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TC1232 产品手册 - Microchip（微芯）
制造商:
Microchip（微芯）
封装:
SOIC-8
描述:
MCU监控芯片/TC1232
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TC1232数据手册
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若手册格式错乱，请下载阅览PDF原文件
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TELCOM SEMICONDUCTOR, INC.
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PRELIMINARY INFORMATION
TC1232
FEATURES
■ Precision Voltage
Monitor ....................... Adjustable +4.5V or +4.75V
■ Reset Pulse Width ............................. 250msec Min
■ No External Components
■ Adjustable Watchdog
Timer........................ 150msec, 600msec or 1.2sec
■ Debounced Manual Reset Input for External
Override
MICROPROCESSOR MONITOR
APPLICATIONS
■ Computers
■ Controllers
■ Intelligent Instruments
■ Automotive Systems
■ Critical µP Power Monitoring
FUNCTIONAL BLOCK DIAGRAM
V
CC
TC1232
+
–
5%/10%
TOLERANCE
SELECT
TOL
DEBOUNCE
WATCHDOG
TIMEBASE
SELECT
PB RST
TD
GND
REF
WATCHDOG
TIMER
RESET
GENERATOR
RST
RST
ST
+
ORDERING INFORMATION
Part No. Package Temp. Range
TC1232COA 8-Pin SOIC 0°C to +70°C
TC1232COE 16-Pin SOIC (Wide) 0°C to +70°C
TC1232CPA 8-Pin PDIP 0°C to +70°C
TC1232EOA 8-Pin SOIC – 40°C to +85°C
TC1232EOE 16-Pin SOIC (Wide) – 40°C to +85°C
TC1232EPA 8-Pin PDIP – 40°C to +85°C
TC1232-4 11/6/96
GENERAL DESCRIPTION
The TC1232 is a fully-integrated processor supervisor.
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 TC1232 holds the processor in the
reset state for a minimum of 250msec after V
CC
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 peri-
odic low-going signal on the ST input. Should the processor
fail to supply this signal within the selected time-out period
(150msec, 600msec or 1200msec), an out-of-control pro-
cessor 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 plastic
DIP or SOIC package and requires no external components.
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