MAX31785 MAXIM [Maxim Integrated Products], MAX31785 Datasheet - Page 10

• Manufacturer Part Number: MAX31785
• Description: 6-Channel Intelligent Fan Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

6-Channel Intelligent Fan Controller
10
2, 21, 36
PIN
10
11
12
13
14
15
16
17
18
19
1
3
4
5
6
7
8
9
TACH5
TACH4
NAME
PWM5
PWM4
MSDA
MSCL
RS+4
RS+3
RS+0
RS+1
RS+2
RS-4
RS-3
RS-0
RS-1
RS-2
V
RST
V
DD
SS
Ground Reference for Thermal Diode or Remote Voltage ADC4 Measurement
Digital-Supply Return Node (Ground)
Thermal Diode or Remote Voltage ADC Input, Measurement Relative to RS-4
Ground Reference for Thermal Diode or Remote Voltage ADC3 Measurement
Thermal Diode or Remote Voltage ADC Input, Measurement Relative to RS-3
Thermal Diode or Remote Voltage ADC Input, Measurement Relative to RS-0
Ground Reference for Thermal Diode or Remote Voltage ADC0 Measurement
Thermal Diode or Remote Voltage ADC Input, Measurement Relative to RS-1
Supply Voltage. Bypass V
Ground Reference for Thermal Diode or Remote Voltage ADC1 Measurement
Thermal Diode or Remote Voltage ADC Input, Measurement Relative to RS-2
Ground Reference for Thermal Diode or Remote Voltage ADC2 Measurement
Reset Active-Low Input
Master I
Master I
Fan PWM Output #5. CMOS push-pull output. Low when the fan is disabled. A 100% duty cycle
implies this pin is continuously high.
Fan Tachometer Input
Fan PWM Output #4. CMOS push-pull output. Low when the fan is disabled. A 100% duty cycle
implies this pin is continuously high.
Fan Tachometer Input
TOP VIEW
A1/TACHSEL
CONTROL
2
2
C Data Input/Output. Open-drain output.
C Clock Input/Output. Open-drain output.
FAULT
ALERT
RS+5
RS-5
SDA
SCL
V
A0
SS
31
32
33
34
35
36
37
38
39
40
30
1
29
(6mm × 6mm × 0.75mm)
2
+
28
DD
3
27
to V
4
MAX31785
TQFN
26
SS
5
25
with a 0.1FF capacitor.
6
24 23 22
7
EP
8
FUNCTION
9
10
21
20 PWM3
19
18
17
16
15
14
13
12
11
TACH4
PWM4
TACH5
PWM5
MSCL
MSDA
RST
RS-2
RS+2
Pin Configuration
Pin Description