MAX31782 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – System Management Microcontroller

19-5327; Rev 0; 6/10
System Management Microcontroller
General Description
The MAX31782 provides a complete solution for the
monitoring and controlling of complex system physical
health characteristics based on a high-performance,
MAXQ20, 16-bit microcontroller core with generous
amounts of flash program/data and RAM data memory.
I/O resources include an accurate measurement sys-
tem for temperature and voltage, PWM outputs, timer
inputs, and GPIO to support monitoring and controlling
critical system parameters such as temperature, volt-
age, fan speed, and chassis intrusion. Direct connection
of diode-connected transistors used as remote tem-
perature sensors is supported as well as expansion to a
virtually unlimited number of external digital temperature
sensor ICs using the on-chip master I²C interface. An
independent slave I²C interface facilitates communica-
tion to a host microprocessor in addition to password-
protected in-system reprogramming of the on-chip flash.
Ease of development is supported with highly versatile
C-compilers and development software that programs
flash and performs in-circuit debug through the inte-
grated JTAG interface and associated hardware.
All these features combined make the device a highly
flexible platform, allowing the designer to easily create a
customized complex system management solution.
Applications
Network Switches/Routers
Base Stations
Servers
Smart Grid Network Systems
Typical Operating Circuit appears at end of data sheet.
Features
S MAXQ20, High-Performance, 16-Bit µC
S Efficient C-Language Programming
S 36KWords Total Program Memory
32KWords Flash Program Memory
4KWords ROM Program Memory
S 1KWords Data RAM
S 12-Bit ADC with 7-Input Mux for Temperature and
Voltage Monitoring
S Temperature Measurement Analog Front-End
0.125NC Resolution
Diode Series Resistance Cancellation
S Six Timer/Fan Tachometer Inputs
S Six 16-Bit PWM Outputs for Fan Speed or D/A
Applications
S 5-Bit GPIO Ports
S SMBus™/I²C-Compatible Slave Interface for Host
Communication with Password-Protected Flash
Programming
S I²C-Compatible Master Interface for Slave
Expansion
S Power-On Reset and Brownout Monitors
S JTAG Port Supports In-System Debug and Flash
Programming
S Internal Oscillator Requires No Crystal
S 2.7V to 5.5V Operating Voltage Range
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX31782ETL+
-40NC to +85NC 40 TQFN-EP*
MAX31782ETL+T
-40NC to +85NC 40 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
SMBus is a trademark of Intel Corp.
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, go to: www.maxim-ic.com/errata.
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