Datasheet

6-Channel Intelligent Fan Controller
MAX31785
47
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”,
or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Typical Operating Circuit
PWM0
MSDA
MSCL
+3.3V
V
DD
V
SS
SDA
SCL
6 CHANNELS
UP TO 4
CHANNELS
TACH0
RS+0
RS-0
PWM1
TACH1
RS+1
RS-1
PWM2
TACH2
RS+2
RS-2
PWM3
TACH3
RS+3
RS-3
PWM4
TACH4
RS+4
RS-4
PWM5
TACH5
RS+5
RS-5
REMOTE
TEMPERATURE
DIODE
EACH CHANNEL
CAN READ A REMOTE
TEMPERATURE DIODE
OR A REMOTE VOLTAGE
REMOTE
VOLTAGE
RST
ALERT
FAULT
A0
HOST
INTERFACE
I
2
C TEMP
SENSOR
CONTROL
REG18
A1/TACHSEL
REG25
MAX31785
DS75LV
SPDT
MUX
FROM
TACHSEL
OPTIONAL
SUPPORT FOR
TWO FANS
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
40 TQFN-EP T4066+2
21-0141 90-0053