TC32MEZB Microchip

TC32M ECONOMONITOR 3-Pin System Supervisor with Power Supply Monitor and Watchdog Features: General Description: Incorporates the Functionality of the Industry The TC32M is a fully-integrated processor supervisor Standard TC1232 (Processor Monitor, Watchdog in a 3-pin package. It provides three important func- and Manual Override Reset Controller) into a tions to safeguard processor sanity: precision power Small, Lower Cost Package on/off Reset control, Watchdog Timer and external Reset override. Guards Against Unstable Processor Operation Resulting from Power Brown-Out On power-up, the TC32M holds the processor in the Automatically Halts and Restarts an Out-of- Reset state for a minimum of 500 msec after V is DD Control Microprocessor within tolerance to ensure a stable system start-up. Microprocessor sanity is monitored by the on-board Output can be Wire-ORed, or Hooked to Manual Watchdog circuit. The microprocessor must provide a Reset Push-button Switch high-to-low level shift (through an external resistor Space-Saving 3-Pin TO-92 or SOT-223 Package divider) on the RS pin of the TC32M. Should the processor fail to supply this signal within the specified Applications: time-out period (typically 700 msec), an out-of-control processor is indicated and the TC32M issues a All Microprocessor-Based Systems processor Reset as a result. Battery Powered Computers and Controllers The output of the TC32M can be wire-ORed with a Automotive Systems push-button switch (or electronic signal) to override the Intelligent Instruments TC32M and unconditionally reset the processor. When Critical Processor Monitoring connected to a push-button switch, the TC32M Embedded Controllers provides contact debounce. The TC32M is packaged in a space-saving TO-92 or Device Selection Table SOT-223 package. It provides all of the functionality of Part Number Package Temp. Range the industry standard TC1232 in a smaller, lower cost configuration. TC32MCDB SOT-223 0C to +70C TC32MCZB TO-92 0C to +70C TC32MEDB SOT-223 -40C to +85C TC32MEZB TO-92 -40C to +85C Package Type 1 23 V DD 4 TC32MCDB TC32MEDB TC32MCZB TC32MEZB 12 3 GND V DD RS 2001-2012 Microchip Technology Inc. DS21402D-page 1 GND V DD RSTC32M Functional Block Diagram Typical Operating Circuit V DD 5V TC32M V REF1 R1, 10 k Microcontroller DV Watchdog R2, 10 k Timer Detector PO.1 RS RS Reset V REF2 TC32M Reset Delay Timer GND DS21402D-page 2 2001-2012 Microchip Technology Inc.