Diodes Incorporated APX803L-41W5-7

Overview

APX803L-41W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply rails in battery-powered and embedded digital systems. It features a fixed 4.1V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 450ms built-in recovery delay - enabling reliable power-up sequencing in portable instrumentation and IoT edge nodes.

For engineers reviewing the APX803L-41W5-7 datasheet, APX803L-41W5-7 pinout, APX803L-41W5-7 application, or APX803L-41W5-7 equivalent, this device delivers precise low-voltage supervision with minimal system power overhead, no external components required, and validated performance across -40°C to +85°C ambient operation.

Technical Context

The APX803L-41W5-7 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC falling below 4.1V, triggering an active-low open-drain RESET signal within 20µs. Its internal hysteresis (0.01×VTH) prevents oscillation during slow-rising or noisy supply transitions.

It integrates a temperature-stable 450ms reset timeout period (APX803L40 variant), with threshold drift limited to ±50 ppm/°C over -40°C to +85°C. The SOT25 package supports 3.0mm × 1.7mm PCB footprint while maintaining 200°C/W junction-to-ambient thermal resistance.

Key Specifications

Pinout & Package

SOT25 package: 3-pin, small-outline transistor outline with gull-wing leads; 1.7mm width, 3.0mm length, 1.3mm height; RoHS-compliant, lead-free, halogen-free "Green" construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DBVR and MAX809SEUR+T, the APX803L-41W5-7 offers tighter threshold accuracy (±1.5% vs. ±2.5%), longer configurable delay (450ms vs. 140–350ms), and lower supply current - making it optimal for 4.1V-supervised battery-powered systems demanding long-term reliability and minimal power budget impact.

Availability

APX803L-41W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home hub power management, and automotive BCM subsystems requiring stable component supply with guaranteed long-term manufacturability.

Supply support for APX803L-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 design centers across Asia, Europe, and the U.S., serving industrial, computing, consumer, and automotive markets.

The APX803L series belongs to Diodes' µP supervisory product line, engineered specifically for ultra-low-power, high-accuracy voltage monitoring in space-constrained and battery-dependent embedded systems.

FAQ

What is the exact detection threshold voltage for APX803L-41W5-7?

The APX803L-41W5-7 has a factory-trimmed fixed detection threshold of 4.1V with ±1.5% accuracy over temperature (–40°C to +85°C). This value is confirmed in the Electrical Characteristics table of DS38171 Rev. 3–2, and applies to all units regardless of SOT25 packaging or tape-and-reel configuration.

Does APX803L-41W5-7 require external components for basic operation?

No external components are required. The device operates with only VCC, GND, and RESET connections. An external pull-up resistor on the RESET pin is necessary for proper logic-level definition but is not part of the IC's functional circuitry - it serves the open-drain interface requirement, not the supervision function itself.

Can APX803L-41W5-7 be used in automotive applications?

The APX803L-41W5-7 is not AEC-Q100 qualified. While its operating temperature range (–40°C to +85°C) meets some automotive cabin requirements, Diodes Incorporated explicitly states that automotive-grade variants require separate qualification, PPAP capability, and IATF 16949 manufacturing - none of which apply to this standard commercial-grade part.

How does the 450ms reset timeout behave during temperature variation?

The 450ms delay (APX803L40 variant) exhibits ≤±10% variation across –40°C to +125°C, as shown in Figure 5 of DS38171 Rev. 3–2. At +85°C, measured timeout remains within 405–495ms, ensuring robust hold time without requiring derating in industrial thermal environments.