Diodes Incorporated APX803L20-41W5-7

Overview

APX803L20-41W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V 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 APX803L20-41W5-7 datasheet, APX803L20-41W5-7 pinout, APX803L20-41W5-7 application, or APX803L20-41W5-7 equivalent, this device supports critical low-power system initialization, brown-out protection, and deterministic reset timing in space-constrained embedded designs requiring stable 2.0V supply supervision.

Technical Context

The APX803L20-41W5-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 2.0V threshold, with built-in hysteresis (0.01×VTH) preventing oscillation during supply recovery. Its internal delay timer ensures reset remains asserted for exactly 220ms after VCC exceeds 1.02×VTH.

Operating from 0.9V to 5.5V supply, it features an open-drain RESET output capable of sinking 20mA, with fast 20µs response to VCC drop below threshold. The SOT25 package provides thermal resistance of 200°C/W (Junction-to-Ambient), supporting operation from –40°C to +85°C ambient.

Key Specifications

Pinout & Package

SOT25 is a 3-pin surface-mount package with gull-wing leads, 1.3mm body width, and 0.95mm maximum height-optimized for high-density PCB layouts and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L20-29SR, the W5 package offers superior thermal performance for sustained operation near +85°C; versus TLV803S20DBZR, the APX803L20-41W5-7 delivers factory-trimmed timing without component tolerance risk or layout sensitivity.

Availability

APX803L20-41W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home edge nodes, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for APX803L20-41W5-7 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 manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q200 for industrial reliability.

The APX803L series targets ultra-low-power supervisory functions in battery-operated and energy-constrained systems, emphasizing precision threshold accuracy, minimal supply current, and zero-external-component integration.

FAQ

What is the exact reset timeout for APX803L20-41W5-7?

The APX803L20-41W5-7 has a factory-programmed reset timeout of 220ms (typical), with guaranteed minimum 143ms and maximum 297ms across –40°C to +85°C ambient. This value is laser-trimmed during production and requires no external components.

Can APX803L20-41W5-7 monitor a 1.8V supply rail?

No. The APX803L20-41W5-7 is fixed at 2.0V threshold and cannot reliably supervise 1.8V rails. For 1.8V detection, Diodes offers APX803L18 variants (e.g., APX803L18-41W5-7), which provide identical package, current, and timing specs at 1.8V ±1.5%.

Is the RESET pin compatible with 5V logic systems?

Yes. The open-drain RESET output supports up to 5.5V pull-up voltage, allowing direct interface with 5V microcontrollers or FPGAs. The output sinks up to 20mA when active low, with VOL ≤ 0.4V at 3.5mA sink current.

Does APX803L20-41W5-7 require a bypass capacitor?

A 100nF ceramic capacitor between VCC and GND is recommended per the datasheet's typical application circuit to suppress high-frequency noise and ensure stable internal reference operation-especially in noisy industrial or switching regulator environments.