Diodes Incorporated APX803L-26W5-7

Overview

APX803L-26W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.6V threshold detection with ±1.5% accuracy, 1µA typical supply current, open-drain active-low reset output, and 220ms reset timeout. It monitors VCC in battery-powered embedded systems such as portable medical devices and IoT edge nodes.

For engineers reviewing the APX803L-26W5-7 datasheet, APX803L-26W5-7 pinout, APX803L-26W5-7 application, or APX803L-26W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, low-quiescent-current operation in sleep mode, and SOT25 package compatibility with high-density PCB layouts.

Technical Context

The APX803L-26W5-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its comparator drives an open-drain NMOS output stage capable of sinking ≥3.5mA at 0.4V drop.

Reset assertion occurs within 20µs when VCC falls below 2.6V, and release requires VCC to exceed 2.6V + hysteresis (≈2.626V). The 220ms timeout is factory-trimmed and exhibits <±10% variation across –40°C to +85°C ambient.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with 1.6mm × 2.9mm footprint and 0.95mm height; pin 1 = VCC, pin 2 = RESET, pin 3 = GND, pins 4–5 = NC (no connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB26DBVR and MAX809SEUR+T, the APX803L-26W5-7 delivers tighter threshold accuracy and matched 220ms delay in a 5-pin SOT25 package-enabling direct replacement in space-constrained industrial modules without sacrificing timing integrity or power efficiency.

Availability

APX803L-26W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub gateways, and asset tracking beacons requiring stable component supply across multi-year production cycles.

Supply support for APX803L-26W5-7 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 quality systems compliant with AEC-Q200 for automotive-grade reliability.

The APX803L series targets ultra-low-power supervisory functions in battery-operated and energy-harvesting systems, emphasizing sub-µA operation, factory-trimmed thresholds, and robust thermal performance for mission-critical reset assurance.

FAQ

What is the exact reset timeout for APX803L-26W5-7?

The APX803L-26W5-7 has a factory-set reset active timeout period of 220ms, measured from VCC falling below 2.6V until RESET returns high after VCC exceeds the release threshold (2.6V + hysteresis). This value is trimmed and tested per unit, with ±10% variation over –40°C to +85°C ambient temperature.

Can APX803L-26W5-7 monitor a 1.8V supply rail?

No. The APX803L-26W5-7 is configured for 2.6V detection and requires minimum VCC of 0.9V to operate, but its internal reference and comparator are optimized for reliable assertion at exactly 2.6V. Monitoring a 1.8V rail would require APX803L-18W5-7 or similar 1.8V variant.

Is the SOT25 package lead-free and RoHS-compliant?

Yes. The APX803L-26W5-7 uses a fully lead-free, halogen-free, and antimony-free SOT25 package conforming to EU RoHS Directive 2015/863/EU (RoHS 3), with bromine and chlorine content each <900ppm and antimony <1000ppm, verified per Diodes Incorporated's Green Product Definition.

How does the open-drain output interface with a 5V microcontroller?

The RESET pin is open-drain and active-low, so it requires an external pull-up resistor to the target MCU's VDD (e.g., 5V). When asserted, it sinks up to 3.5mA while maintaining ≤0.4V at the pin. No level-shifting is needed-the same pull-up defines the logic-high voltage seen by the MCU.