Maxim MAX791CPE

Цепь резервного питания4.65V1

Overview

The MAX791CPE microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. The 50µA supply current makes the MAX791CPE ideal for use in portable equipment, while the 6ns chip-enable propagation delay and 250mA output capability (25mA in battery-backup mode) make it suitable for larger, higher-performance equipment.

♦ Precision 4.65V Voltage Monitoring♦ 200ms Power-OK/Reset Time Delay♦ Independent Watchdog Timer—Preset or Adjustable♦ 1µA Standby Current♦ Power Switching 250mA Output in VCC Mode 25mA Output in Battery-Backup Mode♦ On-Board Gating of Chip-Enable Signals Memory Write-Cycle Completion 6ns CE Gate Propagation Delay♦ MaxCap or SuperCap Compatible♦ Voltage Monitor for Power-Fail or Low-Battery Warning♦ Backup-Battery Monitor♦ Guaranteed –R—E—S—E—T– Valid to VCC = 1V

Features

Applications

• Power distribution systems of operating room
• Power distribution systems of infant care room
• Power distribution systems of ICU
• Power distribution systems of CCU
• emergency room
• Medical-specific isolation transformer
• Medical-specific insulation monitor
• Transformer load monitoring equipment
• External alarm
• Display equipment