Diodes Incorporated APX803L20-23W5-7

Overview

APX803L20-23W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.3V threshold detection with ±1.5% accuracy, 220ms reset timeout, and 1µA typical supply current in a 3-pin SOT25 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 APX803L20-23W5-7 datasheet, APX803L20-23W5-7 pinout, APX803L20-23W5-7 application, or APX803L20-23W5-7 equivalent, this page provides verified technical context, real-world timing behavior, package-specific pin validation, and validated alternative options for low-power system supervision.

Technical Context

The APX803L20-23W5-7 implements a fixed-threshold voltage detector with internal 2.3V reference (±1.5% over temperature), hysteresis of 0.01×VTH, and temperature coefficient of 50 ppm/°C. Its reset assertion occurs within 20µs when VCC drops below 2.3V, and recovery requires VCC to exceed 2.3V + hysteresis before release.

This variant integrates a factory-programmed 220ms reset timeout (min 143ms, max 297ms over temperature), operates from 0.9V to 5.5V supply, and features an open-drain RESET output capable of sinking 3.5mA at 0.4V low-level voltage - enabling direct interface with µP reset inputs without external pull-up constraints.

Key Specifications

Pinout & Package

SOT25 (3-pin, 1.6mm × 2.8mm, 0.95mm height) with exposed pad for thermal performance; RoHS-compliant, halogen-free, lead-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G23DBVR and MAX809SEUR+T, the APX803L20-23W5-7 delivers tighter threshold accuracy (±1.5% vs. ±2.5%), lower supply current (1µA vs. ≥10µA), and guaranteed 220ms timeout - making it optimal for long-life, precision-critical edge nodes where SOT25 mechanical robustness is advantageous.

Availability

APX803L20-23W5-7 is available at Aetrix Electronics and suitable for smart wearable sensors, portable medical monitors, and industrial edge controllers requiring stable component supply with full traceability and lifecycle management.

Supply support for APX803L20-23W5-7 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 ICs, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for automotive-grade reliability.

The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-constrained and thermally variable environments.

FAQ

What is the exact reset timeout value for APX803L20-23W5-7?

The APX803L20-23W5-7 has a nominal reset active timeout of 220ms, with guaranteed minimum and maximum values of 143ms and 297ms respectively across -40°C to +85°C ambient temperature. This is factory-programmed and does not require external timing components.

Can APX803L20-23W5-7 operate from a 1.2V supply?

No. The APX803L20-23W5-7 requires a minimum supply voltage of 0.9V to power its internal circuitry, but its 2.3V detection threshold means it cannot supervise a 1.2V rail. It is intended for monitoring 2.3V+ supply domains such as 3.3V or 5V systems.

Is the RESET pin compatible with 5V logic systems?

Yes. The open-drain RESET output supports up to 6.0V absolute maximum voltage and can be pulled up to 5V, enabling direct interface with 5V µPs or FPGAs. The VOL specification remains ≤0.4V at 3.5mA sink current, ensuring solid logic-low recognition.

Does APX803L20-23W5-7 require an external capacitor for stability?

A 100nF ceramic decoupling capacitor is required between VCC and GND per the datasheet's typical application circuit. This stabilizes the internal reference and prevents false resets during fast supply transients; no timing capacitor is needed as the 220ms delay is fully internal.