Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT23
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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.
Fixed Detect Voltages (V) |
2.25, 2.63, 2.93, 3.08, 4, 4.38, 4.63 V |
|---|---|
Adjustable Detect Voltage Reference Voltage (V) |
N/A V |
Number of Channels |
N/A |
Minimum Operating Voltage (V) |
1 V |
Maximum Input Voltage (V) |
5.5 V |
Quiescent Current (µA) |
10 µA |
Typical Time Delay (µs) |
50, 1.7, 240 µs |
Reset Period (ms) |
N/A ms |
RESET Output (Active High) |
No (Active High) |
RESET Output (Active Low) |
Yes (Active Low) |
Manual RESET |
No |
Watchdog |
No |
Watchdog Time (s) |
None s |
Power Fail Comparator Threshold (V) |
None V |
Reset Output Topology |
Open-Drain |
Ambient Temperature Range (°C) |
-40 to 85 °C |
Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents
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A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.
| PCN # | Issue Date | Implementation Date | Subject |
|---|---|---|---|
| PCN-2770 | 2025-10-30 | 2025-10-30 | Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products |
