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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TC1232CPA 데이터시트(PDF) 1 Page - Microchip Technology |
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TC1232CPA 데이터시트(HTML) 1 Page - Microchip Technology |
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1 / 24 page  2002-2014 Microchip Technology Inc. DS20001370E-page 1 TC1232 Features: • Precision Voltage Monitor: - Adjustable +4.5V or +4.75V • Reset Pulse Width – 250 ms minimum • No External Components • Adjustable Watchdog Timer: - 150 ms, 600 ms or 1.2s • Operating Voltage 4.0V to 5.5V • Debounced Manual Reset Input for External Override Block Diagram General Description: The TC1232 is a fully-integrated processor supervisor that provides three important functions to safeguard processor sanity: precision power on/off Reset control, Watchdog Timer and external Reset override. On power-up, the TC1232 holds the processor in the Reset state for a minimum of 250 ms after VCC 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 periodic low-going signal on the ST input. Should the processor fail to supply this signal within the selected time-out period (150 ms, 600 ms or 1200 ms), an out- of-control processor is indicated and the TC1232 issues a processor Reset as a result. The outputs of the TC1232 are immediately driven active when the PB input is brought low by an external push button switch or other electronic signal. When connected to a push button switch, the TC1232 provides contact debounce. The TC1232 is packaged in a space-saving 8-Pin PDIP or SOIC package, a 16-Pin SOIC (wide) package and requires no external components. Package Types Device Features + – VREF + + – RST RST Tolerance Select (5% or 10%) TOL VCC Debounce Watchdog Timebase Select PB RST TD Watchdog Timer ST Reset Generator Device RST pin RST pin Trip Points (Max) Minimum Reset Active Time (ms) WDI Input Typical Timeouts (ms) MR Input Type Pull-up Resistor Active Level Type Active Level TC1232 Open-drain External Low Push-pull High 4.75V or 4.5V 250 150, 600 or 1200 Yes 13 12 11 10 9 15 14 18 27 36 4 5 TC1232 RST RST GND TOL TD PB RST RST ST VCC RST ST 18 27 36 45 RST GND TOL TD PB RST RST ST VCC PB RST VCC 1 2 3 4 5 6 7 8 16 NC TD NC NC TOL GND NC NC NC TC1232 NC NC 16-Pin SOIC (Wide) 8-Pin PDIP 8-Pin SOIC TC1232 18 36 45 TC1232 Microprocessor Monitor |
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