Datasheet

LM63
1
2
3
4 5
6
7
8
2.2 nF
+3.3 VDC from motherboard
SMBCLK
SMBDAT
PWM Output
To SMBus
interface
control
circuitry
ALERT / Tach
GND
VDD
D+
D-
PWM
Remote diode-
connected transistor
inside of an Intel®
Pentium® 4 Processor
ALERT to system
shutdown circuitry
+3.3 VDC
470
MMBT2222A
Tach. input
from Fan
Fan voltage
+12 or +5 VDC
10k
13k
1k
0.2W
Tach In
0.1
100 pF
10 PF
These two capacitors
are close to Pin 1
DC brushless
fan module with
Tachometer
Fan V+
Fan V-
10
Processor
LM63
SNAS190E –SEPTEMBER 2002–REVISED MAY 2013 www.ti.com
TYPICAL APPLICATION
Figure 3.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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