Datasheet > AS1923

AS1923

更新时间： 2024-10-01 04:06:43

品牌	Logo	应用领域
艾迈斯 - AMSCO		微处理器监控
页数	文件大小	规格书
2页	77K
描述
Quad-Voltage Microprocessor Supervisory Circuit

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AS1923 数据手册

Product Brief

AS1923

Quad-Voltage Microprocessor Supervisory Circuit

1 General Description

2 Key Features

ꢀ

Simultaneous Quad-Voltage Monitoring

The AS1923 microprocessor supervisory circuit was

designed to monitor up to four system supply voltages

without the need for external components, and asserts a

single reset if any of the monitored supply voltages

drops below its reset threshold.

ꢀ

Precision Factory-Trimmed Reset Threshold

Options: +5.0, +3.3, +3.0, +2.5, +1.8, and -5.0V

ꢀ

User-Adjustable Voltage Monitoring Threshold

Options

The AS1923 features an active-low reset output that is

asserted when any of the 4 monitored voltages are

below their respective reset threshold. The reset output

is open-drain with a weak internal pullup (10µA) to IN2.

Reset remains low for a specified reset timeout period

(120ms min) after all voltages have stabilized. The out-

put is valid as long as the IN1 or IN2 input voltage

remains >1V.

ꢀ

Low Supply Current: 55µA

Open-Drain – AS1923A

10µA Current Source Pullup – AS1923B

Reset Timeout Period: 120ms

RESET Valid to IN1 = 1V or IN2 = 1V

Immune to Fast INx Transients

External Components not Required

Minimal external component requirements, small size,

and wide temperature range (-40 to +85°C) greatly

improves reliability compared to individual supervisory

circuits or discrete components.

A wide range of factory-trimmed threshold voltages are

available to accommodate many different supply volt-

ages/tolerances with minimal external component

requirements.

Guaranteed Performance: Operating Temperature

Range = -40 to +85ºC

Factory-trimmed options are available for monitoring

+5.0, +3.3, +3.0, +2.5, +1.8, and -5.0V supplies with -5%

and/or -10% tolerances. The device is also available

with one or two user-adjustable threshold options (via

external resistor-divider network) if non-standard voltage

thresholds are required.

ꢀ

6-pin SOT23 package

3 Applications

The AS1923 is available in an 6-pin SOT23 package.

The device is ideal for portable and battery-powered

systems, embedded controllers, intelligent instruments,

automotive systems, critical CPU monitoring, and any

multi-supply application.

Figure 1. Application Diagram and Pinout

IN4

GND

IN3

IN2

IN1

Monitoring

Voltage 1

IN1

Monitoring

Voltage 2

IN2

CPU

AS1923

RESETN RESETN

Monitoring

Voltage 3

IN3

Monitoring

Voltage 4

RESETN

IN4

GND

www.austriamicrosystems.com

Revision 1.00

1 - 2

中文翻译

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与AS1923相关器件

型号	品牌	获取价格	描述	数据表
AS1923_04	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS192-300	ALPHA	获取价格	PHEMT GaAs IC High Power SP4T Switch 0.1-2.5 GHz
AS192-306	SKYWORKS	获取价格	PHEMT GaAs IC High Power SP4T Switch 0.1-2.5 GHz
AS1923A-BSTT-A	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS1923A-BSTT-C	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS1923A-BSTT-I	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS1923A-BSTT-K	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS1923A-BSTT-O	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS1923A-BSTT-x	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit
AS1923B-BSTT-x	AMSCO	获取价格	Quad-Voltage Microprocessor Supervisory Circuit

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