Datasheet

MAX6653/MAX6663/MAX6664
Temperature Monitors and
PWM Fan Controllers
22 ______________________________________________________________________________________
16
1
2
3
4
5
6
PWM_OUT
SMBCLK
MAX6663
MAX6664
TACH/AIN
N.C.
V
CC
N.C.
+3.3V
10k
Ω
10k
Ω
10k
Ω
NDT3055L
THERM SIGNAL
TO THROTTLE
CPU CLOCK
FAN _FAULT
TO SIGNAL
FAN-FAILURE
CONDITION
10k
Ω
+3.3V
+3.3V
3-WIRE
FAN
+5V+3.3V
+3.3V
GND
THERM
FAN_FAULT
7
8
15
SMBDATA
10k
Ω
2.2k
Ω
2.2k
Ω
+3.3V
+3.3V
+3.3V
14
13
INT
ADD
2.2nF
INTERRUPT
TO
µ
C
CLOCK
DATA
+3.3V
12
N.C.
N.C.
11
10
DXP
9
DXN
CPU
Typical Operating Circuits (continued)