Datasheet

Boxed Processor Specifications
98 Datasheet
The power header on the baseboard must be positioned to allow the fan heatsink power
cable to reach it. The power header identification and location should be documented in
the platform documentation, or on the system board itself. Figure 22 shows the
location of the fan power connector relative to the processor socket. The baseboard
power header should be positioned within 4.33 inches from the center of the processor
socket.
NOTES:
1. Baseboard should pull this pin up to 5 V with a resistor.
2. Open Drain Type, Pulse Width Modulated.
3. Fan will have a pull-up resistor to 4.75 V, maximum is 5.25 V.
Figure 21. Boxed Processor Fan Heatsink Power Cable Connector Description
Table 34. Fan Heatsink Power and Signal Specifications
Description Min Typ Max Unit Notes
+12V: 12 volt fan power supply 10.2 12 13.8 V -
IC:
Peak Fan current draw
Fan start-up current draw
Fan start-up current draw maximum duration
—
—
—
1.1
—
—
1.5
2.2
1.0
A
A
Second
-
SENSE: SENSE frequency — 2 —
pulses per
fan
revolution
1
CONTROL 21 25 28 kHz 2,3
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.