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參數資料
| 型號： | ASM1832S |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 3.3V UP Power Supply Monitor and Reset Circuit |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數： | 1/9頁 |
| 文件大?。?/td> | 259K |
| 代理商： | ASM1832S |
Alliance Semiconductor
ASM1832
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
rev 1.5
3.3V μP Power Supply Monitor and Reset Circuit
February 2005
General Description
The ASM1832 is a fully integrated microprocessor supervisor. It
can halt and restart a “hung-up” microprocessor, restart a
microprocessor after a power failure. It has a watchdog timer
and external reset override. RESET and RESET outputs are
push-pull.
A
comparator circuits monitor the 3.3V, V
CC
input voltage status.
During power-up or when the V
CC
power supply falls outside
selectable tolerance limits, both RESET and RESET become
active. When V
CC
rises above the threshold voltage, the reset
signals remain active for an additional 250ms minimum,
allowing the power supply and system microprocessor to
stabilize. The trip point tolerance signal, TOL, selects the trip
level tolerance to be either 10% or 20%.
precision
temperature-compensated
reference
and
A debounced manual reset input, PBRST, activates the reset
outputs for a minimum period of 250ms. There is a watchdog
timer to stop and restart a microprocessor that is “hung-up”.
The watchdog timeouts periods are selectable: 150ms, 610ms,
and 1200ms. If the ST input is not strobed LOW before the
time-out period expires, a reset is generated.
Devices are available in 8-pin PDIP, 8-pin SO and compact 8-
pin MicroSO packages.
Key Features
3.3V supply monitor
Push-pull output
Selectable watchdog period
Debounce manual push-button reset input
Precision temperature-compensated voltage reference
and comparator.
Power-up, power-down and brown out detection
250ms minimum reset time
Active LOW and HIGH reset signal
Selectable trip point tolerance: 10% or 20%
Low-cost 8-pin DIP/SO and 8-pin Micro SO packages
Wide operating temperature -40°C to +85°C
Applications
Microprocessor systems
Computers
Controllers
Portable instruments
Automotive systems
Typical Operating Circuit
Block Diagram
Tolerance Selection
Reference
Push Button
Debounce
Voltage Sense
Comparator
Reset &
Watchdog Timer
Watchdog
Transition Detector
+
-
V
CC
TOL
PBRST
TD
ST
RESET
RESET
40K
V
CC
V
CC
V
CC
GND
ASM1832
ST
RESET
RESET
I/O
μP
ASM1832
GND
TOL
TD
3.3V
相關PDF資料 |
PDF描述 |
|---|---|
| ASM1832SEMA | 3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1832SF | 3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1832U | 3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1832UF | 3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1834A-T | Dual 5V and 3.3V uP Power Supply Supervisor with Manual Reset |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ASM1832SEMA | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1832SF | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:3.3V μP Power Supply Monitor and Reset Circuit |
| ASM1832U | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1832UF | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:3.3V UP Power Supply Monitor and Reset Circuit |
| ASM1834 | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Dual 5V and 3.3V uP Power Supply Supervisor with Manual Reset |
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