Diodes Incorporated APX803L05-20SA-7

Overview

APX803L05-20SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 5.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in SOT23-3 package. It delivers active-low open-drain reset signaling for power monitoring in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the APX803L05-20SA-7 datasheet, APX803L05-20SA-7 pinout, APX803L05-20SA-7 application, or APX803L05-20SA-7 equivalent, this device supports critical low-power system initialization, brown-out protection, and reliable reset assertion timing across -40°C to +85°C ambient conditions.

Technical Context

The APX803L05-20SA-7 integrates a precision bandgap reference and comparator with built-in hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its internal fixed 5.0V detection threshold is laser-trimmed at wafer level, ensuring ±1.5% initial accuracy over temperature.

It features a factory-programmed 220ms reset timeout (typical), operates from 0.9V to 5.5V supply, and asserts reset within 20µs of VCC falling below 5.0V. The open-drain output sinks up to 20mA and requires no external components for basic operation.

Key Specifications

Pinout & Package

SOT23-3 package: 3-pin, ultra-small outline transistor (SOT) with gull-wing leads, JEDEC TO-236AB compliant, 1.3mm × 2.9mm body size, 0.95mm height, and 0.95mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3808G50DBVR and MAX809SEUR+T, the APX803L05-20SA-7 offers lowest quiescent current (1µA typ.), smallest footprint (SOT23-3), and guaranteed 220ms delay without external components-making it optimal for space-constrained, battery-sensitive designs.

Availability

APX803L05-20SA-7 is available at Aetrix Electronics and suitable for smart wearables, portable medical instruments, and industrial I/O modules requiring stable component supply with long-term manufacturability.

Supply support for APX803L05-20SA-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the US.

The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-critical and space-constrained embedded systems.

FAQ

What is the exact reset timeout value for APX803L05-20SA-7?

The APX803L05-20SA-7 has a factory-programmed reset timeout of 220ms (typical), with min/max values of 143ms and 297ms respectively across temperature and process variation. This value is fixed internally and requires no external components to set.

Can APX803L05-20SA-7 operate from a 3.3V supply?

Yes - the APX803L05-20SA-7 operates over VCC = 0.9V to 5.5V, so it functions correctly from a 3.3V supply while still detecting drops below its 5.0V threshold. Its internal reference remains stable regardless of VCC within this range.

Is the RESET pin truly open-drain, and what pull-up voltage is supported?

Yes, the RESET pin is a true open-drain NMOS output rated for 6.0V maximum voltage. It supports pull-up to any logic rail ≤5.5V (e.g., 1.8V, 3.3V, or 5V), enabling flexible interfacing with diverse µP reset inputs.

Does APX803L05-20SA-7 include hysteresis, and how much?

Yes - it incorporates built-in hysteresis of 0.01×VTH (50mV at 5.0V threshold), defined as the difference between rising and falling detection thresholds. This prevents chatter during slow VCC recovery near the trip point.