Datasheet 91
Boxed Processor Specifications
Figure 26. Boxed Processor Fan Heatsink Power Cable Connector Description
Table 32. Fan Heatsink Power and Signal Specifications
Description Min Typ Max Unit Notes
+12 V: 12 volt fan power supply 11.4 12 12.6 V -
IC:
- Maximum fan steady-state current draw
- Average fan steady-state current draw
- Maximum fan start-up current draw
- Fan start-up current draw maximum
duration
—
—
—
—
1.2
0.5
2.2
1.0
—
—
—
—
A
A
A
Second
-
SENSE: SENSE frequency — 2 —
pulses per
fan
revolution
1
NOTES:
1. Baseboard should pull this pin up to 5 V with a resistor.
CONTROL 21 25 28 Hz
2, 3
2. Open drain type, pulse width modulated.
3. Fan will have pull-up resistor to 4.75 V maximum of 5.25 V.
Pin
Signal
12
34
1
2
3
4
GND
+12 V
SENSE
CONTROL
Straight square pin, 4-pin terminal housing with
polarizing ribs and friction locking ramp.
0.100" pitch, 0.025" square pin width.
Match with straight pin, friction lock header on
mainboard.
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