ASM161MCUS/T

更新时间： 2024-11-23 22:17:07

品牌	Logo	应用领域
ALSC		电源电路电源管理电路光电二极管监控
页数	文件大小	规格书
9页	246K
描述
uP Supervisory Circuit

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中文翻译

获取价格

数据手册

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ASM161MCUS/T 数据手册

October 2003

ASM161 / ASM162

rev 1.0

µP Supervisory Circuit

Key Features

General Description

The ASM161 and ASM162 are cost effective, low power

supervisory circuits that monitor power supplies in

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_CChas

•

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

risen above the reset threshold. An improved manual reset

architecture gives the system designer additional flexibility.

•

Long reset period

• 0.8 sec minimum, 2 sec maximum

Two reset polarity options

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.

• ASM161: Active LOW, open-drain

• ASM162: Active HIGH

Pinout matches the AS811/812

Small 4-Pin SOT-143 package

•

Two temperature ranges: 0⁰to 70⁰c and -40⁰c to +85⁰c

Applications

•

PDAs

Appliances

Computers and embedded controllers

Wireless communication systems

Battery operated and intelligent instruments

Automotive systems

Safety systems

Typical Operating Circuit

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

V_CC

temperature ranges 0⁰to 70⁰c and -40⁰c to +85⁰c.

20k for

ASM161

only

ASM161

(ASM162)

RESET

(RESET)

RESET

(RESET)

Reset Threshold

Part Suffix

Voltage (V)

4.63

µP

GND

4.38

4.00

3.08

2.93

2.63

Alliance Semiconductor

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

12 3 4 5 6 7...9

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与ASM161MCUS/T相关器件

型号	品牌	获取价格	描述	数据表
ASM161MCUSF	ONSEMI	获取价格	Supervisory Circuit
ASM161MCUSF/T	PULSECORE	获取价格	μP Supervisory Circuit
ASM161MEUS	ONSEMI	获取价格	Supervisory Circuit
ASM161MEUS/T	ONSEMI	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4, PLASTIC, SOT-143, 4 PIN
ASM161MEUS/T	PULSECORE	获取价格	μP Supervisory Circuit
ASM161MEUS/T	ALSC	获取价格	uP Supervisory Circuit
ASM161MEUSF	ONSEMI	获取价格	IC,VOLT DETECTOR,FIXED,+4.38V,TO-253,4PIN,PLASTIC
ASM161MEUSF/T	PULSECORE	获取价格	μP Supervisory Circuit
ASM161RCUS	ONSEMI	获取价格	Supervisory Circuit
ASM161RCUS/T	PULSECORE	获取价格	μP Supervisory Circuit

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