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TC1232EPA データシート(PDF) 1 Page - Microchip Technology

部品番号 TC1232EPA
部品情報  Microprocessor Monitor
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1232EPA データシート(HTML) 1 Page - Microchip Technology

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 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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