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TC32MEZB Datasheet(PDF) 1 Page - Microchip Technology |
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TC32MEZB Datasheet(HTML) 1 Page - Microchip Technology |
1 / 12 page © 2006 Microchip Technology Inc. DS21402C-page 1 TC32M 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 Device Selection Table Package Type 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. Part Number Package Temp. Range TC32MCDB SOT-223 0°C to +70°C TC32MCZB TO-92 0°C to +70°C TC32MEDB SOT-223 -40°C to +85°C TC32MEZB TO-92 -40°C to +85°C 1 12 4 3 23 GND TC32MCDB TC32MEDB TC32MCZB TC32MEZB VDD VDD RS ECONOMONITOR™ – 3-Pin System Supervisor with Power Supply Monitor and Watchdog |
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