General Description

Maxim’s MAX8211 and MAX8212 are CMOS micropower voltage detectors that warn microprocessors (µPs) of power failures. Each contains a comparator, a 1.5V bandgap reference, and an open-drain n-channel output driver. Two external resistors are used in conjunction with the internal reference to set the trip voltage to the desired level. A hysteresis output is also included, allowing the user to apply positive feedback for noise-free output switching.

Features

♦ µP Power-Fail Warning

♦ Improved 2nd Source for ICL8211/ICL8212

♦ Low-Power CMOS Design

♦ 5µA Quiescent Current

♦ On-Board Hysteresis Output

♦ ±40mV Threshold Accuracy (±3.5%)

♦ 2.0V to 16.5V Supply-Voltage Range

♦ Define Output Current Limit (MAX8211)

♦ High Output Current Capability (MAX8212)

Applications

  µP Voltage Monitoring

  Undervoltage Detection

  Overvoltage Detection

  Battery-Backup Switching

  Power-Supply Fault Monitoring

  Low-Battery Detection