Intel III 450 MHz 80525PY450512 Data Sheet
Product codes
80525PY450512
Datasheet
91
Boxed Processor Specifications
Baseboards designed to accept both Pentium II processors and Pentium III processors have
component height restrictions for passive heatsink support designs, as described in AP-588,
Mechanical and Assembly Technology for S.E.C. Cartridge Processors (Document Number
243333).
component height restrictions for passive heatsink support designs, as described in AP-588,
Mechanical and Assembly Technology for S.E.C. Cartridge Processors (Document Number
243333).
6.3
Fan Heatsink Electrical Requirements
6.3.1
Fan Heatsink Power Supply
The boxed processor's fan heatsink requires a +12 V power supply. A fan power cable will be
shipped with the boxed processor to draw power from a power header on the baseboard. The power
cable connector and pinout are shown in
shipped with the boxed processor to draw power from a power header on the baseboard. The power
cable connector and pinout are shown in
. Baseboards must provide a matched power
contains specifications for the input and output
signals at the fan heatsink connector. The cable length will be 7.0 ±0.25 inches. The fan heatsink
outputs a SENSE signal, which is an open-collector output, that pulses at a rate of two pulses per
fan revolution. A baseboard pull-up resistor (~12 k
outputs a SENSE signal, which is an open-collector output, that pulses at a rate of two pulses per
fan revolution. A baseboard pull-up resistor (~12 k
Ω
) provides V
OH
to match the baseboard-
mounted fan speed monitor requirements, if applicable. Use of the SENSE signal is optional. If the
SENSE signal is not used, pin 3 of the connector should be tied to GND.
SENSE signal is not used, pin 3 of the connector should be tied to GND.
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 baseboard
documentation, or on the baseboard itself.
reach it. The power header identification and location should be documented in the baseboard
documentation, or on the baseboard itself.
shows the location of the fan power connector
relative to the 242-contact slot connector. The baseboard power header should be positioned within
4.75 inches (lateral) of the fan power connector.
4.75 inches (lateral) of the fan power connector.
Figure 54. Intel
®
Boxed Processor Fan Heatsink Power Cable Connector Description
Table 39. Fan Heatsink Power and Signal Specifications
Description
Min
Typ
Max
+12 V: 12 volt fan power supply
9 V
12 V
13.8 V
I
C
: Fan current draw
100 mA
Ics: Fan sense signal current
10 mA
SENSE: SENSE frequency (baseboard should pull this
pin up to appropriate V
pin up to appropriate V
CC
with resistor)
2 pulses per
fan revolution
Pin
Signal
Straight square pin, 3-pin terminal housing with
polarizing ribs and friction locking ramp.
polarizing ribs and friction locking ramp.
0.100" pin pitch, 0.025" square pin width.
Waldom/Molex P/N 22-01-3037 or equivalent.
Match with straight pin, friction lock header on motherboard
Waldom/Molex P/N 22-23-2031, AMP P/N 640456-3,
or equivalent.
Waldom/Molex P/N 22-23-2031, AMP P/N 640456-3,
or equivalent.
1
2
3
GND
+12V
SENSE
1
2
3