AS1920-18 AMSCO [austriamicrosystems AG], AS1920-18 Datasheet

AS1920-18

Manufacturer Part Number

AS1920-18

Description

Triple-Voltage, Micro-Power Microprocessor Supervisory Circuits

Manufacturer

AMSCO [austriamicrosystems AG]

Datasheet

1.AS1920-18.pdf (2 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

AS1920-18-T

Manufacturer:

Alliance

Quantity:

6 000

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A S 1 9 2 0 , A S 1 9 2 2

Tr i p l e - Vo l ta g e , M i c r o - P o w e r M i c r o p r o c e s s o r

Supervi s ory Ci rcuits

1 General Description

The AS1920 and AS1922 microprocessor supervisory

circuits were designed to generate a reset when at least

one of the three monitored supply voltages falls below

its respective trip threshold.

These very-low-current (6.5µA, typ) devices maintain

reset for a minimum timeout period after all supplies

have stabilized. Guaranteed to be in the correct state for

age systems with low current requirements and strict

monitoring requirements.

The devices are available as the standard products

listed in

Table 1. Standard Products

All devices monitor primary and secondary factory-

trimmed voltages. Additionally, a third monitoring voltage

can be selected via an external resistor divider.

The AS1920 has an active-low push/pull reset output,

whereas the AS1922 has an active-low open-drain reset

output.

The AS1920 and AS1922 are available in a 5-pin

SOT23 package.

Figure 1. Typical Application Diagram

www.austriamicrosystems.com

AS1920-18

AS1922-18

Model

> +1.0V, these devices are perfect for multiple-volt-

Table

Output Type

Open-Drain

Push/Pull

1.8V

2.5V

0.1µF

Supervisory Voltages

3V, 1.8V, Adjustable

0.1µF

130kΩ

100kΩ

Revision 0.65

CC18

CCA

CC3

2 Key Features

3 Applications

The devices are ideal for personal computers, note-

books, battery-powered systems, embedded controllers,

intelligent instruments, automotive systems, critical CPU

monitoring, and any multi-supply monitoring application.

AS1920/

AS1922

Simultaneous Triple-Voltage Monitoring

Very-Low Supply Current: 6.5µA

±1.5% Accuracy Over Temperature

Reset Time Delay: 200ms

Power Supply Transient Immunity

Guaranteed Reset for V

Active-Low Push/Pull Reset Output (AS1920)

Active-Low Open-Drain Reset Output (AS1922)

5-pin SOT23 Package

a us t ria

RESETN

GND

System

Logic

m i c r o

CC3

≥ 1V or V

CC18

s y s t e m s

P r o d u c t B r i e f

≥ 1V

1 - 2

Related parts for AS1920-18

AS1920-18 Summary of contents

Page 1

... The devices are available as the standard products listed in Table 1. Table 1. Standard Products Model Output Type Supervisory Voltages AS1920-18 Push/Pull 3V, 1.8V, Adjustable AS1922-18 Open-Drain 3V, 1.8V, Adjustable All devices monitor primary and secondary factory- trimmed voltages. Additionally, a third monitoring voltage can be selected via an external resistor divider. ...

Page 2

... AS1920, AS1922 Data Sheet Copyrights Copyright © 1997-2006, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, trans- lated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. ...

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