Symbol
Pin #
Type
Function
RESET
21
Digital I/O (Open-
Drain)
Open-drain reset output when power is first applied to the LM96194. Used
as a reset for devices powered by 3.3V stand-by. After reset, this pin
becomes a reset input. See Section (TBD) for more information. If this pin
is not used, connection to an external resistive pull-up is required to prevent
LM96194 malfunction.
AGND
22
GROUND Input
Analog Ground. All grounds need to be tied together at the chip then taken
to a low noise system ground. A voltage difference between grounds may
cause erroneous results.
REMOTE1
23
Remote Thermal
Diode_1- Input (CPU
THERMDC)
This is the negative input (current sink) from both of the CPU thermal
diodes. Connected to THERMDC pin of Pentium processor or the emitter
of a diode connected MMBT3904 NPN transistor. Serves as the negative
input into the A/D for thermal diode voltage measurements. A 100 pF
capacitor is optional and can be connected between REMOTE1 and
REMOTE1+.
REMOTE1a+
24
Remote Thermal
Diode_1a+ I/O (CPU
THERMDA1)
This is a positive connection to the first CPU thermal diode. Serves as the
positive input into the A/D for thermal diode voltage measurements. It also
serves as a current source output that forward biases the thermal diode.
Connected to THERMDA pin of Pentium processor or the base of a diode
connected MMBT3904 NPN transistor. A 100 pF capacitor is optional and
can be connected between REMOTE1 and each REMOTE1+.
REMOTE2
25
Remote Thermal
Diode_2 - Input
This is the negative input (current sink) from both of the CPU2 thermal
diodes. Connected to THERMDC pins of Pentium processor or the emitter
of a diode connected MMBT3904 NPN transistor. Serves as the negative
input into the A/D for thermal diode voltage measurements. A 100 pF
capacitor is optional and can be connected between REMOTE2 and each
REMOTE2+.
REMOTE2a+
26
Remote Thermal
Diode_2a + I/O
This is a positive connection to the third thermal diode. Serves as the
positive input into the A/D for thermal diode voltage measurements. It also
serves as a current source output that forward biases the thermal diode.
Connected to THERMDA pin of Pentium processor or the base of a diode
connected MMBT3904 NPN transistor. A 100 pF capacitor is optional and
can be connected between REMOTE2 and REMOTE2+.
AD_IN1/REMOTE1b+
27
Analog Input (+12V1 or
CPU1 THERMDA2)
Analog Input for +12V Rail 1 monitoring, for CPU1 voltage regulator.
External attenuation resistors required such that 12V is attenuated to
0.927V for nominal scale reading. This pin may also serve as the second
positive thermal diode input for the CPU.
AD_IN2/REMOTE2b+
28
Analog Input or
Remote Thermal
Diode_2b + I/O
Analog Input for +12V Rail 2 monitoring. External attenuation resistors
required such that 12V is attenuated to 0.927V for nominal scale reading.
This pin may also serve as the fourth positive thermal diode input.
AD_IN3
29
Analog Input (+12V3)
Analog Input for +12V Rail 3, for Memory/3GIO slots. External attenuation
resistors required such that 12V is attenuated to 0.927V for nominal scale
reading.
AD_IN4 (Vccp)
30
Analog Input
(CPU1_Vccp)
Analog input for +Vccp (processor voltage) monitoring.
AD_IN5
31
Analog Input (+3.3V)
Analog input for +3.3V monitoring, nominal scale reading
GND
32
Ground
All grounds need to be tied together at the chip then taken to a low noise
system ground. A voltage difference between grounds may cause
erroneous results.
GND
33
Ground
All grounds need to be tied together at the chip then taken to a low noise
system ground. A voltage difference between grounds may cause
erroneous results.
GND
34
Ground
All grounds need to be tied together at the chip then taken to a low noise
system ground. A voltage difference between grounds may cause
erroneous results.
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LM96194