f75384s Feature Integration Technology Inc., f75384s Datasheet - Page 7

• Manufacturer Part Number: f75384s
• Description: ?1o C Accuracy Temperature Sensor Ic Datasheet
• Manufacturer: Feature Integration Technology Inc.

F75383/F75384
6. Functional Description
PIN NO
6.1 General Description
6.2 The warning message
6.3 Access Interface
1
2
3
4
5
6
7
8
The F75383/F75384 is a simple temperature sensor with warning signal output. It includes a local and a remote temperature sensor.
Both measured temperature are compared with its high, low and THERM limits which are stored in the registers. When one or more
out-of-limit events occur, the flags in Status Register will be set and that may cause ALERT output to low. Also, measured
temperature exceeding THERM limit may cause THERM output to low.
Pin4 and pin6 act as warning message when the temperature exceeds it threshold point.
The F75383/F75384 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 F75383/F75384 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. F75383/F75384 supports 25ms timeout for no activity on the SMBus. This timeout function is
programmed at 22h bit7 and default is disabled. F75383/F75384 also supports Alert Response Address(ARA) protocol.
The operation of the protocol is described with details in the following sections.
VCC
D+
D-
THERM#
GND
ALERT#
SDA
SCL
PIN NAME
IN
PWR
PWR
TYPE
OD
OD
ts
IN
AIN
AIN
/OD
t s
12
12
12
3VCC
3VCC
3VCC
3VCC
3VCC
3VCC
3VCC
3VCC
PWR
Power Pin
Positive connection to remote temperature sensor (ex: thermal diode anode)
Negative connection to remote temperature sensor(ex: thermal diode
cathode)
Active LOW output. This pin will be logic low when the temperature exceeds
its limit.
Ground
Active LOW output. Used as SMBus alert or Interrupt
Serial bus data
Serial bus clock
-3-
DESCRIPTION
F75383/F75384
July, 2007
V0.32P