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MAX31782：System Management Microcontroller

Industry's First Microcontroller with Six Independent Channels of Closed-Loop Fan Control

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 system for temperature and voltage, PWM outputs, timer inputs, and GPIO to support monitoring and controlling critical system parameters such as temperature, voltage, fan speed, and chassis intrusion. Direct connection of diode-connected transistors used as remote temperature 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 communication 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 integrated 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. Designers must have the following documents to fully use all the features of this device. The data sheet contains pin descriptions, feature overviews, and electrical specifications. Errata sheets contain deviations from published specifications. The user’s guides offer detailed information about device features and operation. MAX31782 IC data sheet MAX31782 revision-specific errata sheet (Click here for availability) MAX31782 User's Guide

Key Features MAXQ20, High-Performance, 16-Bit µC Efficient C-Language Programming 36KWords Total Program Memory 32KWords Flash Program Memory 4KWords ROM Program Memory 1KWords Data RAM 12-Bit ADC with 7-Input Mux for Temperature and Voltage Monitoring Temperature Measurement Analog Front-End 0.125°C Resolution Diode Series Resistance Cancellation Six Timer/Fan Tachometer Inputs Six 16-Bit PWM Outputs for Fan Speed or D/A Applications 5-Bit GPIO Ports SMBus/I²C-Compatible Slave Interface for Host Communication with Password-Protected Flash Programming I²C-Compatible Master Interface for Slave Expansion Power-On Reset and Brownout Monitors JTAG Port Supports In-System Debug and Flash Programming Internal Oscillator Requires No Crystal 2.7V to 5.5V Operating Voltage Range

MAX31782: Typical Operating Circuit Applications/Uses Base Stations Network Switches/Routers Servers Smart Grid Network Systems

DataSheet

Parametrics

Quality and Environmental Data

• MAX31782.pdf

Ordering Information