SCL
A2
I/O0
I/O1
I/O2
I/O3
15 WC
1
2
3
4
5
A2
14 I/O7
I/O0
I/O1
I/O2
17 WC
I/O7
16
I/O6
13
PCA9501
I/O6
I/O5
I/O4
15
14
13
I/O5
12
I/O3
INT
A5
I/O4
11
A3
A4
9
12
11
INT A5
V
A4 A3
SS
10
V
SS
TOP VIEW
SW00903
SW02017
Figure 1. Pin configuration - SO, TSSOP
Figure 2. Pin configuration - HVQFN
NAME AND FUNCTION
PIN DESCRIPTION
PIN NUMBER
SYMBOL
SO, TSSOP
HVQFN
1, 2, 3, 9, 11, 12
19, 20, 1, 7, 9, 10
A0-5
I/O0-3
INT
Address lines (internal pull-up)
4, 5, 6, 7
2, 3, 4, 5
Quasi-bidirectional I/O pins
Active low interrupt output (open drain)
Supply ground
8
6
10
8
V
SS
13, 14, 15, 16
11, 12, 13, 14
I/O4-7
WC
Quasi-bidirectional I/O pins
Active low write control pin
17
18
19
20
15
16
17
18
2
SCL
SDA
I C serial clock
2
I C serial data
V
DD
Supply voltage
3
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
BLOCK DIAGRAM
PCA9501
300 k Ω
A0
A1
A2
I/O0
I/O1
I/O2
I/O3
A3
INPUT/
OUTPUT
PORTS
8-BIT
2
A4
A5
I C/SMBus
CONTROL
I/O4
I/O5
WRITE pulse
READ pulse
SCL
SDA
INPUT
FILTER
I/O6
I/O7
V
CC
V
DD
LP
FILTER
INT
V
SS
POWER-ON
RESET
EEPROM
256 x 8
WC
SW01077
Figure 3. Block diagram
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
FUNCTIONAL DESCRIPTION
V
DD
WRITE PULSE
100 µA
DATA FROM
SHIFT REGISTER
D
C
Q
FF
I/O0 TO I/O7
I
S
POWER-ON
RESET
V
SS
D
C
Q
FF
I
READ PULSE
S
TO INTERRUPT LOGIC
DATA TO
SHIFT REGISTER
SW00788
Figure 4. Simplified schematic diagram of each I/O
DEVICE ADDRESSING
Following a START condition the bus master must output the address of the slave it is accessing. The address of the PCA9501 is shown in
Figure 5. Internal pullup resistors are incorporated on the hardware selectable address pins.
SLAVE ADDRESS
SLAVE ADDRESS
0
A5 A4 A3 A2 A1 A0 R/W
1
A5 A4 A3 A2 A1 A0 R/W
FIXED
HARDWARE
PROGRAMMABLE
FIXED
HARDWARE
PROGRAMMABLE
(a) I/O EXPANDER
(b) MEMORY
a.
b.
SW02006
Figure 5. PCA9501 slave addresses
The last bit of the address byte defines the operation to be performed. When set to logic 1 a read is selected while a logic 0 selects a write
operation.
CONTROL REGISTER
2
The PCA9501 contains a single 8-bit register called the Control Register, which can be written and read via the I C bus. This register is sent
after a successful acknowledgment of the slave address.
It contains the I/O operation information.
5
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
I/O OPERATIONS (see also Figure 4)
Each of the PCA9501’s eight I/Os can be independently used as an input or output. Output data is transmitted to the port by the I/O WRITE
mode (see Figure 6). Input I/O data is transferred from the port to the microcontroller by the READ mode (See Figure 7).
SCL
SDA
1
2
3
4
5
6
7
8
SLAVE ADDRESS (I/O EXPANDER)
DATA TO PORT
DATA 2
DATA TO PORT
DATA 1
S
0
A5 A4 A3 A2 A1 A0
0
A
A
A
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
WRITE TO
PORT
DATA OUT
FROM PORT
DATA 1 VALID
DATA 2 VALID
t
t
pv
pv
SW00649
Figure 6. I/O WRITE mode (output)
SLAVE ADDRESS (I/O EXPANDER)
DATA FROM PORT
DATA FROM PORT
DATA 4
SDA
S
0
A5 A4 A3 A2 A1 A0
1
A
DATA 1
A
1
P
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM MASTER
STOP
CONDITION
READ FROM
PORT
DATA INTO
PORT
DATA 1
DATA 2
DATA 3
DATA 4
t
t
ps
ph
INT
t
t
ir
iv
SW00650
Figure 7. I/O READ mode (input)
6
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
Quasi-bidirectional I/Os (see Figure 8)
A quasi-bidirectional I/O can be used as an input or output without the use of a control signal for data direction. At power-on the I/Os are HIGH.
In this mode, only a current source to V is active. An additional strong pull-up to V allows fast rising edges into heavily loaded outputs.
DD
DD
These devices turn on when an output is written HIGH, and are switched off by the negative edge of SCL. The I/Os should be HIGH before
being used as inputs.
SLAVE ADDRESS (I/O EXPANDER)
DATA TO PORT
0
DATA TO PORT
1
SDA
S
0
A
A
A
3
A2 A1 A0
0
A
A
A
P
5
4
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
I/O3
ACKNOWLEDGE
FROM SLAVE
I/O3
SCL
1
2
3
4
5
6
7
8
I/O3
OUTPUT
VOLTAGE
I/O3
PULL-UP
OUTPUT
CURRENT
I
I
OHt
OH
SW00904
Figure 8. Transient pull-up current I
while I/O3 changes from LOW-to-HIGH and back to LOW
OHt
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
Resetting occurs as follows:
Interrupt (see Figs 9 and 12)
The PCA9501 provides an open drain output (INT) which can be fed
to a corresponding input of the microcontroller. This gives these
chips a type of master function which can initiate an action
elsewhere in the system.
• In the READ mode at the acknowledge bit after the rising edge of
the SCL signal
• In the WRITE mode at the acknowledge bit after the
HIGH-to-LOW transition of the SCL signal
An interrupt is generated by any rising or falling edge of the port
• Returning of the port data to its original setting.
inputs in the input mode. After time t the signal INT is valid.
iv
• Interrupts which occur during the acknowledge clock pulse may
be lost (or very short) due to the resetting of the interrupt during
this pulse.
Resetting and reactivating the interrupt circuit is achieved when data
on the port is changed to the original setting or data is read from or
written to the port which has generated the interrupt.
Each change of the I/Os after resetting will be detected and, after
the next rising clock edge, will be transmitted as INT. Reading from
or writing to another device does not affect the interrupt circuit.
PCA9501
(1)
PCA9501
(2)
PCA9501
(16)
V
DD
INT
INT
INT
MICROCONTROLLER
INT
SW00790
Figure 9. Application of multiple PCA9501s with interrupt
SLAVE ADDRESS (I/O EXPANDER)
DATA FROM PORT
SDA
S
0
A5
A4
A3
A2
A1
A0
1
A
1
1
P
START CONDITION
SCL
R/W
8
ACKNOWLEDGE
FROM SLAVE
STOP CONDITION
I/O5
1
2
3
4
5
6
7
DATA INTO I/O5
INT
SW00791
t
t
ir
iv
Figure 10. Interrupt generated by a change of input to I/O5
8
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
the word address and the eight bits after the word address as the
data. The PCA9501 will issue an acknowledge after the receipt of
both the word address and the data. To terminate the data transfer
the master issues the stop condition, initiating the internal write cycle
to the non-volatile memory. Only write and read operations to the
quasi-bidirectional I/Os are allowed during the internal write cycle.
MEMORY OPERATIONS
Write operations
Write operations require an additional address field to indicate the
memory address location to be written. The address field is eight
bits long providing access to any one of the 256 words of memory.
There are two types of write operations, byte write and page write.
Page Write (see Figure 12)
Write operation is possible when WC control pin put at a low logic
level (0). When this control signal is set at 1, write operation is not
possible and data in the memory is protected.
A page write is initiated in the same way as the byte write, if after
sending the first word of data, the stop condition is not received the
PCA9501 considers subsequent words as data. After each data
word the PCA9501 responds with an acknowledge and the four
least significant bits of the memory address field are incremented.
Should the master not send a stop condition after 16 data words the
address counter will return to its initial value and overwrite the data
previously written. After the receipt of the stop condition the inputs
will behave as with the byte write during the internal write cycle.
Byte Write and Page Write explained below assume that Write
Control pin (WC) is set to 0.
Byte Write (see Figure 11)
To perform a byte write the start condition is followed by the memory
slave address and the R/W bit set to 0. The PCA9501 will respond
with an acknowledge and then consider the next eight bits sent as
SLAVE ADDRESS (MEMORY)
WORD ADDRESS
DATA
SDA
S
1
A5 A4 A3 A2 A1 A0
0
A
A
A
P
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
STOP CONDITION.
WRITE TO THE
MEMORY IS
PERFORMED
SW00651
Figure 11. Byte write
SLAVE ADDRESS (MEMORY)
DATA TO MEMORY
DATA n
DATA TO MEMORY
WORD ADDRESS
DATA n + 3
SDA
S
1
A5 A4 A3 A2 A1 A0
0
A
A
A
A
P
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
STOP CONDITION.
WRITE TO THE MEMORY
IS PERFORMED
SW00652
Figure 12. Page Write
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
The master must perform a byte write to the address location to be
read, but instead of transmitting the data after receiving the
acknowledge from the PCA9501 the master reissues the start
condition and memory slave address with the R/W bit set to one.
The PCA9501 will then transmit an acknowledge and use the next
eight clock cycles to transmit the data contained in the addressed
location. The master ceases the transmission by issuing the stop
condition after the eighth bit, omitting the ninth clock cycle
acknowledge.
Read operations
PCA9501 read operations are initiated in an identical manner to
write operations with the exception that the memory slave address’
R/W bit is set to a one. There are three types of read operations;
current address, random and sequential.
Current Address Read (see Figure 13)
The PCA9501 contains an internal address counter that increments
after each read or write access, as a result if the last word accessed
was at address n then the address counter contains the address
n+1.
Sequential Read (see Figure 15)
The PCA9501 sequential read is an extension of either the current
address read or random read. If the master doesn’t issue a stop
condition after it has received the eighth data bit, but instead issues
an acknowledge, the PCA9501 will increment the address counter
and use the next eight cycles to transmit the data from that location.
The master can continue this process to read the contents of the
entire memory. Upon reaching address 255 the counter will return to
address 0 and continue transmitting data until a stop condition is
received. The master ceases the transmission by issuing the stop
condition after the eighth bit, omitting the ninth clock cycle
acknowledge.
When the PCA9501 receives its memory slave address with the
R/W bit set to one it issues an acknowledge and uses the next eight
clocks to transmit the data contained at the address stored in the
address counter. The master ceases the transmission by issuing the
stop condition after the eighth bit. There is no ninth clock cycle for
the acknowledge.
Random Read (see Figure 14)
The PCA9501’s random read mode allows the address to be read
from to be specified by the master. This is done by performing a
dummy write to set the address counter to the location to be read.
SLAVE ADDRESS (MEMORY)
DATA FROM MEMORY
SDA
S
1
A5 A4 A3 A2 A1 A0
1
A
P
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
STOP
CONDITION
SW00653
Figure 13. Current Address Read
SLAVE ADDRESS (MEMORY)
SLAVE ADDRESS (MEMORY)
WORD ADDRESS
DATA FROM MEMORY
SDA
P
S
1
A5 A4 A3 A2 A1 A0
A
A
S
1
A5 A4 A3 A2 A1 A0
A
0
1
ACKNOWLEDGE
FROM SLAVE
R/W
R/W
START
CONDITION
STOP
CONDITION
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
START
CONDITION
SW00654
Figure 14. Random Read
SLAVE ADDRESS (MEMORY)
DATA FROM MEMORY
DATA FROM MEMORY
DATA FROM MEMORY
SDA
P
S
1
A5 A4 A3 A2 A1 A0
A
A
A
1
DATA n
DATA n+1
DATA n+X
R/W
START CONDITION
STOP
CONDITION
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM MASTER
ACKNOWLEDGE
FROM MASTER
SW00655
Figure 15. Sequential Read
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
2
CHARACTERISTICS OF THE I C-BUS
2
The I C-bus is for 2-way, 2-line communication between different ICs
Start and stop conditions
or modules. The two lines are a serial data line (SDA) and a serial
clock line (SCL). Both lines must be connected to a positive supply
via a pull-up resistor when connected to the output stages of a device.
Data transfer may be initiated only when the bus is not busy.
Both data and clock lines remain HIGH when the bus is not busy. A
HIGH-to-LOW transition of the data line, while the clock is HIGH is
defined as the start condition (S). A LOW-to-HIGH transition of the
data line while the clock is HIGH is defined as the stop condition (P)
(see Figure 17).
Bit transfer
One data bit is transferred during each clock phase. The data on the
SDA line must remain stable during the HIGH period of the clock
pulse as changes in the data line at this time will be interpreted as
control signals (See Figure 16).
System configuration
A device generating a message is a “transmitter”, a device receiving
is the “receiver”. The device that controls the message is the
“master” and the devices which are controlled by the master are the
“slaves” (see Figure 18).
SDA
SCL
DATA LINE
STABLE;
DATA VALID
CHANGE
OF DATA
ALLOWED
SW00542
Figure 16. Bit transfer
SDA
SDA
SCL
SCL
S
P
START CONDITION
STOP CONDITION
SW00543
Figure 17. Definition of start and stop conditions
SDA
SCL
MASTER
TRANSMITTER/
RECEIVER
SLAVE
TRANSMITTER/
RECEIVER
MASTER
TRANSMITTER/
RECEIVER
SLAVE
RECEIVER
MASTER
TRANSMITTER
SW00544
Figure 18. System configuration
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
out of the slave transmitter. The device that acknowledges has to
pull down the SDA line during the acknowledge clock pulse, so that
the SDA line is stable LOW during the HIGH period of the
acknowledge related clock pulse, set-up and hold times must be
taken into account.
Acknowledge (see Figure 19)
The number of data bytes transferred between the start and the stop
conditions from transmitter to receiver is not limited. Each byte of
eight bits is followed by one acknowledge bit. The acknowledge bit
is a HIGH level put on the bus by the transmitter whereas the
master generates an extra acknowledge related clock pulse.
A master receiver must signal an end of data to the transmitter by
not generating an acknowledge on the last byte that has been
clocked out of the slave. In this event the transmitter must leave the
data line HIGH to enable the master to generate a stop condition.
A slave receiver which is addressed must generate an acknowledge
after the reception of each byte. Also a master must generate an
acknowledge after the reception of each byte that has been clocked
DATA OUTPUT
BY TRANSMITTER
NOT ACKNOWLEDGE
ACKNOWLEDGE
DATA OUTPUT
BY RECEIVER
SCL FROM
MASTER
1
2
8
9
S
CLOCK PULSE FOR
ACKNOWLEDGEMENT
START
CONDITION
SW00545
2
Figure 19. Acknowledgment on the I C-bus
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
TYPICAL APPLICATION
Applications
• Board version tracking and configuration
• Board health monitoring and status reporting
• General-purpose integrated I/O with memory
• Replacement for PCF8574 with integrated 2-kbit EEPROM
• Multi-card systems in Telecom, Networking, and Base Station
• Bus master sees GPIO and EEPROM as two separate devices
• Six hardware address pins allow up to 64 PCA9501s to be located
Infrastructure Equipment
2
• Field recall and troubleshooting functions for installed boards
in the same I C/SMBus
UP TO 64 CARDS
2
I C
ASIC
2
I C
CPU
2
I C
OR
2
I C
µC
CONFIGURATION CONTROL
2
I C
PCA9501
CONTROL
INPUTS
ALARM
LEDs
2
I C
GPIO
MONITORING
AND
CONTROL
EEPROM
CARD ID, SUBROUTINES, CONFIGURATION DATA, OR REVISION HISTORY
SW02007
Figure 20. Typical application
A central processor/controller typically located on the system main
board can use the 400 kHz I C/SMBus to poll the PCA9501 devices
located on the system cards for status or version control type of
information. The PCA9501 may be programmed at manufacturing to
store information regarding board build, firmware version,
manufacturer identification, configuration option data… Alternately,
2
these devices can be used as convenient interface for board
2
configuration, thereby utilizing the I C/SMBus as an intra-system
communication bus.
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
TYPICAL APPLICATION
V
DD
2 kΩ
V
(optional)
1.6 kΩ
1.6 kΩ
1.1 kΩ
2 kΩ
DD
V
DD
SUBSYSTEM 1
(e.g. temp sensor)
SCL
SDA
SCL
I/0
I/0
0
SDA
INT
MASTER
CONTROLLER
INT
1
INT
I/0
I/0
2
RESET
GND
3
PCA9501
SUBSYSTEM 2
(e.g. counter)
I/0
4
A5
I/0
5
I/0
6
I/0
7
A
A4
Controlled Switch
(e.g. CBT device)
ENABLE
A3
A2
A1
A0
B
V
SS
ALARM
SUBSYSTEM 3
(e.g. alarm
system)
NOTE: GPIO device address configured as 0110000 for this example
EEPROM device address configured as 1110000 for this example
I/0 , I/0 , I/0 , configured as outputs
0
2
3
I/0 , I/0 , I/0 , configured as inputs
1
4
5
V
DD
I/0 , I/0 , are not used and have to be configured as outputs
06
7
SW01078
Figure 21. Typical application
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2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.
SYMBOL
PARAMETER
MIN
MAX
4.0
UNIT
V
V
CC
Supply Voltage
-0.5
V
I
Input Voltage
V
SS
- 0.5
5.5
V
I
DC Input Current
DC Output Current
Supply Current
-20
-25
-100
-100
—
20
mA
mA
mA
mA
mW
mW
_C
I
I
O
25
I
100
100
400
100
+150
+85
DD
I
Supply Current
SS
P
tot
Total Power Dissipation
P
O
Total Power Dissipation per Output
Storage Temperature
—
T
-65
-40
STG
T
Operating Temperature
_C
AMB
DC ELECTRICAL CHARACTERISTICS
T
= -40 _C to +85 _C unless otherwise specified; V = 3.3 V
amb
CC
SYMBOL
Supply
PARAMETER
MIN
TYP
MAX
UNIT
V
Supply Voltage
2.5
—
—
—
—
3.3
—
—
—
—
3.6
60
1
V
DD
I
Standby Current; A thru A , WC = HIGH
µA
mA
mA
V
DDQ
0
5
I
Supply Current Read
DD1
DD2
I
Supply Current Write
2
V
POR
Power on Reset Voltage
2.4
Input SCL; input, output SDA
V
Input LOW voltage
Input HIGH voltage
-0.5
—
—
—
—
—
0.3 V
V
V
IL
IH
DD
V
0.7 V
3
5.5
—
1
DD
I
OL
Output LOW current @ V = 0.4 V
mA
µA
pF
OL
I
L
Input leakage current @ V = V or V
SS
-1
I
DD
C
Input capacitance @ V = V
SS
—
7
I
I
I/O Expander Port
V
Input LOW voltage
Input HIGH voltage
-0.5
0.7 V
—
—
—
25
100
2
0.3 V
V
IL
DD
V
IH
5.5
400
—
V
DD
I
Input current through protection diodes
-400
10
30
—
µA
mA
µA
mA
pF
pF
IHL(max)
I
I
Output LOW current @ V = 1 V
OL
OL
Output HIGH current @ V = V
ss
300
—
OH
OH
I
Transient pull-up current
Input Capacitance
OHt
C
—
—
—
10
I
C
Output Capacitance
—
10
O
Address Inputs A thru A , WC input
0
5
V
Input LOW voltage
Input HIGH voltage
-0.5
—
—
—
25
0.3 V
V
V
IL
IH
L
DD
V
I
0.7 V
-1
5.5
1
DD
Input leakage current @ V = V
µA
µA
I
DD
Input leakage (pull-up) current @ V = V
10
100
I
SS
Interrupt output INT
I
Low level output current; V = 0.4 V
1.6
-1
—
—
—
mA
OL
OL
I
L
Leakage current @ V = V or V
SS
+1
µA
I
DD
15
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
NON-VOLATILE STORAGE SPECIFICATIONS
PARAMETER
SPECIFICATION
Memory cell data retention
10 years minimum
Number of memory cell write cycles
100,000 cycles minimum
2
I C-BUS TIMING CHARACTERISTICS
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
2
I C-bus timing (see Figure 22; Note 1)
f
SCL clock frequency
tolerable spike width on bus
bus free time
—
—
—
—
—
—
—
—
—
—
—
—
—
400
50
—
kHz
ns
µs
µs
µs
µs
µs
ns
ns
µs
µs
SCL
t
SW
t
1.3
0.6
0.6
—
BUF
t
t
START condition set-up time
START condition hold time
SCL and SDA rise time
SCL and SDA fall time
data set-up time
—
SU;STA
—
HD;STA
t
r
0.3
0.3
—
t
f
—
t
250
0
SU;DAT
HD;DAT
t
data hold time
—
t
t
SCL LOW to data out valid
STOP condition set-up time
—
1.0
—
VD;DAT
0.6
SU;STO
NOTE:
1. All the timing values are valid within the operating supply voltage and ambient temperature range and refer to V and V with an input
IL
IH
voltage swing of V to V
.
SS
DD
PORT TIMING CHARACTERISTICS
SYMBOL
PARAMETER
MIN
—
0
TYP
—
MAX
4
UNIT
µs
t
pv
Output data valid; C ≤ 100 pF
L
t
ps
Input data setup time; C ≤ 100 pF
—
—
—
4
µs
L
t
ph
Input data hold time; C ≤ 100 pF
4
—
µs
L
t
iv
Interrupt input data valid time; C ≤ 100 pF
—
—
—
µs
L
t
ir
Interrupt reset time; C ≤ 100 pF
—
4
µs
L
16
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
BIT 0
LSB
(R/W)
ACKNOWLEDGE
(A)
STOP
CONDITION
(P)
PROTOCOL
t
SU;STA
1 / f
SCL
SCL
SDA
t
t
t
f
BUF
r
t
t
t
t
t
HD;STA
SU;DAT
VD;DAT
SU;STO
HD;DAT
MBD820
SW00561
Figure 22.
POWER-UP TIMING
SYMBOL
PARAMETER
MAX.
UNIT
ms
1
t
Power-up to Read Operation
Power-up to Write Operation
1
5
PUR
1
t
ms
PUW
NOTE:
1. t
and t
are the delays required from the time V is stable until the specified operation can be initiated. These parameters are
CC
PUR
PUW
guaranteed by design.
WRITE CYCLE LIMITS
(5)
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
1
t
Write Cycle Time
—
5
10
ms
WR
NOTE:
1. t
is the maximum time that the device requires to perform the internal write operation.
WR
Write Cycle Timing
SCL
8th Bit
Word n
ACK
SDA
MEMORY
ADDRESS
t
WR
Stop
Condition
Start
Condition
SW00560
Figure 23.
17
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
SOLDERING
seconds depending on heating method. Typical reflow temperatures
range from 215 to 250°C.
Introduction
There is no soldering method that is ideal for all IC packages. Wave
soldering is often preferred when through-hole and surface mounted
components are mixed on one printed-circuit board. However, wave
soldering is not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these situations
reflow soldering is often used.
Preheating is necessary to dry the paste and evaporate the binding
agent. Preheating duration: 45 minutes at 45°C.
Wave soldering
Wave soldering is not recommended for SSOP packages. This is
because of the likelihood of solder bridging due to closely-spaced
leads and the possibility of incomplete solder penetration in
multi-lead devices.
This text gives a very brief insight to a complex technology. A more
in-depth account of soldering ICs can be found in our IC Package
Databook (order code 9398 652 90011).
If wave soldering cannot be avoided, the following conditions
must be observed:
DIP
• A double-wave (a turbulent wave with high upward pressure
followed by a smooth laminar wave) soldering technique
should be used.
Soldering by dipping or by wave
The maximum permissible temperature of the solder is 260°C;
solder at this temperature must not be in contact with the joint for
more than 5 seconds. The total contact time of successive solder
waves must not exceed 5 seconds.
• The longitudinal axis of the package footprint must be
parallel to the solder flow and must incorporate solder
thieves at the downstream end.
The device may be mounted up to the seating plane, but the
temperature of the plastic body must not exceed the specified
Even with these conditions, only consider wave soldering
SSOP packages that have a body width of 4.4 mm, that is
SSOP16 (SOT369-1) or SSOP20 (SOT266-1).
maximum storage temperature (T max). If the printed-circuit board
stg
has been pre-heated, forced cooling may be necessary immediately
after soldering to keep the temperature within the permissible limit.
During placement and before soldering, the package must be fixed
with a droplet of adhesive. The adhesive can be applied by screen
printing, pin transfer or syringe dispensing. The package can be
soldered after the adhesive is cured.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the lead(s) of
the package, below the seating plane or not more than 2 mm above
it. If the temperature of the soldering iron bit is less than 300°C it
may remain in contact for up to 10 seconds. If the bit temperature is
between 300 and 400°C, contact may be up to 5 seconds.
Maximum permissible solder temperature is 260°C, and maximum
duration of package immersion in solder is 10 seconds, if cooled to
less than 150°C within 6 seconds. Typical dwell time is 4 seconds at
250°C.
SO and SSOP
A mildly-activated flux will eliminate the need for removal of
corrosive residues in most applications.
Reflow soldering
Reflow soldering techniques are suitable for all SO and SSOP
packages.
Repairing soldered joints
Fix the component by first soldering two diagonally opposite end
leads. Use only a low voltage soldering iron (less than 24 V) applied
to the flat part of the lead. Contact time must be limited to
10 seconds at up to 300 °C. When using a dedicated tool, all other
leads can be soldered in one operation within 2 to 5 seconds
between 270 and 320°C.
Reflow soldering requires solder paste (a suspension of fine solder
particles, flux and binding agent) to be applied to the printed-circuit
board by screen printing, stencilling or pressure-syringe dispensing
before package placement.
Several techniques exist for reflowing; for example, thermal
conduction by heated belt. Dwell times vary between 50 and 300
18
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
19
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
HVQFN20: plastic, heatsink very thin quad flat package; no leads; 20 terminals;
body 5 x 5 x 0.85 mm
SOT662-1
20
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
REVISION HISTORY
Rev
Date
Description
_2
20030912
Product data (9397 750 12058); ECN 853-2370 30128 dated 18 July 2003.
Supersedes data of 2002 September 27 (9397 750 10327).
Modifications:
• Addition of HVQFN package type.
_1
2002 Sep 27
Product data (9397 750 10327); initial version
Engineering Change Notice: 853-2370 28875 (2002 Sep 09)
21
2003 Sep 12
Philips Semiconductors
Product data
8-bit I2C and SMBus I/O port with interrupt,
2-kbit EEPROM and 6 address pins
PCA9501
2
2
Purchase of Philips I C components conveys a license under the Philips’ I C patent
2
to use the components in the I C system provided the system conforms to the
I C specifications defined by Philips. This specification can be ordered using the
2
code 9398 393 40011.
Data sheet status
Product
status
Definitions
[1]
Level
Data sheet status
[2] [3]
I
Objective data
Development
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Qualification
Production
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Product data
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given
in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no
representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be
expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree
to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described
or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated
via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys
no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent,
copyright, or mask work right infringement, unless otherwise specified.
Koninklijke Philips Electronics N.V. 2003
Contact information
All rights reserved. Printed in U.S.A.
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 09-03
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
9397 750 12058
Philips
Semiconductors
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