器件名称:
TC32MCZB
功能描述:
ECONOMONITOR - 3-PIN SYSTEM SUPERVISOR WITH POWER SUPPLY MONITOR AND WATCHDOG
文件大小:
57.58KB 共4页
简 介:
1 TC32M ECONOMONITOR – 3-PIN SYSTEM SUPERVISOR WITH POWER SUPPLY MONITOR AND WATCHDOG FEATURES s Incorporates the Functionality of the Industry Standard TC1232 (Processor Monitor, Watchdog and Manual Override RESET Controller) into a Small, Lower Cost Package Guards Against Unstable Processor Operation Resulting from Power "Brown-Out" Automatically Halts and Restarts an Out-ofControl Microprocessor Output can be Wire-ORed, or Hooked to Manual RESET Push-button Switch Space-Saving 3-Pin TO-92 or SOT-223 Package 2 GENERAL DESCRIPTION The TC32M is a fully-integrated processor supervisor in a 3-pin package. It provides three important functions to safeguard processor sanity: precision power on/off RESET control, watchdog timer and external RESET override. On power-up, the TC32M holds the processor in the reset state for a minimum of 500msec after VDD is within tolerance to ensure a stable system start-up. Microprocessor sanity is monitored by the on-board watchdog circuit. The microprocessor must provide a high-to-low level shift (through an external resistor divider) on the RS pin of the TC32M. Should the processor fail to supply this signal within the specified timeout period (typically 700msec), an out-ofcontrol processor is indicated and the TC32M issues a processor reset as a result. The output of the TC32M can be wire-ORed with a pushbutton switch (or electronic signal) to override the TC32M and unconditionally reset the processor. When connected to a push-button switch, ……
