Rainbow Electronics MAX6645 - Manual (Page 10)

MAX6643/MAX6644/MAX6645
Automatic PWM Fan-Speed Controllers with
Overtemperature Output
10 ______________________________________________________________________________________
TO FANFAIL
ALARM
MAX6645
10
N
9
8
TACHOMETER
MODE
TACHOMETER
MODE
TO OVERTEMPERATURE ALARM
7
6
FANFAIL
TACHSET
DXP2
GND
DXP1
V DD
V
DD
(+3.0V TO +5.5V)
+V
FAN
(5V OR 12V)
1
2
3
4
5
PWM_OUT
FAN_IN1
FAN_IN2
OT
4.7k Ω
4.7k Ω
4.7k Ω
Figure 5. Using the MAX6645 to Monitor Two Fans