company blog about Mingjiada Supply Maxim MAX6639 Series Dual Channel Temperature Monitor

Shenzhen Mingjiada Electronics Co., Ltd. — Long-term supplier of the [Maxim] MAX6639 series dual-channel temperature monitors. This series of devices incorporates a built-in local temperature sensor and two sets of remote diode-connected transistor (DCT) temperature sensing channels, enabling simultaneous monitoring of the temperature status of heat sources such as processors, FPGAs and GPUs.

[Maxim] MAX6639 — 2-channel temperature monitor, providing dual-channel, automatic PWM fan speed control

The MAX6639 can monitor its own temperature and the temperature of either one or two transistors connected externally as diodes; such transistors are typically integrated into CPUs, FPGAs or GPUs. The 2-wire serial interface utilises the standard System Management Bus (SMBus™), supporting write-byte, read-byte, send-byte and receive-byte commands to read temperature data and set alarm thresholds. Temperature data can be read at any time via SMBus, whilst three programmable alarm outputs are provided to generate interrupt, disable or high-temperature shutdown signals. The MAX6639 is available in 16-pin QSOP and 16-pin low-profile QFN, 5mm × 5mm packages. It operates from a supply voltage of 3.0V to 3.6V and consumes only 500µA of supply current.

MAX6639 Product Features:

Two thermistor inputs

PWM output frequency up to 25 kHz

Three selectable SMBus addresses

Local temperature sensing

1°C remote temperature measurement accuracy

Two PWM outputs for fan drive (open-drain, pull-up to +13.5 V)

Programmable fan control

Automatic fan rotation ensures fan start-up

Controlled speed variation ensures smooth fan speed regulation

±3% fan speed measurement accuracy

Temperature monitoring commences at Power-On Reset (POR) with system failure protection

/OT and /THERM outputs for inhibit or shutdown control

Temperature measurement up to +150°C

With its dual-channel remote temperature sensing and fan control capabilities, the MAX6639 series is widely used in:

Servers and data centre equipment: monitoring CPU, memory module and board temperatures to enable intelligent thermal management.

Communications base stations and network equipment: ensuring critical components such as RF power amplifiers and optical modules operate within safe temperature ranges.

Industrial control and automation: providing over-temperature protection and fan management for industrial control motherboards and power supply modules.

High-end graphics cards and FPGA development boards: real-time monitoring of core chip temperatures to prevent thermal failure.

Medical electronics and test instruments: precision thermal management for temperature-sensitive equipment.

Availability Information

Shenzhen Mingjiada Electronics Co., Ltd. — a long-standing distributor of the Maxim product range. The MAX6639 series of temperature monitors (including models such as MAX6639AEE, MAX6639ATE, MAX6639FAEE and MAX6639FATE) are always in stock, with support for samples, small-batch purchases and full-reel supply. To confirm specific batch numbers, stock levels and real-time prices, please contact Mingjiada Electronics directly for a quotation.

Company URL: https://www.integrated-ic.com/