F75386SG [FINTEK]
Dual ±1oC Accuracy Temperature Sensor IC with Fan Speed Control; 双± 1℃精确度温度传感器IC，具有风扇转速控制
| 型号： | F75386SG |
| 厂家： | 
FEATURE INTEGRATION TECHNOLOGY INC. |
| 描述： | Dual ±1oC Accuracy Temperature Sensor IC with Fan Speed Control |
| 文件： | 总28页 (文件大小：878K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
F75386M/F75386SG Datasheet
Dual ±1oC Accuracy Temperature Sensor IC with Fan Speed Control
Release Date: July, 2007
Revision: V0.27P
F75386
F75386 Datasheet Revision History
Version
0.20P
0.21P
0.22P
Date
Page
Revision History
Feb.,2005
Mar.,2005
Original version
Add ARA register Index FDh
17
Mar.,2005 11,13,18,23 (1) Revise Index 02/Index 16/Index 10-2Fh
(2) Add MSOP Package and delete SOP package
0.23P
0.24P
0.25P
0.26P
0.27P
Dec.,2005
Feb.,2006
Dec, 2006
Jan, 2007
July, 2007
Revise typo
Add SOP Green package description
Add Taiwan patent certification number
Register-0x4C description correction
Company readdress
1
15
-
Please note that all data and specifications are subject to change without notice. All the trade marks of products and
companies mentioned in this data sheet belong to their respective owners.
LIFE SUPPORT APPLICATIONS
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. Customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Fintek for any damages resulting from
such improper use or sales.
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Table of Contents
1.
2.
General Description............................................................................................................ 1
Features.............................................................................................................................. 1
Key Specifications .............................................................................................................. 2
Pin Configuration ................................................................................................................ 2
Pin Descriptions.................................................................................................................. 2
Functional Description ........................................................................................................ 3
6.1 General Description........................................................................................................ 3
6.2 Access Interface ............................................................................................................. 3
6.3 Typical Operating Characteristics ................................................................................... 5
6.4 Temperature Monitoring.................................................................................................. 6
6.4 Alert# Signal ................................................................................................................... 7
6.5 Temperature Fault Queue............................................................................................... 9
Registers Description.......................................................................................................... 9
3.
4.
5.
6.
7.
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
Configuration Register Index 03h (09h) ............................................................... 9
Status Register 1 Index 02h ................................................................................ 10
Status Register 2 Index 18h ................................................................................ 10
Real-Time Status Register Index 2Eh ................................................................ 11
Conversion Rate Register Index 04h (0Ah)........................................................ 11
Serial Interface Timeout Register Index 22h ...................................................... 12
ALERT MASK Register 1 Index 16h................................................................... 12
ALERT MASK Register 2 Index 17h.................................................................... 13
PWM Control Register Index 30h....................................................................... 13
FINTEK PWM Control Register Index 31h (Fintek Mode).................................. 14
PWM Control and Fan Monitor Register Index 4Ah ............................................ 14
Fan Spin-Up Configuration Register Index 4Bh ................................................. 14
PWM Value Register Index 4Ch......................................................................... 15
FAN PWM Frequency Register Index 4Dh......................................................... 15
Lookup Table Hysteresis Register Index 4Fh..................................................... 16
Temperature vs. PWM Duty Lookup Table Registers Index 50h to 5Fh ............. 16
ALERT Mode and Temperature Filter Control Register -- Index BFh ..................... 16
ARA Register--- Index FDh .................................................................................... 16
Vendor ID II (Manufacturer ID) Register Index FEh............................................ 17
Temperature and Fan Count Value Registers Index 10h- 2Fh ............................ 17
7.9
7.10
7.11
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
7.20
8.
9.
PCB Layout Guide............................................................................................................ 17
Electrical characteristic ..................................................................................................... 19
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9.1 Absolute Maximum Ratings............................................................................................. 19
9.2 DC Characteristics .......................................................................................................... 19
9.3 AC Characteristics........................................................................................................... 20
10 Ordering Information ........................................................................................................... 21
11
12
Package Dimensions ........................................................................................................ 22
Application Circuit................................................................................................................ 1
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1. General Description
The F75386 is a temperature sensor IC with fan speed monitoring and controlling function which
is specific designed for notebook etc. An 11-bit analog-to-digital converter (ADC) was built inside
F75386. The F75386 can provide 2 remote temperature sensor and 1 local temperature sensor. The
remote temperature sensor can be performed by CPU/GPU thermal diode or transistor 2N3906. The
F75386 can also provide alert signals for system protection which is optional with fan speed
monitoring and controlling. The users can set up the upper and lower limits (alarm thresholds) of all
monitored parameters and this chip will issue warning messages for system protection if there is
something wrong with monitored items. As for fan speed control, the fan speed will be related to
temperature variations. The F75386 can use PWM duty cycle output to automatically control fan
speed. There are 8 steps PWM duty cycle output for users to program according to the temperature
variations.
Through the BIOS or application software, the users can read all the monitored parameters of
system all the time. And a pop-up warning can be also activated when the monitored item was out of
the proper/pre-setting range. The F75386 is in the green package of 8-pin MSOP/SOP and powered
by 3.3V.
2. Features
Provide 1 on-chip local and 2 remote temperature sensing
9
±1 oC accuarcy on remote channel(+60 oC to +126 oC)
Integrated fan speed monitoring function and PWM duty cycle output for automatic fan speed control
User selectable multi-function pin for either tachometer input or ALERT# output function
User selectable multi-function pin for either PWM duty cycle output or THERM# output function
ALERT# output for SMBus alert
THERM# output for over temperature alert or for system shut down
Programmable THERM# limits and THERM# hysteresis
Programmable alert queue and limited and setting points(alert threshold) for monitored items
2 wire SMBus interface
3VCC operation and in 8-MSOP/SOP green package
Patented: TW235231, TWI263778
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3. Key Specifications
Supply Voltage
3.0~3.6V
Supply Current
630 uA (@ conversion rate = 16Hz)
0 ~ 145.75 oC
±1 oC from +60oC to +126oC
±3 oC from 0oC to +100oC
Measured Range
Remote Diode Temperature Accuracy
Local Temperature Accuracy
4. Pin Configuration
VCC
D1+
D2+
1
2
3
4
8
7
6
5
SCL
SDA
GND
F75386M
F75386SG
THERM#/PWMOUT
5. Pin Descriptions
POD12
INts
- Pure Open-drain output pin with 12 mA sink capability
- TTL level input pin and schmitt trigger
- Input pin(Analog)
AIN
PWR
- Power
PIN NO
PIN NAME
VCC
TYPE
PWR
AIN
PWR
VCC
VCC
DESCRIPTION
1
2
Power Pin
D1+
Positive connection to remote temperature sensor (ex: thermal
diode anode)
3
4
D2+
AIN
VCC
VCC
Positive connection to remote temperature sensor (ex: thermal
diode anode)
THERM#
POD12
This is a multi-function pin. Power-on default is THERM# function.
When it acts as PWMOUT function, it uses PWM duty cycle output
to control the fan speed. When it acts as THERM# function, it will be
asserted when the temperature exceeds its THERM limit.
(5V-tolerance)
PWMOUT
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5
6
GND
PWR
VCC
Ground
ALERT#
FANIN
OD12 / INts VCC
This is a multi-function pin. Power-on default is ALERT# function.
When it acts as ALERT# function, it will be asserted when the
temperature exceeds its high limit or goes below its low limit.
When it is as FANIN function, it is for monitoring the fan speed.
(5V-tolerance)
7
8
SDA
SCL
INts/OD12 VCC
Serial bus data
(5V-tolerance)
INts
VCC
Serial bus clock
(5V-tolerance)
6. Functional Description
6.1 General Description
The F75386 is a temperature sensor IC with fan speed monitoring and controlling function which is specific
designed for notebook etc. An 11-bit analog-to-digital converter (ADC) was built inside F75386. The F75386 can
provide 2 remote temperature sensor and 1 local temperature sensor. The remote temperature sensor can be
performed by CPU/GPU thermal diode or transistor 2N3906. The F75386 can also provide alert signals for
system protection which is optional with fan speed monitoring and controlling. The users can set up the upper
and lower limits (alarm thresholds) of all monitored parameters and this chip will issue warning messages for
system when there is something wrong with monitored items. As for fan speed control, the fan speed will be
related to temperature variation. The F75386 can use PWM duty cycle output to automatically control fan speed.
There are 8 steps PWM duty cycle output for users to program according to the temperature variation.
6.2 Access Interface
The F75386 can be connected to a compatible 2-wire serial system management bus as a slave device under the
control of the master device, using two device terminals SCL and SDA. The F75386 supports SMBus protocol of, “Write
Byte”, “Read Byte”, both with or without Packet Error checking(PEC) which is calculated using CRC-8. For detail
information about PEC, please check SMBus 1.1 specification. The F75386 supports 25ms timeout for no activity on
the SMBus. This timeout function is programmed at 22h bit7 and default is disabled. F75386 also supports Alert
Response Address(ARA) protocol.The operation of the protocol is described with details in the following sections.
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(a) SMBus write to internal address register followed by the data byte
0
7
8
0
7
8
SCL
SDA
1
0
0
1
1
0
0
R/W
D7
D6
D5
D4
D3
D2
D1
D0
Start By
Master
Ack
by
Ack
by
Frame 1
Frame 2
386
386
Serial Bus Address Byte
Internal Index Register Byte
0
7
8
SCL (Continued)
SDA (Continued)
D7
D6
D5
D4
D3
D2
D1
D0
Stop
by
Master
Frame 3
Data Byte
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
(b) Serial bus write to internal address register only
0
1
7
8
0
7
8
SCL
SDA
0
0
1
1
0
0
R/W
D7
D6
D5
D4
D3
D2
D1
D0
Start By
Master
Ack
by
Stop by
Master
Ack
by
Frame 1
Serial Bus Address Byte
Frame 2
Internal Index Register Byte
386
386
0
Figure 2. Serial Bus Write to Internal Address Register Only
(c) Serial bus read from a register with the internal address register prefer to desired location
0
7
8
0
7
8
SCL
SDA
1
0
0
1
1
0
0
R/W
D7
D6
D5
D4
D3
D2
D1
D0
Start By
Master
Ack
by
Master
Ack
by
Stop by
Master
Frame 1
Serial Bus Address Byte
Frame 2
Internal Index Register Byte
386
0
Figure 3. Serial Bus Read from Internal Address Register
(d) Alert Response Address
0
7
8
0
0
7
0
8
SCL
SDA
0
0
0
1
1
0
0
R/W
1
0
0
1
1
0
Start By
Master
Ack
by
Master
Ack
by
Stop by
Master
Frame 1
Alert Response Address
Frame 2
Device Address
386
0
Figure 4. Alert Response Address
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6.3 Typical Operating Characteristics
(a) Temperature Error vs.D+/D- Capacitance
Temperature error( ) vs. D+/D- capacitance
℃
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
0
10 20 30 40 50 60 70 80 90 100 110 120 130
Capacitance(nf)
(b) Local Temperature Error vs. Die Temperature
Local Temperature error( )
℃
3.5
3
2.5
2
1.5
1
0.5
0
-0.5
0
10 20 30 40 50 60 70 80 90 100 110 120
Temperature(
)
℃
(c) Remote Diode Error vs. Remote Temperature Error
Remote Temperature Error
2.5
2
1.5
1
0.5
0
-0.5
-1
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140
Temperature
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(d) Operating Supply Current vs. Conversion Rate
FAN output Duty = 100%
Operating current (uA)
FAN output Duty = 50%
900
800
700
600
500
400
300
200
100
0
0.0625 0.125
0.25
0.5
1
2
4
8
16
32
Conversion rate(Hz)
6.4 Temperature Monitoring
The F75386 can provide one local and two remote temperature sensors. Both can be measured from 0°C to
126.75°C. The temperature format is as the following table:
Temperature ( High Byte )
Digital Output
0000 0000
0000 0001
0001 1001
0011 0010
0100 1011
0101 1010
0110 0100
0111 1110
Temperature ( Low Byte )
0°C
Digital Output
000 0 0000
001 0 0000
010 0 0000
011 0 0000
100 0 0000
101 0 0000
110 0 0000
111 0 0000
0°C
1°C
0.125°C
25°C
50°C
75°C
90°C
100°C
126°C
0.250°C
0.375°C
0.500°C
0.625°C
0.750°C
0.875°C
Remote-sensor transistor manufacturers
Manufacturer
Panasonic
Philips
Model Number
2SB0709 2N3906
PMBT3906
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6.4 Alert# Signal
ALERT#/FANIN (pin 6) can be used as ALERT# output or fan tachometer input by setting Configuration Register (index
03h). When pin 6 is used as ALERT# output, there are three different alert functions can be used. The interrupt methods that
ALERT# pin can act are (1) Comparator mode (2) Interrupt mode (3) Alert Response Address mode.
6.4.1 Comparator mode
When the Comparator Mode bit in Configuration Register (index BFh) is asserted, ALERT# is used as a temperature
comparator. If the triggering conditions occur, ALERT# will go to low and relative alert status will be asserted until those
conditions are no longer present. This mode is not the power-on default state. Note that the triggering conditions do not
include BUSY and OPEN status in Configuration Register (index 02h).
Remote Temperature High Limit
Monitoring Remote Temperature
F75386 ALERT# pin
Remote High Alert Status
TIME
6.4.2 Interrupt mode
The F75386’s ALERT# output can be used as a simple interrupt signal if Comparator Mode bit is not asserted. If the
triggering conditions occur, relative alert status will be asserted and ALERT# will go to low. The F75386 will set the ALERT
Mask bit and relative alert status will be cleared after master’s reading of the Status Register (Index 02h or 18h). The ALERT
Mask bit is set in order to prevent further ALERT# triggering after the end of one temperature conversion if the triggering
conditions are still present. At the end of interrupt service routine, the master has to reset ALERT Mask bit in configuration
register. Note that the triggering conditions do not include BUSY and OPEN status in Configuration Register (index 02h).
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Remote Temperature High Limit
Monitoring Remote Temperature
F75386 ALERT# pin
Remote High Alert Status
ALERT Mask
End of temperature conversion
ALERT Mask is set and Alert Status is clear
after reading status register
TIME
6.4.3 Alert Response Address mode
If ALERT# is connected to one or more ALERT# outputs of SMBus compatible devices, the master may send an ARA
command to ask that which device is pulling ALERT# to low. When the ALERT# is pulled to low by F75386 and F75386
receives the ARA command sent by the master, F75386 will send its address to the master. The F75386 will reset its
ALERT# output and set the ALERT Mask bit once the master acknowledges its response of device address. The master may
read F75386’s status registers to check what the triggering conditions occur. At the end of interrupt service routine, the
master has to reset ALERT Mask bit in configuration register. Note that the triggering conditions do not include BUSY and
OPEN status in Configuration Register (index 02h). The ARA, 000 1100, is a general call address and is defined in SMBus
specifications. No devices should be assigned to this address.
Remote Temperature High Limit
Monitoring Remote Temperature
F75386 ALERT# pin
Remote High Alert Status
Alert Status is cleared after reading
status register
ALERT Mask
ALERT Mask is set after alerting device
address is transmitted correctly
TIME
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6.5
Temperature Fault Queue
The F75386 provides a Fault Queue bit in Configuration Register (index 03h) to prevent false alert triggering. By setting
Fault Queue bit to a 1, the F75386 will require three consecutive triggering conditions of temperature readings to set
relative alert status bits to 1. The power-on default value of Fault Queue bit is 0.
Monitoring Remote Temperature
Remote Temperature High Limit
Remote High Alert Status (comparator mode)
n
n+1
n+2
n+3 n+4
n+5
n+6
n+7
n+8
n+9
n+10 n+11
Sample Number
7. Registers Description
7.1 Configuration Register Index 03h (09h)
Power on default <7:0> = 00h
Bit
7
Name
Attribute
R/W
Description
ALERT_MASK
RUN_STOP
Set to 1, mask ALERT# signal output.
6
R/W
Set to 0, monitor. Set to 1, stop monitor (in standby).
5
PWM_DIS_STBY
R/W
Set to 1, PWMOUT will be disabled while in standby. (when bit 6 is set to 1)
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Set to 0, the F75386’s PWM output continues to output the control signal while in
standby. (when bit 6 is set to 1)
4~3
2
Reserved
ALERT_TACH_SEL
Reserved
RO
R/W
RO
These bits are unused and always set to 0
Set to 1, pin6 acts as fan Tachometer input.
Set to 0, pin6 acts as ALERT output.
1
This bit is unused and always set to 0
Set to 1, an ALERT# will be generated if consecutive abnormal events occur three times.
Set to 0, an ALERT# will be generated if any abnormal event occurs.
0
ALERT_QUEUE
R/W
7.2 Status Register 1 Index 02h
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
T2 = Pin 2 external temperature sensor (Remote)
Bit
Name
Attribute
Description
Set to 1, ADC is converting.
7
ADC_BUSY
RO
Set to 1, T1 temperature exceeds high limit.
Set to 0, T1 temperature does not exceed high limit.
Set to 1, T1 temperature goes below low limit.
Set to 0, T1 temperature does not go below low limit.
Set to 1, T2 temperature exceeds high limit.
Set to 0, T2 temperature does not exceed high limit.
Set to 1, T2 temperature goes below low limit.
Set to 0, T2 temperature does not go below low limit.
Set to 1, T2 is open-circuit
6
5
4
3
2
1
0
T1_HIGH_STS
T1_LOW_STS
T2_HIGH_STS
T2_LOW_STS
T2_OPEN_STS
T2_THERM_STS
FAN_ALARM
RO
RO
RO
RO
RO
RO
RO
Set to 0, T2 is not open-circuit
Set to 1, T2 temperature exceeds its thermal limit.
Set to 0, T2 temperature does not exceed its thermal limit.
Set to 1, FAN count is higher than the FAN limit value
Set to 0, FAN count is equal or lower than the FAN limit value.
7.3 Status Register 2 Index 18h
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
T3= Pin 3 external temperature sensor (Remote)
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Bit
Name
Attribute
Description
Set to 1, T1 temperature exceeds its THERM limit.
Set to 0, T1 temperature does not exceed its THERM limit.
This bit is unused and always set to 0
7
T1_THERM_STS
RO
6
5
4
Reserved
RO
RO
RO
Reserved
This bit is unused and always set to 0
T3_HIGH_STS
Set to 1, T3 temperature exceeds high limit.
Set to 0, T3 temperature does not exceed high limit.
Set to 1, T3 temperature goes below low limit.
Set to 0, T3 temperature does not go below low limit.
Set to 1, T3 is open-circuit or shorted to VDD.
Set to 0, T3 is not open-circuit and not shorted to VDD
Set to 1, T3 temperature exceeds its THERM limit.
Set to 0, T3 temperature does not exceeds its THERM limit.
This bit is unused and always set to 0
3
2
1
0
T3_LOW_STS
T3_OPEN_STS
T3_THERM_STS
Reserved
RO
RO
RO
RO
7.4 Real-Time Status Register Index 2Eh
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
T2 = Pin 2 external temperature sensor (Remote)
T3= Pin 3 external temperature sensor (Remote)
Bit
Name
Attribute
RO
Description
7-3
Reserved
T3_THERM
These bits are unused and always set to 0
Set to 1, T3 temperature exceeds its thermal limit
This is a real-time event status
RO
2
1
0
Set to 1, T2 temperature exceeds its thermal limit
This is a real-time event status
T2_THERM
T1_THERM
RO
RO
Set to 1, T1 temperature exceeds its thermal limit
This is a real-time event status
7.5 Conversion Rate Register Index 04h (0Ah)
Power on default <7:0> = 08h
Bit
Name
Attribute
Description
7-0
CONV_RATE
R/W
Set conversion times per second.
Value Conversion/Sec
Value
Conversion/Sec
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00h
01h
02h
03h
04h
05h
0.0625
0.125
0.25
0.5
06h
07h
4
8
08h
16
32
09h
1
0Ah ~ FFh
Reserved
2
7.6 Serial Interface Timeout Register Index 22h
Power on default <7:0> = 00h
Bit
7
Name
Attribute
R/W
Description
EN_I2CTMOUT
Reserved
Set to 1, enable serial interface timeout function. (25ms). Set to 0, disable.
These bits are unused and always set to 0
6-0
RO
7.7 ALERT MASK Register 1 Index 16h
Power on default <7:0> = A4h
T1 = On-chip temperature sensor (Local)
T2 = Pin 2 external temperature sensor (Remote)
Description
Bit
Name
Attribute
7
Reserved
RO
This bit is unused and always set to 1
Set to 1, T1 temperature exceeds high limit will not generate an ALERT.
Set to 0, T1 temperature exceeds high limit will generate an ALERT.
Set to 1, T1 temperature goes below low limit will not generate an ALERT.
Set to 0, T1 temperature goes below low limit will generate an ALERT.
Set to 1, T2 temperature exceeds high limit will not generate an ALERT.
Set to 0, T2 temperature exceeds high limit will generate an ALERT.
Set to 1, T2 temperature goes below low limit will not generate an ALERT.
Set to 0, T2 temperature goes below low limit will generate an ALERT.
This bit is unused and always set to 1
6
5
4
T1H_MASK
T1L_MASK
T2H_MASK
RO
RO
RO
3
2
1
T2L_MASK
Reserved
RO
RO
RO
Set to 1, T2 temperature exceeds its thermal limit will not generate an ALERT.
Set to 0, T2 temperature exceeds its thermal limit will generate an ALERT.
Set to 1, FAN count exceeds its limit will not generate an ALERT.
Set to 0, FAN count exceeds its limit will generate an ALERT.
T2_THR_MASK
0
FAN_MASK
RO
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7.8 ALERT MASK Register 2 Index 17h
Power on default <7:0> = 00h
T3 = Pin 3 external temperature sensor (Remote)
Bit
Name
Attribute
Description
Set to 1, T3 temperature exceeds its THERM limit will not generate an ALERT.
Set to 0, T3 temperature exceeds its THERM limit will generate an ALERT.
These bits are unused and always set to 0
7
T1_THR_MASK
Reserved
RO
6-5
4
RO
Set to 1, T3 temperature exceeds high limit will not generate an ALERT.
Set to 0, T3 temperature exceeds high limit will generate an ALERT.
Set to 1, T3 temperature goes below low limit will not generate an ALERT.
Set to 0, T3 temperature goes below low limit will generate an ALERT.
This bit is unused and always set to 0
T3H_MASK
RO
3
2
1
0
T3L_MASK
Reserved
RO
RO
RO
RO
Set to 1, T3 temperature exceeds its THERM limit will not generate an ALERT.
Set to 0, T3 temperature exceeds its THERM limit will generate an ALERT.
This bit is unused and always set to 0
T3_THR_MASK
Reserved
7.9 PWM Control Register Index 30h
Power on default <7:0> = 20h
Bit
7
Name
Attribute
R/W
Description
Set method of controlling PWM duty and frequency to FINTEK mode.
This bit is unused and always set to 0
FTK_MODE
Reserved
6
RO
When bit7 set to 0, tachometer input filter can be selected here.
2’b00: Filter time = 177.6us
2’b01: Filter time = 355.2us
2’b10: Filter time = 888us
5-4
FLT_SEL
R/W
2’b11: Filter time = 1.776ms
3
2
Reserved
RO
This bit is unused and always set to 0
Set to 1, disable the clock adjustment for different operating temperature.
Set to 0, enable the clock adjustment for different operating temperature.
Set to 1, select PWMOUT output.
DIS_CLKCTRL
R/W
1
0
PT_SEL
ONE_T
R/W
R/W
Set to 0, select THERM# output.
Set to 1, select only one external thermal diode. At this mode, T3(2nd external) ‘s reading
and status will be set to FFh and 00h.
Set to 0, select two external thermal diodes.
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7.10 FINTEK PWM Control Register Index 31h (Fintek Mode)
Power on default <7:0> = 00h
Bit
Name
Attribute
Description
Set to 0, PWM source clock is 2 MHz.
Set to 1, PWM source clock is 200 kHz.
7
FTK_PWMCLK_SEL
R/W
Set to 0 or 1 makes no different. PWM clock is divided by this value.
PWM clock = PWMOUT source clock/FTK_PREDIV
6-0
FTK_PREDIV
R/W
7.11 PWM Control and Fan Monitor Register Index 4Ah
Power on default <7:0> = 20h
Bit
Name
Attribute
Description
These bits are not used and always set to 0
7-6
Reserved
RO
0: operates in TEMPERATURE mode. PWMOUT duty-cycle is automatically adjusted
according to the T-P (Temperature vs. PWM) lookup table. Look-up table is locked.
1: operates in MANUAL mode. Software set the PWMOUT duty-cycle directly. Look-up
table is programmable.
5
4
PWM_MODE
PWM_INV
R/W
R/W
0: PWM output will be 0 V to turn off FAN and open (High-Z) to turn on fan.
1: PWM output will be open to turn off FAN and 0 V to turn on fan.
1: PWMOUT frequency source is 333 kHz.
3
2
PWM_CLK_SEL
Reserved
R/W
R/W
0: PWMOUT frequency source is 1.4 kHz.
This bit is not used and always set to 0
00: Traditional Tachometer Input Mode
01: Improved Traditional Tachometer Input Mode
1-0
Tachometer Mode
R/W
10: Most Accurate Mode
11: Least Effort Mode
Note: If the PWM Clock is 333 kHz, Traditional Tachometer Input Mode is always used.
7.12 Fan Spin-Up Configuration Register Index 4Bh
Power on default<7:0> = 3Fh
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Bit
Name
Attribute
Description
These bits are not used and always set to 0.
7-6
Reserved
RO
0: The spin-up time and duty depends on bit 4-0.
1: Sets the PWMOUT to 100% until the spin-up times out or the minimum RPM limit is
reached. When this bit is set, the spin-up duty cycle is always 100%.
Fast Tachometer
Spin-up
5
R/W
R/W
If PWM spin up time (bit2-0) = 000, the spin-up process is bypassed.
00: No spin-up (unless bit5 is set to 0)
01: 50%
10: 75%~81%. Depends on PWM frequency select.
11: 100%.(default)
PWM Spin-Up Duty
Cycle
4-3
The time unit is 0.5 second. The default time is 3.5 seconds
000: No Spin-up.
001: 0.5 seconds
010: 1.0second
011: 1.5 second
100: 2.0 second
101: 2.5 second
110: 3.0 second
111: 3.5 second
2-0
PWM Spin-Up Time
R/W
7.13 PWM Value Register Index 4Ch
Power on default<7:0> =00h
Bit
Name
Attribute
Description
If PWM_MODE is set to 0, this register is read only and reflects the current PWM
duty-cycle value from the T-P lookup table.
If PWM_MODE is set to 1, this register is read/write and the software programs this
register directly.
7-0
PWM_DUTY
R/W
7.14 FAN PWM Frequency Register Index 4Dh
Power on default<7:0> =17h
Bit
Name
Attribute
Description
These bits are unused and always set to 0
7-5
Reserved
RO
PWM frequency = PWM_CLK / 2n
(PWM_CLK = 333 kHz or 1.4 kHz , n = value of this register)
4-0
PWM_FREQ
R/W
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7.15 Lookup Table Hysteresis Register Index 4Fh
Power on default<7:0> = 04h
Bit
7-5
4-0
Name
Attribute
RO
Description
These bits are unused and always set to 0
Lookup table hysteresis. (Default 4°C ; 1LSB = 1°C)
Reserved
LOOKUP HYST
R/W
7.16 Temperature vs. PWM Duty Lookup Table Registers Index 50h to 5Fh
Power on default<7:0> = 7Fh and 3Fh
Description
This bit is unused and always set to 0
Index
Name
Bits
7
50(52,54,56,58,
5A,5C,5E)
TEMP(x)
When T2 (external) temperature exceeds (greater than) this value, PWM output will be
the value of INDEX 5(y)h register.
6-0
7-6
5-0
These bits are unused and always set to 0
51(53,55,57,59,
5B,5D,5F)
DUTY(y)
PWM output value corresponds to the temperature entry in INDEX 5(x)h.
7.17 ALERT Mode and Temperature Filter Control Register -- Index BFh
Power on default<7:0> = 00h
Bit
7-3
2-1
Name
Attribute
RO
Description
These bits are unused and always set to 0
Rewriteable register
Reserved
Reserved
Comparator
Mode
R/W
0: ALERT# is INTERRUPT mode
1: ALERT# is COMPARATOR mode
0
R/W
7.18 ARA Register--- Index FDh
Power on default: 0Ch. (ARA address = 18h)
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7.19 Vendor ID II (Manufacturer ID) Register Index FEh
Power on default: 23h.
7.20 Temperature and Fan Count Value Registers Index 10h- 2Fh
T1: Local Temperature. T2: External Temperature 1. T3:External Temperature 2
The value in quota is its power-on default value.
Address
Description
Attribute
Address (Low Byte)
(High Byte)
00h
T1 reading
T2 reading
RO
1Ah
RO
01h
10h
T3 reading
RO
28h
29h
T1 High Limit
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
05h/0Bh (46h)
06h/0Ch (00h)
07h/0Dh (55h)
08h/0Eh (55h)
2Ah (55h)
2Bh (00h)
20h (55h)
23h (0Ah)
19h (64h)
21h (0Ah)
24h (55h)
25h (0Ah)
47h (FFh)
49h (FFh)
1Bh (00h)
1Ch (00h)
13h (00h)
14h (00h)
2Ch (00h)
2Dh (00h)
T1 Low Limit
T2 High Limit
T2 Low Limit
T3 High Limit
T3 Low Limit
T1 Thermal Limit
T1 Thermal Hysteresis
T2 Thermal Limit
T2 Thermal Hysteresis
T3 Thermal Limit
T3 Thermal Hysteresis
FAN Tachometer Count
FAN Tachometer Limit
46h (FFh)
48h (FFh)
8. PCB Layout Guide
PCB can be electrically noisy environments, and the F75386 is measuring very small voltage from the
remote sensor, so care must be taken to minimize noise which is occurred at the sensor inputs. The
following guideline should be taken to reduce the measurement error of the temperature sensors:
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1. Place the F75386 as close as practical to the remote sensing diode. In noisy environments, such as a
computer main-board, the distance can be 4 to 8 inches. (typ). This length can be increased if the worst
noise sources are avoided. Noise sources generally include clock generators, CRTs, memory buses
and PCI/ISA bus etc.
2. Route the D+ and Pin5 GND(D-) tracks close together, in parallel, with grounded guard tracks on each
side. Provide a ground plane under the tracks if possible. Do not route D+ & Pin5 GND(D-) lines next to
the deflection coil of the CRT. And also don’t route the trace across fast digital signals which can easily
induce bigger error.
GND
10MILS
D+
10MILS
MINIMUM
Pin5 GND(D-)
10MILS
10MILS
GND
3. Use wide tracks to minimize inductance and reduce noise pickup. 10 mil track minimum width and
spacing is recommended.
4. Try to minimize the number of copper/solder joints, which can cause thermocouple effects. Where
copper/solder joints are used, make sure that they are in both the D+ and Pin5 GND(D-) path and at
the same temperature. Thermocouple effects should not be a major problem as 1℃corresponds to
about 200µV. It means that a copper-solder thermocouple exhibits 3µV/℃, and takes about 200µV of
the voltage error at D+ & Pin5 GND(D-) to cause a 1℃measurement error. Adding a few
thermocouples causes a negligible error.
5. Place a 0.1µF bypass capacitor close to the VDD pin. In very noisy environments, place an external
3300pF input filter capacitors across D+, Pin5 GND(D-) close to the F75386.
6. If the distance to the remote sensor is more than 8 inches, the use of twisted pair cable is
recommended. It will work up to around 6 to 12 feet.
7. Because the measurement technique uses switched current sources, excessive cable and/or filter
capacitance will affect the measurement accuracy. When using long cables, the filter capacitor may be
reduced or removed. Cable resistance can also induce errors. 1 Ω series resistance introduces about
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0.5℃error.
9. Electrical characteristic
9.1 Absolute Maximum Ratings
PARAMETER
RATING
UNIT
V
Power Supply Voltage
Input Voltage
-0.5 to 5.5
-0.5 to VDD+0.5
0 to +140
V
Operating Temperature
Storage Temperature
° C
° C
-55 to 150
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of
the device
9.2 DC Characteristics
(TA = 0° C to 70° C, VDD = 3.3V ± 10%, VSS = 0V )
Parameter
Conditions
MIN
TYP
± 1
± 1
± 1
3.3
MAX Unit
Temperature Error, Remote Diode
60 oC < TD < 126 oC, VCC = 3.0V to 3.6V
0 oC <TD < 60 oC; 126 oC <TD < 145 oC;
0 oC < TA < 100 oC, VCC = 3.0V to 3.6V
oC
± 3
Temperature Error, Local Diode
Supply Voltage range
oC
± 3
3.0
3.6
V
Average operating supply current
16 Conversions / Sec Rate
630
430
5
uA
uA
uA
oC
V
0.0625 Conversions / Sec Rate
Standby supply current
Resolution
0.125
2.55
2.2
Under-voltage lockout threshold
Power on reset threshold
Diode source current
VDD input, Disables ADC , Rising Edge
2.4
V
High Level
Low Level
95
uA
uA
10
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(TA = 0° C to 70° C, VDD = 3.3V ± 10%, VSS = 0V)
PARAMETER SYM. MIN.
OD16 - Open-drain output pin with sink capability of 16 mA
TYP.
MAX.
UNIT
CONDITIONS
Output Low Current
IOL
10
12
mA
VOL = 0.4V
INts TTL level Schmitt-triggered input pin
-
Input Low Threshold Voltage
Input High Threshold Voltage
Input High Leakage
Vt-
0.4
0.8
2.0
V
VDD = 3.3V
VDD = 3.3V
VIN = VDD
VIN = 0 V
Vt+
ILIH
ILIL
2.4
1
V
µA
µA
Input Low Leakage
1
9.3 AC Characteristics
t
t
SCL
R
t
R
SCL
t
t
SU;STO
t
SU;DAT
HD;SDA
SDA IN
VALID DATA
t
HD;DAT
SDA OUT
Serial Bus Timing Diagram
Serial Bus Timing
PARAMETER
SYMBOL
t-SCL
MIN.
0.5
0.5
0.5
50
MAX.
UNIT
uS
SCL clock period
10000
Start condition hold time
Stop condition setup-up time
DATA to SCL setup time
DATA to SCL hold time
SCL and SDA rise time
SCL and SDA fall time
tHD;SDA
tSU;STO
tSU;DAT
tHD;DAT
tR
uS
uS
nS
50
nS
0.4
0.4
uS
tF
uS
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10 Ordering Information
Part Number
F75386M
Package Type
Production Flow
8 pin MSOP Green Package
8 pin SOP Green Package
Commercial, 0°C to +70°C
Commercial, 0°C to +70°C
F75386SG
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11 Package Dimensions
(F75386M 8-MSOP Package )
8
c
5
E
HE
L
1
4
O
0.25
D
A
Y
e
SEATING PLANE
GAUGE PLANE
A1
b
Control demensions are in milmeters
.
DIMENSION IN MM
SYMBOL
DIMENSION IN INCH
MIN.
1.35
MAX.
1.75
MIN.
MAX.
0.053
0.069
0.010
0.020
A
A1
b
0.10
0.33
0.19
0.25
0.51
0.004
0.013
c
0.25
0.008
0.150
0.188
0.010
0.157
3.80
4.80
E
D
4.00
5.00
0.196
e
0.050 BSC
1.27 BSC
6.20
0.10
1.27
10
HE
5.80
0.228
0.244
0.004
0.050
10
Y
0.40
0
0.016
0
L
θ
(F75386SG 8-SOP Package )
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Feature Integration Technology Inc.
Headquarters
Taipei Office
3F-7, No 36, Tai Yuan St.,
Bldg. K4, 7F, No.700, Chung Cheng Rd.,
Chungho City, Taipei, Taiwan 235, R.O.C.
TEL : 866-2-8227-8027
Chupei City, Hsinchu, Taiwan 302, R.O.C.
TEL : 886-3-5600168
FAX : 886-3-5600166
FAX : 866-2-8227-8037
P
l
www: http://www.fintek.com.tw
Please note that all datasheet and specifications are subject to change without notice. All the trade
marks of products and companies mentioned in this datasheet belong to their respective owner.
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July, 2007
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12 Application Circuit
VCC3V
Example 1:
If use THERM# and ALERT#
TEMPERATURE MONITOR (CPU THERMAL DIODE)
VCC3V
C2
THERDA
D1+
0.1u
R2
R3
THERM#/PWM
ALERT#/TACH
R4 4.7K
R5 4.7K
4.7K 4.7K
C1
AGND
3300pF
THERDC
U1
1
2
3
4
8
7
6
5
SCLK
VCC
D1+
SCLK
SDAT
D1+
SDATA
D2+
ALERT#/TACH
AGND
Example 2:
D2+ ALERT#/TACH
THERM#/PWM
THERM#/PWM GND
F75386
TEMPERATURE MONITOR (2N3906)
D1+
VCC3V
+12V
4.7K
Q1
C3
R18
R19
2N3906
3300pF
AGND
Q2
4.7K
PNP
R25
10K
R20
D1
4.7K
C8
JP1
R22
27K
ALERT#/TACH
R24
Q3
NMOS
+
3
2
1
R23
THERM#/PWM
330
47U
10K
+12V
C10
0.1U
CON3
D2
R21
4.7K
FAN Circuit for High PWM Frequency
JP2
R30
27K
ALERT#/TACH
3
2
1
R28
10K
CON3
C11
0.1U
R27
470
VCC3V
R26
10
THERM#/PWM
Q4
NPN
Title
Feature Integration Technology Inc.
FAN Circuit for Low PWM Frequency
Size
A
Document Number
Rev
0.1
F75386 Application Circuit
Date:
Tuesday, February 15, 2005
Sheet
1
of
1
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