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參數資料
| 型號： | TC1232EPA |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 262K |
| 代理商： | TC1232EPA |
2005 Microchip Technology Inc.
Preliminary
DS21370C-page 1
TC1232
Features
Precision Voltage Monitor
- Adjustable +4.5V or +4.75V
Reset Pulse Width – 250 msec minimum
No External Components
Adjustable Watchdog Timer
- 150 msec, 600 msec or 1.2 sec
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 msec after VCC is
within tolerance to ensure a stable system start-up.
Microprocessor sanity is monitored by the onboard
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 msec, 600 msec or 1200 msec),
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
Tolerance
Select
(5% or 10%)
TOL
VCC
Debounce
Watchdog
Timebase
Select
PB RST
TD
Watchdog
Timer
ST
Reset
Generator
Device
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
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
TOL
GND
NC
TC1232
NC
16-Pin SOIC (Wide)
8-Pin PDIP
8-Pin SOIC
TC1232
18
36
45
TC1232
Microprocessor Monitor
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC1232EPA | 制造商:Microchip Technology Inc 功能描述:Microprocessor Support IC Voltage Rating |
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