General Description

The MAX6655/MAX6656 are precise voltage and temperature monitors. The digital thermometer reports the temperature of two remote sensors and its own die temperature. The remote sensors are diode-connected transistors—typically a low-cost, easily mounted 2N3906 PNP type—that replace conventional thermis tors or thermocouples. Remote accuracy is ±1°C for multiple transistor manufacturers with no calibration necessary. The remote channels can also measure the

die temperature of other ICs, such as microprocessors, that contain a substrate-connected PNP with its collector grounded and its base and emitter available for temperature-sensing purposes. The temperature is digitized with 11-bit resolution.

Features

♦Three Temperature Channels Two Remote PN Junctions One Local Sensor

♦Four Voltage Channels

+12V, +5V, +3.3V, +2.5V

Three External Monitors

One Internal Supply Monitor

♦11-Bit, 0.125°C Resolution

♦High Accuracy: ±1°C Over +60°C to +100°C Temperature Range

♦Programmable Under/Over-Threshold Alarms

♦Programmable Power-Saving Mode

♦No Calibration Required

♦SMBus/I2C-Compatible Interface