MAX31785 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX31785 Datasheet PDF : 48 Pages
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6-Channel Intelligent Fan Controller
TOP VIEW
30 29 28 27 26 25 24 23 22 21
SDA 31
20 PWM3
SCL 32
19 TACH4
A0 33
18 PWM4
FAULT 34
17 TACH5
CONTROL 35
VSS 36
A1/TACHSEL 37
MAX31785
16 PWM5
15 MSCL
14 MSDA
ALERT 38
+
RS-5 39
EP
13 RST
12 RS-2
RS+5 40
11 RS+2
1 2 3 4 5 6 7 8 9 10
TQFN
(6mm × 6mm × 0.75mm)
Pin Configuration
PIN
1
2, 21, 36
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
10
NAME
RS-4
VSS
RS+4
RS-3
RS+3
RS+0
RS-0
RS+1
VDD
RS-1
RS+2
RS-2
RST
MSDA
MSCL
PWM5
TACH5
PWM4
TACH4
Pin Description
FUNCTION
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 VDD to VSS with a 0.1FF capacitor.
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 I2C Data Input/Output. Open-drain output.
Master I2C Clock Input/Output. Open-drain output.
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
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