CDB75N03L

General Description:

The TC32M is a fully-integrated processor supervisor in a 3-pin package. It provides three important func tions 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 500 msec 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 time-out period (typically 700 msec), an out-of-control processor is indicated and the TC32M issues a processor Reset as a result.
The output of the TC32M can be wire-ORed with a push-button switch (or electronic signal) to override the TC32M and unconditionally reset the processor. When connected to a push-button switch, the TC32M provides contact debounce.
The TC32M is packaged in a space-saving TO-92 or SOT-223 package. It provides all of the functionality of the industry standard TC1232 in a smaller, lower cost configuration.

Features:

• 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-of
Control Microprocessor
• Output can be Wire-ORed, or Hooked to Manual
Reset Push-button Switch
• Space-Saving 3-Pin TO-92 or SOT-223 Package

Applications:

• All Microprocessor-Based Systems
• Battery Powered Computers and Controllers
• Automotive Systems
• Intelligent Instruments
• Critical Processor Monitoring
• Embedded Controllers