Datasheet

LM96000
www.ti.com SNAS234C –APRIL 2004–REVISED MARCH 2013
Pin Descriptions
Name Pin No. Type Name and Function/Connection
SMBDAT 1 Digital I/O System Management Bus Data. Open-drain output. 5V tolerant, SMBus
(Open-Drain) 2.0 compliant.
SMBus
SMBCLK 2 Digital Input System Management Bus Clock. Tied to Open-drain output. 5V tolerant,
SMBus 2.0 compliant.
VID0 5 Digital Input Voltage identification signal from the processor. This value is read in the
VID0–VID4 Status Register.
VID1 6 Digital Input Voltage identification signal from the processor. This value is read in the
VID0–VID4 Status Register.
Processor VID2 7 Digital Input Voltage identification signal from the processor. This value is read in the
VID Lines VID0–VID4 Status Register.
VID3 8 Digital Input Voltage identification signal from the processor. This value is read in the
VID0–VID4 Status Register.
VID4 19 Digital Input Voltage identification signal from the processor. This value is read in the
VID0–VID4 Status Register.
3.3V 4 POWER +3.3V pin. Can be powered by +3.3V Standby power if monitoring in low
power states is required. This pin also serves as the analog input to
monitor the 3.3V supply. This pin should be bypassed with a 0.1µf
Power
capacitor in parallel with 100pf. A bulk capacitance of approximately 10µf
needs to be in the near vicinity of the LM96000.
GND 3 GROUND Ground for all analog and digital circuitry.
5V 20 Analog Input Analog input for +5V monitoring.
12V 21 Analog Input Analog input for +12V monitoring.
Voltage
Inputs
2.5V 22 Analog Input Analog input for +2.5V monitoring.
VCCP_IN 23 Analog Input Analog input for VCCP (processor voltage) monitoring.
Remote1+ 18 Remote Thermal Positive input (current source) from the first remote thermal diode.
Diode Positive Serves as the positive input into the A/D. Connected to THERMDA pin of
Input Pentium processor or the base of a diode connected MMBT3904 NPN
transistor.
Remote1− 17 Remote Thermal Negative input (current sink) from the first remote thermal diode. Serves
Diode Negative as the negative input into the A/D. Connected to THERMDC pin of
Input Pentium processor or the emmiter of a diode connected MMBT3904
NPN transistor.
Remote
Diodes
Remote2+ 16 Remote Thermal Positive input (current source) from the first remote thermal diode.
Diode Positive Serves as the positive input into the A/D. Connected to THERMDA pin of
Output Pentium processor or the base of a diode connected MMBT3904 NPN
transistor.
Remote2− 15 Remote Thermal Negative input (current sink) from the first remote thermal diode. Serves
Diode Negative as the negative input into the A/D. Connected to THERMDC pin of
Input Pentium processor or the emmiter of a diode connected MMBT3904
NPN transistor.
TACH1 11 Digital Input Input for monitoring tachometer output of fan 1.
TACH2 12 Digital Input Input for monitoring tachometer output of fan 2.
Fan
Tachometer
TACH3 9 Digital Input Input for monitoring tachometer output of fan 3.
Inputs
TACH4/Address 14 Digital Input Input for monitoring tachometer output of fan 4. If in Address Select
Select Mode, determines the SMBus address of the LM96000.
PWM1/xTest Out 24 Digital Open-Drain Fan speed control 1. When in XOR tree test mode, functions as XOR
Output Tree output.
PWM2 10 Digital Open-Drain Fan speed control 2.
Fan Control
Output
PWM3/Address 13 Digital Open-Drain Fan speed control 3. Pull to ground at power on to enable Address
Enable Output Select Mode (Address Select pin controls SMBus address of the device).
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Copyright © 2004–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: LM96000