General Description

The MAX16016/MAX16020/MAX16021 supervisory circuits monitor power supplies, provide battery-backup control, and chip-enable (CE) gating to write protect memory in microprocessor (µP)-based systems. These low-power devices improve system reliability by providing several supervisory functions in a small, single integrated solution.

Features

♦ System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V

   Power-Supply Voltages

♦ 1.53V to 5.5V Operating Voltage Range

♦ Low 1.2µA Supply Current (0.25µA in Battery

   Backup Mode)

♦ 145ms (min) Reset Timeout Period

♦ Battery Freshness Seal

♦ On-Board Gating of CE Signals, 1.5ns

   Propagation Delay (MAX16020/MAX16021)

♦ Debounced Manual Reset Input

♦ Watchdog Timer, 1.2s (typ) Timeout

♦ Power-Fail Comparator and Low-Line Indicator for

   Monitoring Voltages Down to 0.6V

♦ Battery-On, Battery-OK, and Battery Test

   Indicators

♦ Small 10-Pin TDFN or 16-Pin TQFN Packages

♦ UL®-Certified to Conform to IEC 60950-1

Applications

   Main/Backup Power for RTCs, CMOS Memories

   Industrial Control

   GPS Systems

   Set-Top Boxes

   Point-of-Sale Equipment

   Portable/Battery Equipment