DS1819A数据手册集成电路（IC）的监控器规格书PDF

描述 Description

The DS1814 5-Volt MicroMonitor and the DS1819 3.3V MicroMonitor monitor three vital conditions for a microprocessor: power supply, software execution, and external override. First, a precision temperature-compensated reference and comparator circuit monitor the status of VCC. When an out-of-tolerance condition occurs, an internal power-fail signal is generated which forces the reset(s) to an active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for a minimum of 140ms to allow the power supply and processor to stabilize.The DS1814/DS1819 ‘A' and ‘C' perform pushbutton reset control. They debounce the pushbutton input and generate an active reset pulse width of 140ms minimum. The DS1814/9 'A' and 'B' versions perform a watchdog function. The watchdog is an internal timer that forces the reset signals to the active state if the strobe input does not change state every 1.12 seconds. The watchdog timer function can be disabled by leaving the watchdog strobe input disconnected.

特性 Features

·Halts and restarts an out-of-control microprocessor
·Holds microprocessor in check during power transients
·Automatically restarts microprocessor after power failure
·Monitors pushbutton for external override
·Accurate 5%, 10%, or 20% (3V only) microprocessor power monitoring
·Eliminates the need for discrete components
·20% tolerance for use with 3.0V systems
·Pin- and function-compatible with the MAX823/24/25 products
·Low cost SOT-23-5 package
·Industrial temperature range: -40°C to +85°C

简介

DS1819A属于集成电路（IC）的监控器。由制造生产的DS1819A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。