MAX807M数据手册集成电路（IC）的监控器规格书PDF

描述 Description

The MAX807 microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. A 70µA supply current makes the MAX807 ideal for use in portable equipment, while a 2ns chip-enable propagation delay and 250mA output current capability (20mA in battery-backup mode) make it suitable for larger, higher-performance equipment.
The MAX807 comes in 16-pin DIP, SO, and TSSOP packages, and provides the following functions: µP reset. The active-low RESET output is asserted during power-up, power-down, and brownout conditions, and is guaranteed to be in the correct state for VCC down to 1V. Active-high RESET output. Manual-reset input. Two-stage power-fail warning. A separate low-line comparator compares VCC to a threshold 52mV above the reset threshold. This low-line comparator is more accurate than those in previous µP supervisors. Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic. Write protection of CMOS RAM or EEPROM. 2.275V threshold detector provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V. BATT OK status flag indicates that the backup-battery voltage is above +2.275V. Watchdog-fault output—asserted if the watchdog input has not been toggled within a preset timeout period.

特性 Features

• Precision 4.675V (MAX807L), 4.425V (MAX807M), or 4.575V (MAX807N) Voltage Monitoring
• 200ms Power-OK/Reset Time Delay
• RESET-bar and RESET Outputs
• Independent Watchdog Timer
• 1µA Standby Current
• Power Switching
• 250mA in VCC Mode
• 20mA in Battery-Backup Mode
• On-Board Gating of Chip-Enable Signals;
• 2ns CE Gate Propagation Delay
• MaxCap® and SuperCap Compatible
• Voltage Monitor for Power Fail
• Backup-Battery Monitor
• Guaranteed active-low RESET Valid to VCC = 1V
• ±1.5% Low-Line Threshold Accuracy 52mV above Reset Threshold

应用 Application

• 计算机：台式机、工作站和服务器
• 控制器
• 精确的µP监控
• 智能仪表
• 便携式电池供电设备

简介

MAX807M属于集成电路（IC）的监控器。由制造生产的MAX807M监控器PMIC 监控器用于监视和/或控制电路中的电压轨，能够连接微控制器以维持一定的功率限值。监控器类型包括电池备用电路、监控器、多电压监控器、电源监控器、稳压器/监控器、复位计时器、定序器、简单复位/上电复位、智能开/关控制器、系统管理器、电压检测器和看门狗电路。