AS1925D07-T

AS1925D07-T Datasheet

AS1925, AS1926

Part	Datasheet
AS1925D07-T	AS1925D07-T (pdf)

Related Parts	Information
AS1926D07-T	AS1926D07-T

PDF Datasheet Preview
AS1925, AS1926 Ultra-Low Voltage Microprocessor Supervisory Circuit with Manual Reset Data Sheet 1 General Description 2 Key Features The AS1925/AS1926 microprocessor supervisory circuits were designed to assert a single reset if the monitored supply voltage drops below its reset threshold or if the manual reset is activated. The reset remains asserted for a fixed timeout delay after VCC has risen above the reset threshold and the manual reset is deasserted. Their small size, excellent circuit reliability, and low supply current 3.5µA make the AS1925/AS1926 a very low cost solution by eliminating external components and adjustments when used with low-voltage to +1.5V systems. The devices are available as the standard products listed in Table Table Standard Products Model Output Type AS1925 Active-Low Push/Pull, Active-High Push/Pull AS1926 Active-High Push/Pull, Active-Low Open-Drain The active-low open-drain reset output requires a pullup resistor that can be connected to a voltage from 0 to VCC. The reset comparator was specifically designed to ignore fast VCC transients. The devices are available in a 5-pin SOT23 package. ! Factory-Trimmed Reset Thresholds for Monitoring Supplies from to 1.5V ! Low Power Consumption 3.5µA ! Reset Threshold Accuracy Over Temperature: ! Four Timeout Periods 1.5ms, 30ms, 210ms, and 1.68s ! Three Reset Output Types - Active-Low Push/Pull - Active-High Push/Pull - Active Low Open-Drain ! Guaranteed Reset Valid to VCC = 0.55V ActiveLow ! Manual Reset Input ! Immune to Fast VCC Transients ! 5-pin SOT23 Package 3 Applications Figure Block Diagram and Pinout The device is ideal for portable and battery-powered systems, embedded controllers, intelligent instruments, automotive systems, telecommunications equipment, networking equipment, computer workstations and servers, critical CPU monitoring applications, and any lowvoltage application. 4 MRN 5 VCC Pullup VREF AS1925/ AS1926 Manual Reset Detect Reset Timeout Period Reset Output 3 RESET 1 RESETN RESETN 1 5 VCC AS1925/ GND 2 AS1926 RESET 3 Data Sheet - Ordering Information 11 Ordering Information The AS1925/AS1926 are available as the standard products shown in Table Table Ordering Information Model AS1925-BSTT-xyy1 Ultra-Low Reset Threshold with Manual Reset AS1925-BSTT-D07 Ultra-Low Reset Threshold 0.81V with Manual Reset AS1926-BSTT-D07 Ultra-Low Reset Threshold 0.81V with Manual Reset, Open-Drain Timeout Period 140ms Reset 140ms Reset Delivery Form Package Tape and Reel 5-pin SOT23 Tape and Reel 5-pin SOT23 Tape and Reel 5-pin SOT23 xx and y is a placeholder for variants, e.g., AS1926-BSTT-D07 offers 0.81V max reset threshold and a 140ms minimum timeout periode see Table Available upon request. Contact austriamicrosystems, AG for more information. Table Model Variants Suffix x Reset timout ms min typ max 20 30 40 140 210 280 1120 1680 2240 Suffix yy Reset Threshold V min typ max 11 - 12 AS1925/AS1926 Data Sheet 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 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 to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. 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 lifesustaining 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. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to 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 technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 12 - 12

PDF Datasheet Preview

AS1925, AS1926

Ultra-Low Voltage Microprocessor Supervisory Circuit with Manual Reset

Data Sheet
1 General Description
2 Key Features

The AS1925/AS1926 microprocessor supervisory circuits were designed to assert a single reset if the monitored supply voltage drops below its reset threshold or if the manual reset is activated. The reset remains asserted for a fixed timeout delay after VCC has risen above the reset threshold and the manual reset is deasserted.

Their small size, excellent circuit reliability, and low supply current 3.5µA make the AS1925/AS1926 a very low cost solution by eliminating external components and adjustments when used with low-voltage to +1.5V systems.

The devices are available as the standard products listed in Table

Table Standard Products

Model

Output Type

AS1925

Active-Low Push/Pull, Active-High Push/Pull

AS1926

Active-High Push/Pull, Active-Low Open-Drain

The active-low open-drain reset output requires a pullup resistor that can be connected to a voltage from 0 to VCC. The reset comparator was specifically designed to ignore fast VCC transients.

The devices are available in a 5-pin SOT23 package.
! Factory-Trimmed Reset Thresholds for Monitoring Supplies from to 1.5V
! Low Power Consumption 3.5µA
! Reset Threshold Accuracy Over Temperature:
! Four Timeout Periods 1.5ms, 30ms, 210ms, and 1.68s
! Three Reset Output Types - Active-Low Push/Pull - Active-High Push/Pull - Active Low Open-Drain
! Guaranteed Reset Valid to VCC = 0.55V ActiveLow
! Manual Reset Input
! Immune to Fast VCC Transients
! 5-pin SOT23 Package
3 Applications

Figure Block Diagram and Pinout

The device is ideal for portable and battery-powered systems, embedded controllers, intelligent instruments, automotive systems, telecommunications equipment, networking equipment, computer workstations and servers, critical CPU monitoring applications, and any lowvoltage application.
4 MRN
5 VCC

Pullup VREF

AS1925/ AS1926

Manual Reset Detect

Reset Timeout Period

Reset Output
3 RESET 1 RESETN

RESETN 1
5 VCC

AS1925/ GND 2 AS1926

RESET 3
Data Sheet - Ordering Information
11 Ordering Information

The AS1925/AS1926 are available as the standard products shown in Table
Table Ordering Information

Model

AS1925-BSTT-xyy1

Ultra-Low Reset Threshold with Manual Reset

AS1925-BSTT-D07

Ultra-Low Reset Threshold 0.81V with Manual Reset

AS1926-BSTT-D07

Ultra-Low Reset Threshold 0.81V with Manual Reset, Open-Drain

Timeout Period
140ms Reset 140ms Reset

Delivery Form Package Tape and Reel 5-pin SOT23 Tape and Reel 5-pin SOT23 Tape and Reel 5-pin SOT23
xx and y is a placeholder for variants, e.g., AS1926-BSTT-D07 offers 0.81V max reset threshold and a 140ms minimum timeout periode see Table Available upon request. Contact austriamicrosystems, AG for more information.

Table Model Variants

Suffix x Reset timout ms
min typ max
20 30 40
140 210 280
1120 1680 2240

Suffix yy Reset Threshold V
min typ max
11 - 12

AS1925/AS1926

Data Sheet

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

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 to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. 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 lifesustaining 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. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to 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 technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
12 - 12

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 AS1925D07-T Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1925D07-T 519670