Rainbow Electronics MAX6678 - Manual (Page 17)

MAX6678
2-Channel Temperature Monitor with Dual Automatic
PWM Fan-Speed Controller and Five GPIOs
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20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
V
CC
PWMOUT1
GPIO0
OT SMBCLK
SMBDATA
PRESET3
PWMOUT2
TOP VIEW
GPIO1
GPIO2
GPIO3
PRESET0 DXN
DXP1
PRESET4
GPIO4
12
11
9
10
PRESET1
PRESET2 GND
DXP2
MAX6678
QSOP
Pin Configurations (continued) Chip Information
TRANSISTOR COUNT: 23,618
PROCESS: BiCMOS
REMOTE 1
CPU
GPU
REMOTE 2
TO SMBus
MASTER
3.0V TO 5.5V
3.0V TO 5.5V 3.0V TO 5.5V
3.0V TO 5.5V
3.0V TO 5.5V
3.0V TO 5.5V
5.0V
V FAN (5V OR 12V)
5V
V FAN (5V OR 12V)
3.0V TO 5.5V
MAX6678
DXP1
DXN
DXP2
SMBDATA
SMBCLK
GPIO3
GPIO4 GPIO2
GPIO1
GPIO0
OT
PWMOUT2
PWMOUT1
V CC
5
GND PRESET_
TO CLOCK THROTTLE OR
SYSTEM SHUTDOWN
Typical Application Circuit