Description

The MAX819LCPA is a microprocessor (µP) supervisory circuit designed for use in +5V-powered systems. It simplifies power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required. With low supply current and a small package size, it is ideal for portable applications. The MAX819LCPA is specifically designed to ignore fast transients on VCC and offers additional supervisory functions such as active-low reset, backup battery switchover, watchdog input, battery freshness seal, and chip-enable gating.

Specifications and features

- Precision Supply-Voltage Monitor: - 4.65V (MAX81_L) - 4.40V (MAX81_M) - 11µA Quiescent Supply Current - 200ms Reset Time Delay - Watchdog Timer with 1.6sec Timeout (MAX817/MAX818) - Battery-Backup Power Switching; Battery Voltage Can Exceed VCC - Battery Freshness Seal - On-Board, 3ns Gating of Chip-Enable Signals (MAX818) - Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819) - Manual Reset Input (MAX819)

Application Scenarios

- Battery-Powered Computers and Controllers - Embedded Controllers - Intelligent Instruments - Critical µP Monitoring - Portable Equipment

Comparison

- Simplifies power-supply monitoring and battery control - Reduces the number of components required - Ideal for portable applications - None mentioned in the provided information