AS1920-18-T austriamicrosystems, AS1920-18-T Datasheet
AS1920-18-T
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AS1920-18-T Summary of contents
Page 1
... 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 3V 1.8V 2.5V 0.1µ ...
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... Note: Bypass this pin to GND with a ≥0.1µF ceramic capacitor sense input and power supply pin (AS1920-18, AS1922-18). This pin CC3 provides power to the device. Note: Bypass this pin to GND with a ≥0.1µF ceramic capacitor. ...
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... AS1920/AS1922 Datasheet - Absolute Maximum Ratings Stresses beyond those listed in Table 3 and functional operation of the device at these or any other conditions beyond those indicated in istics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3. Absolute Maximum Ratings ...
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... AS1920/AS1922 Datasheet - Electrical Characteristics V = 1.8V 3V CC18 CC3 CCA CC3 Table 4. Electrical Characteristics Symbol Parameter V Reset Threshold V RT18 V Reset Threshold V RT3 V Reset Threshold V RTA Operating Voltage CC3 CC18 I V Supply Current VCC18 CC18 I V Supply Current VCC3 CC3 1 V Input Current CCA ...
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... AS1920/AS1922 Datasheet - Typical Operating Characteristics T = +25ºC (unless otherwise specified). AMB Figure 3. I vs. Temperature VCC18 1 0.9 0.8 0.7 0.6 0.5 -100 - Temperature (°C) Figure 5. Supply Current V vs. Temperature CCA -100 - Temperature (°C) Figure 7. t vs. Temperature; V RST CC3 280 260 240 220 ...
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... Datasheet - Detailed Description The AS1920/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 stabi- lized ...
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... AS1920/AS1922 Datasheet - Figure 11. AS1922 Block Diagram 5 V CC3 Power V CC Detect Internal 4 V CC18 3 V CCA 2 GND www.austriamicrosystems.com – + 200ms Pulse Generator – 200ms Delay + – + AS1922 Bandgap Reference Revision 1.00 V CC3 I OUT 1 RESETN ...
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... V CC CC18 CC3 CCA AS1920/AS1922 will assert a reset during powerup, powerdown and brownout conditions on one or all of the V inputs. Power Detect The AS1920/AS1922 is powered from the 3V input pin (V pin RESETN low as soon as the primary input pin is ≥1V or the secondary input pin is ≥1V. ...
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... To ensure threshold accuracy, set the parallel combination of ≤ 66.5kΩ R and www.austriamicrosystems.com RESETN V CC3 4 1.8V AS1920-18 V CC18 GND R CCA Input) CCA CC3 RESETN 4 AS1920-18 V CC18 CCA GND RESETN V CC3 4 AS1920-18 V CC18 2 3 GND R V CCA Revision 1.00 System Reset System Reset System Reset ...
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... Manual Reset Switch † Optional Resistor Recommended to Extend ESD Tolerance www.austriamicrosystems.com 2. RESETN V CC3 4 AS1920-18 1.8V V CC18 GND CCA TRIP CCA 2. 2.3V TRIP 1. CC3 100nF 130kΩ V CC18 100nF 0. CCA R 2 100kΩ 0.1% Revision 1.00 System Reset 1 System Reset RESETN AS1920-18 2 GND ...
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... AS1920/AS1922 Datasheet - Package Drawings and Markings The devices are available in an 5-pin SOT23 package. Figure 18. 5-pin SOT23 Package Notes: 1. All dimensions in millimeters. 2. Foot length measured at intercept point between datum A and lead surface. 3. Package outline exclusive of mold flash and metal burr. 4. Package outline inclusive of solder plating. ...
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... AS1920/AS1922 Datasheet - Tape and Reel Pin1 Orientation Figure 19. AS1920 Tape&Reel Pin1 Orientation Top, Through View SOT23-5 Figure 20. AS1922 Tape&Reel Pin1 Orientation Top, Through View SOT23-5 www.austriamicrosystems.com User direction of feed SOT23-5 SOT23-5 SOT23-5 User direction of feed SOT23-5 SOT23-5 SOT23-5 Revision 1. ...
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... AS1920/AS1922 Datasheet - Ordering Information The devices are available as the standard products shown in Table 5. Ordering Information Model Marking Triple-Voltage Supervisory Circuit: AS1920-18-T ASI1 3V, 1.8V, and Adjustable. Triple-Voltage Supervisory Circuit: AS1922-18-T ASI2 3V, 1.8V, and Adjustable. www.austriamicrosystems.com Table 5. Description Reset Type Push/Pull Open-Drain Revision 1.00 ...
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... 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, 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. ...