Diodes Incorporated APX803L05-46SR-7

Overview

APX803L05-46SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 4.6V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 55ms 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 monitors.

For engineers reviewing the APX803L05-46SR-7 datasheet, APX803L05-46SR-7 pinout, APX803L05-46SR-7 application, or APX803L05-46SR-7 equivalent, this page delivers verified electrical parameters, SOT23R package mapping, functional pin roles, real-world supervisory use cases, and validated alternative parts for power-rail monitoring in space-constrained embedded systems.

Technical Context

The APX803L05-46SR-7 implements a fixed-threshold voltage monitor with internal 4.6V detection set at factory (0.1V step), hysteresis of 0.01×VTH, and temperature coefficient of 50 ppm/°C. Its comparator-based architecture triggers reset within 20µs when VCC drops below threshold and holds reset until VCC exceeds VTH + hysteresis.

It uses an open-drain NMOS output stage capable of sinking ≥3.5mA at 0.4V low-level voltage, requires no external components, and supports stable operation from 0.9V to 5.5V supply while maintaining 1µA quiescent current across –40°C to +85°C ambient.

Key Specifications

Pinout & Package

SOT23R (3-pin) package with 1.3mm × 2.9mm footprint, 0.95mm height, and gull-wing leads - optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G01DBVR and MAX809SEUR+T, the APX803L05-46SR-7 delivers superior energy efficiency (1µA vs. 2.5–12µA), tighter threshold accuracy (±1.5% vs. ±2%), and optimal 55ms reset duration for fast-boot µP systems - making it ideal for next-generation ultra-low-power edge devices.

Availability

APX803L05-46SR-7 is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor nodes, industrial PLC I/O modules, and portable diagnostic tools requiring stable component supply across long production cycles.

Supply support for APX803L05-46SR-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 emphasis on power management, signal integrity, and protection devices.

The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power-rail monitoring in battery-critical and space-constrained embedded applications.

FAQ

What is the exact reset threshold voltage for APX803L05-46SR-7?

The APX803L05-46SR-7 has a factory-trimmed fixed reset threshold of 4.6V with ±1.5% accuracy over –40°C to +85°C ambient temperature. This value is confirmed in the Electrical Characteristics table (VTH parameter) of DS38171 Rev. 3–2, and applies under recommended operating conditions with VCC ≥ 0.9V.

Does APX803L05-46SR-7 require an external pull-up resistor on the RESET pin?

Yes - the RESET pin is open-drain and active-low, so an external pull-up resistor (typically 10kΩ to VCC or host rail) is mandatory to generate a valid logic-high level when not asserted. The datasheet's Typical Applications Circuit explicitly shows this configuration with a pull-up to VCC.

Can APX803L05-46SR-7 operate from a 1.8V supply?

No - the minimum recommended VCC is 0.9V, but the 4.6V threshold requires the monitored rail to be ≥4.6V. The device itself draws power from the same rail it supervises; therefore, it cannot function on a 1.8V supply because VCC must meet or exceed the detection threshold to enable internal circuitry.

Is APX803L05-46SR-7 RoHS and REACH compliant?

Yes - APX803L05-46SR-7 is fully RoHS 3 (2015/863/EU) compliant, lead-free, halogen-free, and antimony-free per Diodes Incorporated's "Green" definition (<900ppm Br, <900ppm Cl, <1000ppm Sb). Compliance documentation is published at diodes.com/quality/lead-free/.