Intel E5400 AT80571PG0682ML Data Sheet

94

Datasheet

The boxed processor's fanheat sink requires a constant +12 V supplied to pin 2 and 

does not support variable voltage control or 3-pin PWM control. 

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. 

 shows the 

location of the fan power connector relative to the processor socket. The baseboard 

power header should be positioned within 110 mm [4.33 inches] from the center of the 

processor socket.

+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

1. Baseboard should pull this pin up to 5 V with a resistor.

CONTROL

21

25

28

kHz

2, 3

2. Open drain type, pulse width modulated.

3. Fan will have pull-up resistor for this signal to maximum of 5.25 V.

Pin Signal

1 2 3 4

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.