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TC32MCZB Folha de dados(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC32MCZB Folha de dados(HTML) 1 Page - TelCom Semiconductor, Inc |
1 / 4 page 5-3 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 ECONOMONITOR™ – 3-PIN SYSTEM SUPERVISOR WITH POWER SUPPLY MONITOR AND WATCHDOG VDD VREF2 VREF1 TC32M WATCHDOG TIMER RS GND ∆V DETECTOR DELAY TIMER TC32M FEATURES s Incorporates the Functionality of the Industry Standard TC1232 (Processor Monitor, Watchdog and Manual Override RESET Controller) into a Small, Lower Cost Package s Guards Against Unstable Processor Operation Resulting from Power "Brown-Out" s Automatically Halts and Restarts an Out-of- Control Microprocessor s Output can be Wire-ORed, or Hooked to Manual RESET Push-button Switch s Space-Saving 3-Pin TO-92 or SOT-223 Package APPLICATIONS s All Microprocessor-Based Systems s Battery Powered Computers and Controllers s Automotive Systems s Intelligent Instruments s Critical Processor Monitoring s Embedded Controllers ORDERING INFORMATION Temperature Part No. Package 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 PIN CONFIGURATIONS 1 1 2 4 3 23 GND TC32MCDB TC32MEDB TC32MCZB TC32MEZB VDD VDD RS FUNCTIONAL BLOCK DIAGRAM TO-92 SOT-223 TYPICAL OPERATING CIRCUIT TC32M-2 9/26/96 5V RESET PO.1 RESET MICRO- CONTROLLER R2,10k MICROCONTROLLER EXAMPLE RS TC32M R1, 10k 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. Microproces- sor 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-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 configu- ration. |
Nº de peça semelhante - TC32MCZB |
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Descrição semelhante - TC32MCZB |
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