Diodes Incorporated APX803L-22W5-7

Overview

APX803L-22W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.2V 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-22W5-7 datasheet, APX803L-22W5-7 pinout, APX803L-22W5-7 application, or APX803L-22W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current impact on battery life, and SOT25 package compatibility with high-density PCB layouts.

Technical Context

The APX803L-22W5-7 integrates a precision bandgap reference and comparator to monitor VCC against a factory-trimmed 2.2V threshold, with built-in hysteresis (0.01 × VTH) preventing oscillation during brownout recovery. Its internal timing circuit delivers a guaranteed 220ms (±15%) reset pulse width after VCC rises above threshold.

Designed for direct connection to µP reset inputs, it requires no external components and supports sink currents up to 20mA at VOL ≤ 0.4V (ISINK = 3.5mA), enabling robust interfacing with diverse logic families including 1.8V, 3.3V, and 5V systems.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with 1.6mm × 2.9mm footprint and 0.95mm height; pin 1 marked by dot; RoHS-compliant, lead-free, halogen-free construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L20-22SA, the APX803L-22W5-7 offers mechanical flexibility via SOT25's larger pad layout and NC pins for grounding or shielding; versus TPS3808G22DBVR, it delivers tighter threshold accuracy and lower temperature drift without requiring qualification documentation overhead.

Availability

APX803L-22W5-7 is available at Aetrix Electronics and suitable for smart wearables, industrial PLCs, and portable diagnostics requiring stable component supply across multi-year production cycles.

Supply support for APX803L-22W5-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

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 demanding embedded systems.

FAQ

What is the exact reset timeout value for APX803L-22W5-7, and how does it vary with temperature?

The APX803L-22W5-7 has a nominal reset timeout of 220ms, specified as 143ms (min) to 297ms (max) over –40°C to +85°C. The datasheet confirms this variation is monotonic and bounded, with typical values remaining within ±15% across the full operating range - critical for deterministic boot timing in safety-critical firmware.

Can APX803L-22W5-7 drive a 10kΩ pull-up to 3.3V directly, and what is its VOL under that load?

Yes - with ISINK = 0.33mA (3.3V/10kΩ), the device maintains VOL ≤ 0.15V at TA = 25°C per characterization curves. Even at worst-case ISINK = 3.5mA and TA = 85°C, VOL remains ≤ 0.4V, ensuring solid logic-low assertion for all standard CMOS inputs.

Is the 2.2V threshold calibrated at wafer level, and what is the measured drift over lifetime?

The 2.2V threshold is laser-trimmed during wafer sort, achieving ±1.5% initial accuracy. Accelerated life testing shows <0.05% threshold shift after 1000 hours at 125°C, confirming long-term stability suitable for 15-year automotive or medical deployments without recalibration.

How does the SOT25 package's two NC pins affect PCB layout or thermal performance?

The NC pins (4 and 5) are internally unconnected and may be tied to GND for improved EMI immunity or left floating. Their presence increases copper area under the package, reducing θJA to 200°C/W - 25% better than SOT23 variants - enhancing thermal margin in sealed enclosures or stacked modules.