Diodes Incorporated APX803L-29W5-7

Overview

APX803L-29W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.9V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 220ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C in battery-powered IoT sensors and portable medical devices.

For engineers reviewing the APX803L-29W5-7 datasheet, APX803L-29W5-7 pinout, APX803L-29W5-7 application, or APX803L-29W5-7 equivalent, this page delivers verified electrical specs, SOT25 package mapping, functional pin roles, real-world use cases in power monitoring, and validated alternative parts with documented timing and threshold differences.

Technical Context

The APX803L-29W5-7 implements a fixed-threshold, hysteresis-enabled voltage monitor with internal 2.9V detection set at factory (0.1V step resolution), delivering 20µs fast reset assertion upon VCC drop below threshold. Its open-drain output requires external pull-up and supports sink currents up to 20mA.

It integrates a temperature-compensated bandgap reference (50 ppm/°C drift) and offers factory-programmed 220ms recovery delay-no external RC components needed. The device meets RoHS, halogen-free, and antimony-free "Green" compliance per Diodes Incorporated's definitions.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with pin 1 = VCC, pin 2 = RESET, pin 3 = GND, pins 4–5 = NC (no connection). Compact 2.9mm × 2.8mm footprint ideal for space-constrained PCB layouts in handheld instruments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L-29W5-7, the SA variant saves board area but sacrifices pin routing headroom, while the TLV803EB29DBVR improves accuracy and quiescent current at the cost of reduced low-voltage operability and vendor lock-in.

Availability

APX803L-29W5-7 is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld scanners, smart home hubs, and wireless sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for APX803L-29W5-7 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 in Asia, Europe, and the U.S., serving industrial, computing, and consumer markets.

The APX803L series targets ultra-low-power supervisory functions in battery-critical systems, emphasizing microamp-level current consumption, factory-set thresholds, and robust thermal performance from –40°C to +85°C.

FAQ

What is the exact reset threshold voltage for APX803L-29W5-7?

The APX803L-29W5-7 has a factory-trimmed reset threshold of 2.9V with ±1.5% accuracy over temperature (–40°C to +85°C), confirmed in Electrical Characteristics Table on page 4 of DS38171 Rev. 3-2. This value is fixed and not adjustable via external components.

Can APX803L-29W5-7 drive a 10kΩ pull-up resistor to 3.3V reliably?

Yes. With VOL ≤ 0.4V at ISINK = 3.5mA (per datasheet p.4), the device easily sinks >300µA into a 10kΩ pull-up to 3.3V (330µA), ensuring solid logic-low assertion and noise margin >2.9V on the reset line.

Does APX803L-29W5-7 require an external capacitor on VCC?

Yes. A 100nF ceramic decoupling capacitor is required between VCC and GND, placed as close as possible to pins 1 and 3, as shown in the Typical Applications Circuit (p.3 of DS38171). This stabilizes the internal reference and prevents false resets from supply transients.

Is the SOT25 package of APX803L-29W5-7 compatible with standard SOT23 footprints?

No. SOT25 is a 5-pin package (2.9mm × 2.8mm), whereas SOT23 is 3-pin (2.9mm × 1.6mm). Pin 1 alignment differs, and pins 4–5 are NC in SOT25 but absent in SOT23. Mechanical redesign is required for footprint interchangeability.