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參數(shù)資料
| 型號(hào)： | ASM161 |
| 廠商： | Alliance Semiconductor Corporation |
| 英文描述： | uP Supervisory Circuit |
| 中文描述： | 的監(jiān)控電路 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大小： | 245K |
| 代理商： | ASM161 |
3.08
2.93
2.63
Alliance Semiconductor
ASM161 / ASM162
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 1.0
μP Supervisory Circuit
October 2003
General Description
The ASM161 and ASM162 are cost effective, low power
supervisory
circuits
that
monitor
microprocessor, microcontroller and digital systems. If the
power supply drops below the reset threshold level, a reset is
asserted and remains asserted for atleast 800ms after V
CC
has
risen above the reset threshold. An improved manual reset
architecture gives the system designer additional flexibility.
power
supplies
in
The debounced manual reset input is negative edge triggered.
The reset pulse period generated by a MR transition is a
minimum of 800 ms and a maximum of 2 sec duration. In
addition, The MR input signal is blocked for an additional 49μS
minimum after the reset pulse ends. During the MR disable
period, the microcontroller is guaranteed a time period free of
additional manual reset signals. During this period DRAM
contents can be refreshed or other critical system tasks
undertaken. Low power consumption makes the ASM161/162
ideal for use in portable and battery operated equipments. With
3V supplies power consumption is 8μW typically and 30μW
maximum. The ASM161 has an open-drain, active-LOW
RESET output and requires an external pull-up resistor. The
ASM162 has an active HIGH RESET output.
The ASM161/162 are offered in compact 4-pin SOT-143
packages. No external components are required to trim
threshold voltage for monitoring different supply voltages. With
six different factory set, reset, threshold ranges from 2.63V to
4.63V, the ASM161/162 are suitable for monitoring 5V, 3.6V
and 3.0V supplies. The ASM161/162 are available in
temperature ranges 0
0
to 70
0
c and -40
0
c to +85
0
c.
Key Features
Edge triggered manual reset input
single pulse output
49μS minimum MR disable period after reset
CMOS/TTL logic or switch interface
Debounced input
Low supply current extends battery life
6μA / 15μA typ/max at 5.5V
4.5μA / 10μA typ/max at 3.6V
Long reset period
0.8 sec minimum, 2 sec maximum
Two reset polarity options
ASM161: Active LOW, open-drain
ASM162: Active HIGH
Pinout matches the AS811/812
Small 4-Pin SOT-143 package
Two temperature ranges: 0
0
to 70
0
c and -40
0
c to +85
0
c
Applications
PDAs
Appliances
Computers and embedded controllers
Wireless communication systems
Battery operated and intelligent instruments
Automotive systems
Safety systems
Typical Operating Circuit
Reset Threshold
Part Suffix
L
M
J
T
S
R
Voltage (V)
4.63
4.38
4.00
V
CC
MR
(RESET)
GND
(RESET)
μP
ASM161
(ASM162)
RESET
RESET
V
CC
GND
V
CC
20k for
ASM161
only
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM161JCUS/T | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:uP Supervisory Circuit |
| ASM161JCUSF/T | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:μP Supervisory Circuit |
| ASM161JEUS/T | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:μP Supervisory Circuit |
| ASM161JEUSF/T | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:μP Supervisory Circuit |
| ASM161LCUS/T | 制造商:PULSECORE 制造商全稱:PulseCore Semiconductor 功能描述:μP Supervisory Circuit |
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