AS1922-18-T

AS1922-18-T Datasheet

AS1920, AS1922

Part	Datasheet
AS1922-18-T	AS1922-18-T (pdf)

Related Parts	Information
AS1920-18-T	AS1920-18-T

PDF Datasheet Preview
austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 e-Mail: Please visit our website at AS1920, AS1922 Triple-Voltage, Micro-Power Microprocessor Supervisory Circuits Data Sheet 1 General Description 2 Key Features 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 lid its respective trip threshold. These very-low-current 6.2uA, typ devices maintain reset for a minimum timeout period after all supplies have stabilized. Guaranteed to be in the correct state for a VCC > +1.0V, these devices are perfect for multiple-volt- age systems with low current requirements and strict v monitoring requirements. ill The devices are available as the standard products listed in Table Table Standard Products t Model Output Type Supervisory Voltages G s AS1920-18 Push/Pull 3V, 1.8V, Adjustable AS1922-18 Open-Drain 3V, 1.8V, Adjustable A t All devices monitor primary and secondary factorys n trimmed voltages. Additionally, a third monitoring voltage can be selected via an external resistor divider. e The AS1920 has an active-low push/pull reset output, m t whereas the AS1922 has an active-low open-drain reset output. a 3nApplications The AS1920 and AS1922 are available in a 5-pin SOT23 package. l co Figure Typical Application Diagram Triple-Voltage Monitoring Supply Current 6.2uA Accuracy Over Temperature Time Delay 200ms Supply Transient Immunity Reset for VCC3 t 1V or VCC18 Push/Pull Reset Output AS1920 Open-Drain Reset Output AS1922 SOT23 Package The devices are ideal for personal computers, notebooks, battery-powered systems, embedded controllers, intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply monitoring application. a 3V ic 1.8V 2.5V Techn0.1uF System Logic R1 130k: 1% 0.1uF R2 100k: Datasheet - Ordering Information 11 Ordering Information The devices are available as the standard products shown in Table Table Ordering Information Model Marking Reset Type Delivery Form Package AS1920-18-T Technicaaml scoAnGtent still valid AS1922-18-T ASI1 ASI2 Triple-Voltage Supervisory Circuit 3V, 1.8V, and Adjustable. Triple-Voltage Supervisory Circuit 3V, 1.8V, and Adjustable. Push/Pull Open-Drain Tape and Reel Tape and Reel 5-pin SOT23 5-pin SOT23 13 - 14 AS1920/AS1922 Datasheet Copyrights Copyright 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, 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. Disclaimer lid Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior a to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. v This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life- ill sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. t The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, G austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to s personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech- A t nical data herein. No obligation or liability to recipient or any third party shall arise or flow out of s n austriamicrosystems AG rendering of technical or other services. icaaml conte Contact Information n Headquarters h austriamicrosystems AG A-8141 Schloss Premstaetten, Austria c Tel +43 0 3136 500 0 Te Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 14 - 14

PDF Datasheet Preview

austriamicrosystems AG is now
ams AG

The technical content of this austriamicrosystems datasheet is still valid.

Contact information Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 e-Mail:

Please visit our website at

AS1920, AS1922

Triple-Voltage, Micro-Power Microprocessor Supervisory Circuits

Data Sheet
1 General Description
2 Key Features

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
lid its respective trip threshold.

These very-low-current 6.2uA, typ devices maintain
reset for a minimum timeout period after all supplies
have stabilized. Guaranteed to be in the correct state for
a VCC > +1.0V, these devices are perfect for multiple-volt-
age systems with low current requirements and strict
v monitoring requirements.
ill The devices are available as the standard products
listed in Table

Table Standard Products
t Model Output Type Supervisory Voltages

G s AS1920-18 Push/Pull
3V, 1.8V, Adjustable

AS1922-18 Open-Drain 3V, 1.8V, Adjustable

A t All devices monitor primary and secondary factorys n trimmed voltages. Additionally, a third monitoring voltage
can be selected via an external resistor divider.
e The AS1920 has an active-low push/pull reset output, m t whereas the AS1922 has an active-low open-drain reset
output.
a 3nApplications The AS1920 and AS1922 are available in a 5-pin

SOT23 package.
l co Figure Typical Application Diagram

Triple-Voltage Monitoring Supply Current 6.2uA Accuracy Over Temperature Time Delay 200ms Supply Transient Immunity Reset for VCC3 t 1V or VCC18 Push/Pull Reset Output AS1920 Open-Drain Reset Output AS1922 SOT23 Package

The devices are ideal for personal computers, notebooks, battery-powered systems, embedded controllers, intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply monitoring application.
a 3V ic 1.8V
2.5V

Techn0.1uF

System Logic

R1 130k:
1% 0.1uF

R2 100k:
Datasheet - Ordering Information
11 Ordering Information

The devices are available as the standard products shown in Table
Table Ordering Information

Model

Marking

Reset Type Delivery Form Package

AS1920-18-T

Technicaaml scoAnGtent still valid AS1922-18-T

ASI1 ASI2

Triple-Voltage Supervisory Circuit 3V, 1.8V, and Adjustable.

Triple-Voltage Supervisory Circuit 3V, 1.8V, and Adjustable.

Push/Pull Open-Drain

Tape and Reel Tape and Reel
5-pin SOT23 5-pin SOT23
13 - 14

AS1920/AS1922

Datasheet

Copyrights

Copyright 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, 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.

Disclaimer
lid Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing
in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
a to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. v This product is intended for use in normal commercial applications. Applications requiring extended temperature
range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-
ill sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for
each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
t The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, G austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to s personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the tech-

A t nical data herein. No obligation or liability to recipient or any third party shall arise or flow out of s n austriamicrosystems AG rendering of technical or other services. icaaml conte Contact Information n Headquarters h austriamicrosystems AG

A-8141 Schloss Premstaetten, Austria
c Tel +43 0 3136 500 0 Te Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
14 - 14

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS1922-18-T Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1922-18-T 519668