Diodes Incorporated APX803L-20W5-7

Overview

APX803L-20W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in embedded and battery-powered systems. It features a fixed 2.0V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms reset timeout delay. Used in portable instrumentation and low-power microcontroller power-up sequencing.

For engineers reviewing the APX803L-20W5-7 datasheet, APX803L-20W5-7 pinout, APX803L-20W5-7 application, or APX803L-20W5-7 equivalent, key selection criteria include threshold voltage tolerance, ultra-low quiescent current, reset delay timing stability over temperature, and SOT25 package compatibility with high-density PCB layouts.

Technical Context

The APX803L-20W5-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator triggers an open-drain RESET signal when VCC drops below 2.0V and holds it active until VCC exceeds 2.016V (typical release voltage).

Reset assertion occurs within 20µs of VCC falling below threshold, and the 220ms timeout is factory-trimmed and stable across -40°C to +85°C ambient range. No external components are required-only a 100nF bypass capacitor on VCC is recommended per typical application circuit.

Key Specifications

Pinout & Package

SOT25 (3-pin variant with two NC terminals) - compact 2.9mm × 1.6mm surface-mount package with exposed pad thermal enhancement and RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L20-29SR, the APX803L-20W5-7 offers identical electrical specs in a larger SOT25 package with NC pins-beneficial for thermal management and mechanical robustness in high-vibration environments; versus TLV803EA20DBZR, it trades 0.5µA lower ICC for Diodes' broader qualification history in industrial applications.

Availability

APX803L-20W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub controllers, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for APX803L-20W5-7 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 design centers in Asia, Europe, and the US, and manufacturing in ISO/TS 16949-certified facilities.

The APX803L series belongs to Diodes' Power Management portfolio, engineered specifically for high-accuracy, ultra-low-power reset supervision in battery-critical and space-constrained embedded systems.

FAQ

What is the exact reset timeout duration for APX803L-20W5-7?

The APX803L-20W5-7 has a nominal reset active timeout period of 220ms, measured from the moment VCC recovers above 1.02×VTH (2.04V) until RESET deasserts. This value is factory-trimmed and varies from 143ms (min) to 297ms (max) across temperature and process corners, as specified in the Electrical Characteristics table.

Can APX803L-20W5-7 drive a 10kΩ pull-up resistor to 5V?

Yes. The open-drain RESET output can sink up to 20mA (absolute max), and with VOL ≤ 0.4V at ISINK = 3.5mA, it easily drives a 10kΩ pull-up to 5V (resulting in ~0.5mA sink current). This ensures solid logic-low assertion while maintaining noise margin in noisy industrial environments.

Is the 2.0V threshold adjustable via external resistors?

No. The APX803L-20W5-7 uses an internally trimmed, fixed 2.0V detection threshold. It is not adjustable-no external resistor network or feedback path is supported. For adjustable thresholds, consider Diodes' APX809 series or similar programmable supervisors.

Does APX803L-20W5-7 require a bypass capacitor?

Yes. A 100nF ceramic capacitor must be placed between VCC and GND, as close as possible to the device pins. This stabilizes the internal reference and prevents false resets due to supply transients or high-frequency noise coupling into the threshold detection circuitry.