FINTEK F75363

F75363 Datasheet
±1oC Accuracy Temperature Sensor IC with Fan Speed Control
Release Date: July, 2007
Revision: V0.27P
F75363
F75363 Datasheet Revision History
Version
Date
0.20P
Jan.,2005
0.21P
Feb.,2005
Page
Revision History
Original version (Confidential)
16
1. Update ARA register/Index FDh
2. Update Vendor ID(Manufacture ID) Register/Index FEh
3. Add version ID Register/Index FFh
0.22P
May.,2005
11
1. Update Alert Mask Register default value
15
2. Update version ID Register/Index FFh
16
3. Update T1 HIGH LIMIT default value
0.23P
0.24P
Updated typo and patent
July, 2006
12
1. Alert mask register1, Index 16h correction
2. Alert mask register2, Index 17h correction
13
3. PWM control and fan monitor register, Index 4Ah correction
0.25P
Dec, 2006
1
Add Taiwan patent certification number
0.26P
Jan, 2007
14
Register-0x4C description correction
0.27P
July,2007
-
Company readdress
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.
3.
4.
5.
6.
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 ................................................................................ 4
6.4
Temperature Monitoring............................................................................................... 6
6.4 Alert# Signal ................................................................................................................... 7
6.5
Temperature Fault Queue ............................................................................................. 9
7.
Registers Description.......................................................................................................... 9
7.1 Configuration Register  Index 03h (09h) ...................................................................... 9
7.2 Status Register  Index 02h......................................................................................... 10
7.3 Status Register  Index 18h......................................................................................... 10
7.4 Real-Time Status Register  Index 2Eh ....................................................................... 11
7.5 Conversion Rate Register  Index 04h (0Ah) .............................................................. 11
7.6 Serial Interface Timeout Register  Index 22h ............................................................. 11
7.7 ALERT MASK Register 1  Index 16h ......................................................................... 11
7.8 ALERT MASK Register 2  Index 17h ......................................................................... 12
7.9 PWM Control Register  Index 30h ............................................................................. 12
7.10 FINTEK PWM Control Register  Index 31h (Fintek Mode)....................................... 13
7.11 PWM Control and Fan Monitor Register Index 4Ah ................................................. 13
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
Fan Spin-Up Configuration Register  Index 4Bh ...................................................... 14
PWM Value Register  Index 4Ch ............................................................................. 14
FAN PWM Frequency Register  Index 4Dh.............................................................. 14
Lookup Table Hysteresis Register  Index 4Fh.......................................................... 15
Temperature vs. PWM Duty Lookup Table Registers  Index 50h to 5Fh .................. 15
ALERT Mode and Temperature Filter Control Register -- Index BFh .......................... 15
ARA Register --- Index FDh ........................................................................................ 15
Vendor ID II (Manufacturer ID) Register  Index FEh ................................................ 15
7.20
Version ID Register  Index FFh................................................................................ 15
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7.21 Temperature and Fan Count Value Registers Index 10h- 2Fh ................................. 15
8.
PCB Layout Guide ............................................................................................................ 16
9.
Electrical characteristic ..................................................................................................... 17
9.1 Absolute Maximum Ratings............................................................................................. 17
9.2 DC Characteristics .......................................................................................................... 18
9.3 AC Characteristics........................................................................................................... 19
10. Ordering Information ......................................................................................................... 19
11. Package Dimensions ........................................................................................................ 20
10 Application Circuit .................................................................................................................... 1
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1.
General Description
The F75363 is a temperature sensor IC with PWM duty cycle output which is specific designed for graphic
cards etc. An 11-bit analog-to-digital converter (ADC) was built inside F75363. The F75363 can monitor
temperature and fan speed which is important for the system to work stably and properly. This chip provides 1
remote temperature sensor and 1 local temperature sensor. The remote temperature sensor can be performed
by CPU/GPU thermal diode or transistor 2N3906. The users can set up the upper and lower limits (alarm
thresholds) of all monitored parameters and this chip can also issue warning messages for system protection
when there is something wrong with monitored items. As for fan speed control, the F75363 can use PWM duty
cycle output to automatically control fan speed. The fan speed control is related to temperature variation. There
is 8-step lookup table for users to program PWM duty cycle output to control fan speed according to the
temperature variation. The F75363 is in the package of 8-pin SOP and powered by 3.3V.
2.
Features
‹
Provide 1 on-chip local and 1 remote temperature sensing
‹
Accuarcy
9
o
o
o
±1 C accuarcy on remote channel (+60 C to +126 C)
9
o
o
o
±3 C accuarcy on local channel(+0 C to +100 C)
‹
User selectable multi-function pin for either PWM duty cycle output or THERM# signal output function
‹
User selectable multi-function pin for either ALERT# output or tachometer input function
‹
Automatic fan speed control with user programmable 8-step lookup table
‹
Programmable alert queue and limited and setting points(alert threshold) for monitored items
‹
2 wire SMBus interface and ALERT# output for SMBus alert
‹
3VCC operation and in 8-SOP package
Patented: TWI235231, TWI263788
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3.
Key Specifications
4.
5.
‹
Supply Voltage
3.0~3.6V
‹
Supply Current
630 uA (typ) (@ conversion rate = 16Hz)
‹
Measured Range
0 ~ 126.75 oC
‹
Remote Diode Temperature Accuracy
±1 oC from +60oC to +126oC
‹
Local Temperature Accuracy
±3 oC from +0oC to +100oC
Pin Configuration
VCC
1
8
SCL
D+
2
7
SDA
D-
3
6
ALERT#/FANIN
PWMOUT/THERM#
4
5
GND
Pin Descriptions
POD12
- Pure Open-drain output pin with 12 mA sink capability
INts
- TTL level input pin and schmitt trigger
AIN
- Input pin(Analog)
PWR
- Power
Pin No
Pin Name
Type
Description
1
VCC
PWR
Power Pin
2
D+
AIN
Positive connection to remote temperature sensor (ex:
thermal diode anode)
3
D-
AIN
Negative connection to remote temperature sensor(ex:
thermal diode cathode)
4
PWMOUT / THERM#
POD12
This is a multi-function pin. Power-on default is PWMOUT
(5V-tolerance)
function. When it acts as PWMOUT function, it controls the
fan speed. When it acts as THERM# function, it will be
asserted when the temperature exceeds its thermal limit.
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5
GND
PWR
Ground
6
ALERT# / FANIN
POD12 / INts
This is a multi-function pin. Power-on default is ALERT#
(5V-tolerance)
function. When it is used 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.
7
SDA
INts/POD12
Serial bus data
(5V-tolerance)
8
SCL
INt s ( 5 V - t o l e r a n c e )
Serial bus clock
6. Functional Description
6.1
General Description
The F75363 is a temperature sensor IC with PWM duty cycle output which is specific designed for graphic cards etc.
An 11-bit analog-to-digital converter (ADC) was built inside F75363. This chip provides 1 remote temperature sensor
and 1 local temperature sensor. The remote temperature sensor can be performed by CPU/GPU thermal diode or
transistor 2N3906. Users can set up the upper and lower limits (alarm thresholds) of monitored parameters and this
chip can also issue warning messages for system protection when there is something wrong with monitored items. As
for fan speed control, the F75363 can use PWM duty cycle output to automatically control fan speed. The fan speed
control is related to temperature variation. There is 8-step lookup table for users to program PWM duty cycle output to
control fan speed according to the temperature variation.
6.2
Access Interface
The F75363 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 F75363 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. F75363 supports 25ms timeout for no activity on
the SMBus. This timeout function is programmed at 22h bit7 and default is disabled. F75363 also supports Alert
Response Address (ARA) protocol.
The operation of the protocol is described with details in the following sections.
(a) SMBus write to internal address register followed by the data byte
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0
7
8
0
7
8
SCL
SDA
1
0
0
Start By
Master
1
1
0
0
R/W
D7
D6
Ack
by
363
Frame 1
Serial Bus Address Byte
D5
D4
D3
D2
D1
D0
Ack
by
363
Frame 2
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
7
8
0
7
8
SCL
SDA
1
0
Start By
Master
0
1
1
0
0
R/W
D7
D6
Ack
by
363
Frame 1
Serial Bus Address Byte
D5
D4
D3
D2
D1
D0
Ack
by
363
Frame 2
Internal Index Register Byte
Stop by
Master
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
1
SDA
0
Start By
Master
0
1
1
0
0
R/W
D7
D6
Ack
by
363
Frame 1
Serial Bus Address Byte
D5
D4
D3
D2
D1
D0
Ack
by
Master
Frame 2
Internal Index Register Byte
Stop by
Master
0
Figure 3. Serial Bus Read from Internal Address Register
(d) Alert Response Address
0
7
8
0
7
8
SCL
0
SDA
Start By
Master
0
0
1
1
0
0
R/W
0
Ack
by
363
Frame 1
Alert Response Address
1
0
0
1
Frame 2
Device Address
1
0
0
Ack
by
Master
Stop by
Master
0
Figure 4. Alert Response Address
6.3 Typical Operating Characteristics
(a) Temperature Error vs.D+/D- Capacitance
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temperature error(℃) vs. D+/D- capacitance
0
Temperature error(℃
-2
-4
-6
-8
-10
-12
-14
-16
-18
0
10
20
30
40
50 60 70 80
Capacitance(nf)
90
100 110 120 130
(b) Local Temperature Error vs. Die Temperature
Local Temperature error(℃)
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 Temperature Error vs. Die Temperature
Remote Temperature error(℃)
3
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
Temperature(℃)
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(d) Operating Supply Current vs. Conversion Rate
Operating current (uA)
FAN output Duty = 100%
FAN output Duty = 50%
Operating current (uA)
900
800
700
600
500
400
300
200
100
0
0.063 0.125 0.25
0.5
1
2
4
8
16
32
Conversion rate(Hz)
6.4 Temperature Monitoring
The F75363 monitors a local and a remote temperature sensor. Both can be measured from 0°C to 126.875°C.
The temperature format is as the following table:
Temperature ( High Byte )
Digital Output
Temperature ( Low Byte )
Digital Output
0°C
0000 0000
0°C
000 0 0000
1°C
0000 0001
0.125°C
001 0 0000
25°C
0001 1001
0.250°C
010 0 0000
50°C
0011 0010
0.375°C
011 0 0000
75°C
0100 1011
0.500°C
100 0 0000
90°C
0101 1010
0.625°C
101 0 0000
100°C
0110 0100
0.750°C
110 0 0000
126°C
0111 1110
0.875°C
111 0 0000
T
Remote-sensor transistor manufacturers
F75363
Manufacturer
Model Number
Panasonic
2SB0709 2N3906
Philips
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
F75363 ALERT# pin
Remote High Alert Status
TIME
6.4.2 Interrupt mode
The F75363’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 F75363 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
F75363 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 F75363 and F75363
receives the ARA command sent by the master, F75363 will send its address to the master. The F75363 will reset its
ALERT# output and set the ALERT Mask bit once the master acknowledges its response of device address. The master
may read F75363’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
F75363 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 F75363 provides a Fault Queue bit in Configuration Register (index 03h) to prevent false alert triggering. By setting
Fault Queue bit to a 1, the F75363 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
Name
Attribute
7
ALERT_MASK
R/W
Set to 1, mask ALERT# signal output.
6
RUN_STOP
R/W
Set to 0, monitor.
5
PWM_DIS_STBY
R/W
Set to 1, PWMOUT will be disabled while in standby. (when bit 6 is set to 1)
F75363
Description
Set to 1, stop monitor (in standby).
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Set to 0, the F75363’s PWM output continues to output the control signal while in
standby. (when bit 6 is set to 1)
4~3
Reserved
RO
2
ALERT_TACH_SEL
R/W
These bits are unused and always set to 0
Set to 1, pin6 is fan Tachometer input.
Set to 0, pin6 is ALERT output.
1
Reserved
RO
0
ALERT_QUEUE
R/W
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.
7.2 Status Register  Index 02h
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
Bit
Name
Attribute
7
ADC_BUSY
RO
6
T1_HIGH_STS
RO
T2 = Pin 2 external temperature sensor (Remote)
Description
Set to 1, ADC is converting.
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.
5
T1_LOW_STS
RO
Set to 0, T1 temperature does not goes below low limit.
Set to 1, T2 temperature exceeds high limit.
4
T2_HIGH_STS
RO
Set to 0, T2 temperature does not exceed high limit.
Set to 1, T2 temperature goes below low limit.
3
T2_LOW_STS
RO
Set to 0, T2 temperature does not goes below low limit.
Set to 1, T2 is open-circuit or shorted to VDD.
2
T2_OPEN_STS
RO
Set to 0, T2 is not open-circuit and not shorted to VDD.
Set to 1, T2 temperature exceeds its thermal limit.
1
T2_THERM_STS
RO
Set to 0, T2 temperature does not exceed its thermal limit.
Set to 1, FAN count is higher than the FAN limit value
0
FAN_ALARM
RO
Set to 0, FAN count is equal or lower than the FAN limit value.
7.3 Status Register  Index 18h
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
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T2 = Pin 2 external temperature sensor (Remote)
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Bit
Name
Attribute
T1_THERM_STS
RO
Description
Set to 1, T1 temperature exceeds its thermal limit.
7
Set to 0, T1 temperature does not exceed its thermal limit.
6-0
Reserved
RO
These bits are unused and always set to 0
7.4 Real-Time Status Register  Index 2Eh
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
Bit
Name
T2 = Pin 2 external temperature sensor (Remote)
Attribute
Description
7-3
Reserved
RO
These bits are unused and always set to 0
2
Reserved
RO
Fintek test mode used only
1
T2_THERM
RO
0
T1_THERM
RO
Set to 1, T2 temperature exceeds its thermal limit
This is a real-time event status
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
Set conversion times per second.
7-0
CONV_RATE
Value
Conversion/Sec
Value
Conversion/Sec
00h
0.0625
06h
4
01h
0.125
07h
8
02h
0.25
08h
16
03h
0.5
09h
32
04h
1
0Ah ~ FFh
Reserved
05h
2
R/W
7.6 Serial Interface Timeout Register  Index 22h
Power on default <7:0> = 00h
Bit
Name
Attribute
Description
7
EN_I2CTMOUT
R/W
Set to 1, enable serial interface timeout function. (25ms). Set to 0, disable.
6-0
Reserved
RO
These bits are unused and always set to 0
7.7 ALERT MASK Register 1  Index 16h
Power on default <7:0> = A4h
T1 = On-chip temperature sensor (Local)
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T2 = Pin 2 external temperature sensor (Remote)
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Bit
Name
Attribute
7
Reserved
RO
6
T1H_MASK
R/W
Description
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.
5
T1L_MASK
R/W
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.
4
T2H_MASK
R/W
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.
3
T2L_MASK
R/W
Set to 0, T2 temperature goes below low limit will generate an ALERT.
2
Reserved
RO
1
T2_THR_MASK
R/W
This bit is unused and always set to 1
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.
0
FAN_MASK
R/W
Set to 0, FAN count exceeds its limit will generate an ALERT.
7.8 ALERT MASK Register 2  Index 17h
Power on default <7:0> = 00h
T1 = On-chip temperature sensor (Local)
Bit
Name
7
T1_THR_MASK
T2 = Pin 2 external temperature sensor (Remote)
Attribute
Description
Set to 1, T1 temperature exceeds its thermal limit will not generate an ALERT.
R/W
Set to 0, T1 temperature exceeds its thermal limit will generate an ALERT.
6-0
Reserved
RO
Fintek test mode used only
7.9 PWM Control Register  Index 30h
Power on default <7:0> = 23h
Bit
Name
Attribute
Description
7
FTK_MODE
R/W
Select method of controlling PWM duty and frequency to FINTEK mode.
6
Reserved
RO
This bit is unused and always set to 0
When bit7 set to 0, tachometer input filter can be selected here.
2’b00: Filter time = 177.6us
5-4
FLT_SEL
R/W
2’b01: Filter time = 355.2us
2’b10: Filter time = 888us
2’b11: Filter time = 1.776ms
3
Reserved
RO
2
Reserved
R/W
F75363
This bit is unused and always set to 0
Fintek test mode used only
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Set to 1, select function of Pin4 to PWM output. (default)
1
PT_SEL
R/W
Set to 0, select function of Pin4 to THERM# output.
0
Reserved
R/W
Fintek test mode used only
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.
7
FTK_PWMCLK_SEL
R/W
Set to 1, PWM source clock is 200 kHz.
Set to 0 or 1 makes no different. PWM clock is divided by this value.
6-0
FTK_PREDIV
R/W
PWM clock = PWMOUT source clock/FTK_PREDIV
7.11 PWM Control and Fan Monitor Register Index 4Ah
Power on default <7:0> = 20h
Bit
7-6
Name
Reserved
Attribute
RO
Description
These bits are not used and always set to 0
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.
5
PWM_MODE
R/W
1: operates in MANUAL mode. Software set the PWMOUT duty-cycle directly. Look-up
table is programmable.
0: PWM output will be 0 V to turn off FAN and open (High-Z) to turn on fan.
4
PWM_INV
R/W
1: PWM output will be open to turn off FAN and 0 V to turn on fan.
0: PWMOUT frequency source is 333 kHz.
3
PWM_CLK_SEL
R/W
1: PWMOUT frequency source is 1.4 kHz.
2
Reserved
R/W
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.
F75363
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F75363
7.12 Fan Spin-Up Configuration Register  Index 4Bh
Power on default<7:0> = 3Fh
Bit
7-6
Name
Reserved
Attribute
These bits are not used and always set to 0.
RO
0: The spin-up time and duty depends on bit 4-0.
Fast Tachometer
5
Description
1: Sets the PWMOUT to 100% until the spin-up times out or the minimum RPM limit is
R/W
reached. When this bit is set, the spin-up duty cycle is always 100%.
Spin-up
If PWM spin up time (bit2-0) = 000, the spin-up process is bypassed.
00: No spin-up (unless bit5 is set to 0)
PWM Spin-Up Duty
4-3
01: 50%
R/W
10: 75%~81%. Depends on PWM frequency select.
Cycle
11: 100%.(default)
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
2-0
PWM Spin-Up Time
R/W
011: 1.5 second
100: 2.0 second
101: 2.5 second
110: 3.0 second
111: 3.5 second
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
7-0
PWM_DUTY
R/W
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.
7.14 FAN PWM Frequency Register  Index 4Dh
Power on default<7:0> =17h
Bit
Name
Attribute
7-5
Reserved
RO
4-0
PWM_FREQ
R/W
F75363
Description
These bits are unused and always set to 0
PWM frequency = PWM_CLK / 2n
(PWM_CLK = 333 kHz or 1.4 kHz , n = value of this register)
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F75363
7.15 Lookup Table Hysteresis Register  Index 4Fh
Power on default<7:0> = 04h
Bit
Name
Attribute
Description
7-5
Reserved
RO
These bits are unused and always set to 0
4-0
LOOKUP HYST
R/W
Lookup table hysteresis. (1LSB = 1°C)
7.16 Temperature vs. PWM Duty Lookup Table Registers  Index 50h to 5Fh
Power on default<7:0> = 7Fh and 3Fh
Index
Name
Description
Bits
7
50(52,54,56,58,
This bit is unused and always set to 0
TEMP(x)
5A,5C,5E)
6-0
51(53,55,57,59,
When T2 (external) temperature exceeds (greater than) this value, PWM output will be
the value of INDEX 5(y)h register.
7-6
These bits are unused and always set to 0
5-0
PWM output value corresponds to the temperature entry in INDEX 5(x)h.
DUTY(y)
5B,5D,5F)
7.17 ALERT Mode and Temperature Filter Control Register -- Index BFh
Power on default<7:0> = 00h
Bit
Name
Attribute
Description
7-3
Reserved
RO
These bits are unused and always set to 0
2-1
Reserved
R/W
Rewriteable register
0: ALERT# is INTERRUPT mode
Comparator
0
R/W
Mode
1: ALERT# is COMPARATOR mode
7.18 ARA Register --- Index FDh
Power on default: 0Ch (ARA address = 18h)
7.19 Vendor ID II (Manufacturer ID) Register  Index FEh
Power on default: 23h.
7.20 Version ID Register  Index FFh
Power on default: 20h.
7.21 Temperature and Fan Count Value Registers Index 10h- 2Fh
T1 = On-chip temperature sensor (Local)
F75363
T2 = Pin 2 external temperature sensor (Remote)
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July, 2007
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F75363
The value in quota is its power-on default value.
Description
Attribute
Address(High Byte)
Address (Low Byte)
T1 reading
RO
00h
1Ah
T2 reading
RO
01h
10h
T1 High Limit
R/W
05h/0Bh (46h)
1Bh (00h)
T1 Low Limit
R/W
06h/0Ch (00h)
1Ch (00h)
T2 High Limit
R/W
07h/0Dh (55h)
13h (00h)
T2 Low Limit
R/W
08h/0Eh (00h)
14h (00h)
T1 thermal limit
R/W
20h (55h)
T1 thermal Hysteresis
R/W
23h (0Ah)
T2 thermal limit
R/W
19h (64h)
T2 thermal Hysteresis
R/W
21h (0Ah)
FAN Tachometer Count
RO
47h (FFh)
46h (FFh)
FAN Tachometer Limit
R/W
49h (FFh)
48h (FFh)
8. PCB Layout Guide
PCB can be electrically noisy environments, and the F75363 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:
1. Place the F75363 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 switching power plane, clock
generators, CRTs, memory buses and PCI/ISA bus etc.
2. Route the D+ and 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+ & 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.
F75363
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July, 2007
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F75363
GND
10MILS
DXP
10MILS
DXN
10MILS
MINIMUM
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 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+ & 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
2200pF input filter capacitors across D+, D- close to the F75363.
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 0.5℃ error.
9. Electrical characteristic
9.1 Absolute Maximum Ratings
PARAMETER
Power Supply Voltage
F75363
RATING
UNIT
-0.5 to 5.5
V
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July, 2007
V0.27P
F75363
Input Voltage
-0.5 to VDD+0.5
V
Operating Temperature
0 to +140
°C
Storage Temperature
-55 to 150
°C
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
Temperature Error, Remote Diode
Conditions
MIN
60 oC < TD < 126 oC, VCC = 3.0V to 3.6V
o
0 C <TD < 60 C
Temperature Error, Local Diode
o
0 C < TA < 100 C, VCC = 3.0V to 3.6V
Supply Voltage range
Average operating supply current
3.0
±3
±1
±3
3.3
3.6
o
C
o
C
V
630
uA
0.0625 Conversions / Sec Rate
430
uA
30
uA
Resolution
o
0.125
VDD input, Disables ADC , Rising Edge
2.55
Power on reset threshold
Diode source current
±1
Unit
16 Conversions / Sec Rate
Standby supply current
Under-voltage lockout threshold
MAX
±1
o
o
TYP
2.2
C
V
2.4
V
High Level
95
uA
Low Level
10
uA
(TA = 0° C to 70° C, VDD = 3.3V ± 10%, VSS = 0V)
PARAMETER
SYM.
MIN.
TYP.
MAX.
UNIT
CONDITIONS
12
mA
VOL = 0.4V
0.8
V
VDD = 3.3V
2.4
V
VDD = 3.3V
POD12 –Pure open-drain output pin with sink capability of 12 mA
Output Low Current
INts
IOL
10
- TTL level Schmitt-triggered input pin
Input Low Threshold Voltage
Vt-
Input High Threshold Voltage
Vt+
Input High Leakage
ILIH
1
µA
VIN = VDD
Input Low Leakage
ILIL
1
µA
VIN = 0 V
F75363
0.4
2.0
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July, 2007
V0.27P
F75363
9.3 AC Characteristics
t
SCL
t
t
R
R
SCL
t HD;SDA
t
t
SU;DAT
SU;STO
SDA IN
VALID DATA
t
HD;DAT
SDA OUT
Serial Bus Timing Diagram
Serial Bus Timing
PARAMETER
SYMBOL
MIN.
MAX.
UNIT
t-SCL
0.5
10000
uS
Start condition hold time
tHD;SDA
0.5
uS
Stop condition setup-up time
tSU;STO
0.5
uS
DATA to SCL setup time
tSU;DAT
50
nS
DATA to SCL hold time
tHD;DAT
50
nS
SCL and SDA rise time
tR
0.4
uS
SCL and SDA fall time
tF
0.4
nS
SCL clock period
10. Ordering Information
F75363
Part Number
Package Type
Production Flow
F75363SG
8 pin SOP (Green Package)
Commercial, 0°C to +70°C
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July, 2007
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F75363
11. Package Dimensions
8
5
c
E
HE
L
4
1
0.25
D
O
A
Y
e
SEATING PLANE
GAUGE PLANE
A1
b
Control demensions are in milmeters .
SYMBOL
A
A1
b
c
E
D
e
HE
Y
L
θ
DIMENSION IN MM
MIN.
MAX.
1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
3.80
4.00
4.80
5.00
1.27 BSC
6.20
5.80
0.10
0.40
1.27
0
10
DIMENSION IN INCH
MIN.
MAX.
0.053
0.069
0.010
0.004
0.020
0.013
0.010
0.008
0.157
0.150
0.188
0.196
0.050 BSC
0.228
0.016
0
0.244
0.004
0.050
10
(F75363 8-SOP Package )
Feature Integration Technology Inc.
Headquarters
P
Taipei Office
3F-7, No 36, Tai Yuan St.,
Bldg. K4, 7F, No.700, Chung Cheng Rd.,
Chupei City, Hsinchu, Taiwan 302, R.O.C.
Chungho City, Taipei, Taiwan 235, R.O.C.
TEL : 886-3-5600168
TEL : 866-2-8227-8027
FAX : 886-3-5600166
FAX : 866-2-8227-8037
www: http://www.fintek.com.tw
l
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.
F75363
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July, 2007
V0.27P
10 Application Circuit
VCC3V
Example 1:
TEMPERATURE MONITOR (CPU THERMAL DIODE)
THERDA
VCC3V
D+
C1
3300pF
If use THERM# and ALERT#
PWM/THERM#
ALERT#/TACH
D-
C2
0.1u
R4 4.7K
R5 4.7K
R2
R3
4.7K
4.7K
THERDC
U1
D+
DPWM/THERM#
Example 2:
1
2
3
4
VCC
SCLK
D+
SDAT
DALERT#/TACH
PWM/THERM# GND
8
7
6
5
SCLK
SDATA
ALERT#/TACH
F75363
TEMPERATURE MONITOR (2N3906)
D+
VCC3V
Q1
2N3906
C3
3300pF
DR25
10K
PWM/THERM#R23
330
+12V
R18
4.7K
R19
4.7K
Q2
PNP
D1
Q3
NMOS
+12V
C8
JP1
+
47U
R20
4.7K
3
2
1
CON3
D2
ALERT#/TACH
R24
10K
C10
0.1U
FAN Circuit for High PWM Frequency
R30
3
2
1
27K
ALERT#/TACH
R28
10K
CON3
PWM/THERM#
27K
R21
4.7K
JP2
VCC3V
R22
C11
0.1U
R27
470
R26
10
Q4
NPN
Title
FAN Circuit for Low PWM Frequency
Size
A
Date:
-1-
Feature Integration Technology Inc.
Document Number
F75363 Application Circuit
Wednesday , January 26, 2005
Rev
0.1
Sheet
1
of
1
July, 2007
V0.27P