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Description

The APX803S is used for microprocessor (µP) supervisory circuits to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5.0V, 3.3V, 3.0V and 2.5V powered circuits.

These circuits perform a single function: they assert a reset signal on power up and whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for a fixed period of time after VCC has risen above the reset threshold. For the APX803S this period is a minimum of 1ms while for other APX803S variants it is at least 140ms. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1V.

The APX803S is available with different reset thresholds suitable for operation with a variety of supply voltages. The APX803S has an open drain active low output and compliment Diodes APX809S/810S which have push-pull output stages. Low supply current makes the APX803S ideal for use in portable equipment. The APX803S is available in two pin out variants of the 3-pin SOT23 package.

Application

  • Computers
  • Controllers
  • Intelligent Instruments
  • Critical µP and µC Power Monitoring
  • Portable/Battery Powered Equipment

Features

  • Open-drain, Active Low
  • Power-On/Power Supply Glitch Reset Pulse
  • 10µA Supply Current (Typ.)
  • Guaranteed Reset Valid to VCC = 1V

Product Specifications

Product Parameters

Fixed Detect Voltages 2.25, 2.63, 2.93, 3.08, 4, 4.38, 4.63 V
Adjustable Detect voltage reference voltage N/A V
Number of Channels N/A
Minimum Operating Voltage 1 V
Maximum Input 5.5 V
Quiescent Current 10 µA
Typical Time Delay 50, 1.7, 240 µs
Reset Period N/A ms
RESET Output (Active High) No (Active High)
RESET Output (Active Low) Yes (Active Low)
Manual RESET No
Watchdog No
Watchdog Time None s
Power Fail Comparator Threshold None V
Reset Output Topology Open-Drain
Ambient Temperature Range -40 to 85

Related Content

Packages
SOT23

Applications

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

Request Documents
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
APX803S-23SA-7 Mouser Electronics Inc. 2850 8/11/2020 Buy Now United States
APX803S-23SR-7 Avnet Asia 3000 8/11/2020 Buy Now Hong Kong
APX803S-23SR-7 Mouser Electronics Inc. 3000 8/11/2020 Buy Now United States
APX803S-26SA-7 Arrow Electronics 375 8/11/2020 Buy Now United States
APX803S-26SA-7 Mouser Electronics Inc. 6926 8/11/2020 Buy Now United States
APX803S-26SA-7 Rutronik GmbH 24000 8/11/2020 Buy Now Germany
APX803S-26SA-7 Future Electronics - Asia 12000 8/10/2020 Singapore
APX803S-26SR-7 Mouser Electronics Inc. 2650 8/11/2020 Buy Now United States
APX803S-29SA-7 Digi-Key Electronics 1952 8/11/2020 Buy Now United States
APX803S-29SA-7 Mouser Electronics Inc. 3363 8/11/2020 Buy Now United States
APX803S-29SR-7 Avnet EU 3000 8/11/2020 Buy Now Germany
APX803S-29SR-7 Mouser Electronics Inc. 1360 8/11/2020 Buy Now United States
APX803S-31SA-7 Arrow Electronics 1326 8/11/2020 Buy Now United States
APX803S-31SA-7 Digi-Key Electronics 7987 8/11/2020 Buy Now United States
APX803S-31SA-7 Mouser Electronics Inc. 13671 8/11/2020 Buy Now United States
APX803S-31SA-7 Future Electronics 3000 8/10/2020 Buy Now Canada
APX803S-31SA-7-55 Arrow/Components Agent Ltd. 3000 8/11/2020 Buy Now Hong Kong
APX803S-31SR-7 Mouser Electronics Inc. 3197 8/11/2020 Buy Now United States
APX803S-40SA-7 Mouser Electronics Inc. 3000 8/11/2020 Buy Now United States
APX803S-40SR-7 Mouser Electronics Inc. 2900 8/11/2020 Buy Now United States
APX803S-44SA-7 Arrow Electronics 2600 8/11/2020 Buy Now United States
APX803S-44SA-7 Mouser Electronics Inc. 1773 8/11/2020 Buy Now United States
APX803S-44SR-7 Mouser Electronics Inc. 1930 8/11/2020 Buy Now United States
APX803S-46SA-7 Avnet EU 3000 8/11/2020 Buy Now Germany
APX803S-46SA-7 Mouser Electronics Inc. 2852 8/11/2020 Buy Now United States
APX803S-46SR-7 Mouser Electronics Inc. 2996 8/11/2020 Buy Now United States
APX803S00-23SA-7 Mouser Electronics Inc. 2658 8/11/2020 Buy Now United States
APX803S00-26SA-7 Mouser Electronics Inc. 2800 8/11/2020 Buy Now United States
APX803S00-29SA-7 Mouser Electronics Inc. 1880 8/11/2020 Buy Now United States
APX803S00-29SR-7 Avnet EU 6000 8/11/2020 Buy Now Germany
APX803S00-29SR-7 Arrow Electronics Central EU 3000 8/11/2020 Buy Now Germany
APX803S00-29SR-7 Digi-Key Electronics 56380 8/11/2020 Buy Now United States
APX803S00-29SR-7 Mouser Electronics Inc. 11563 8/11/2020 Buy Now United States
APX803S00-29SR-7 Future Electronics - Asia 6000 8/10/2020 Singapore
APX803S00-31SA-7 Mouser Electronics Inc. 2964 8/11/2020 Buy Now United States
APX803S00-31SR-7 Mouser Electronics Inc. 2870 8/11/2020 Buy Now United States
APX803S00-44SA-7 Mouser Electronics Inc. 296 8/11/2020 Buy Now United States
APX803S00-44SR-7 Mouser Electronics Inc. 2883 8/11/2020 Buy Now United States
APX803S00-46SA-7 Arrow Electronics Central EU 3000 8/11/2020 Buy Now Germany
APX803S00-46SA-7 Mouser Electronics Inc. 1585 8/11/2020 Buy Now United States
APX803S05-26SR-7 Mouser Electronics Inc. 2990 8/11/2020 Buy Now United States
APX803S05-29SA-7 Arrow Electronics Central EU 3000 8/11/2020 Buy Now Germany
APX803S05-29SA-7 Mouser Electronics Inc. 463 8/11/2020 Buy Now United States
APX803S05-29SR-7 Arrow Electronics Central EU 3000 8/11/2020 Buy Now Germany
APX803S05-29SR-7 Mouser Electronics Inc. 2737 8/11/2020 Buy Now United States
APX803S05-31SA-7 Mouser Electronics Inc. 455 8/11/2020 Buy Now United States
APX803S05-40SA-7 Mouser Electronics Inc. 2868 8/11/2020 Buy Now United States
APX803S05-46SA-7 Mouser Electronics Inc. 2705 8/11/2020 Buy Now United States

PCNs

Product Change Notices

PCN # Issue Date Subject
PCN-2348 2018-07-19 Additional Qualified Assembly/Test (A/T) Site for Select Devices

FAQs

Related Application FAQs