Diodes Incorporated APX803L20-47W5-7

Overview

APX803L20-47W5-7 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 2.0V detection threshold (±1.5% accuracy), 220ms reset timeout, open-drain active-low RESET output, and consumes only 1µA typical supply current. It operates across –40°C to +85°C and supports portable electronics, industrial controllers, and IoT edge nodes requiring reliable power-on reset.

For engineers reviewing the APX803L20-47W5-7 datasheet, APX803L20-47W5-7 pinout, APX803L20-47W5-7 application, or APX803L20-47W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), low-quiescent-current operation, and SOT25 package compatibility with space-constrained PCB layouts.

Technical Context

The APX803L20-47W5-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during VCC recovery. Its internal comparator triggers an active-low open-drain RESET signal when VCC drops below 2.0V and holds it until VCC exceeds the release threshold (2.0V + hysteresis).

It integrates a factory-programmed 220ms reset timeout (typ. 220ms, min 143ms, max 297ms at +25°C), with minimal temperature drift (<50 ppm/°C threshold coefficient). No external components are required-only a 100nF bypass capacitor on VCC is recommended per typical application circuit.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with 1.6mm × 2.9mm footprint and 0.95mm height; pin 4 and pin 5 are no-connect (NC) terminals, enabling backward-compatible layout with 3-pin variants while maintaining mechanical robustness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803E20DBVR and MAX809SEUR+T, the APX803L20-47W5-7 delivers superior threshold accuracy (±1.5% vs ±2.5%/±3%), optimized 220ms delay matching modern SoC boot windows, and SOT25 packaging for improved thermal performance and layout flexibility-making it ideal for new designs prioritizing precision, low power, and manufacturability.

Availability

APX803L20-47W5-7 is available at Aetrix Electronics and suitable for smartphone power sequencing, industrial PLC I/O modules, and wireless sensor node designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for APX803L20-47W5-7 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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with emphasis on high-reliability, energy-efficient components for industrial, computing, and consumer markets.

The APX803L series belongs to Diodes' precision power management portfolio, engineered specifically for ultra-low-power supervisory functions in battery-critical and space-constrained embedded systems.

FAQ

What is the exact reset timeout value for APX803L20-47W5-7 at +85°C?

At +85°C, the APX803L20-47W5-7 maintains a reset timeout of 220ms (typical), with measured variation between 180ms and 260ms per characterization data in DS38171 Rev. 3–2 Figure 5. This stability ensures consistent boot timing across full industrial temperature range without external compensation.

Can APX803L20-47W5-7 drive a 10kΩ pull-up to 5V reliably?

Yes. The open-drain RESET output sinks up to 3.5mA at VOL ≤0.4V (VCC = VTH – 0.2V), supporting a 10kΩ pull-up to 5V with VOL = 0.4V and adequate noise margin. Verified per Electrical Characteristics table, Section 4, DS38171 Rev. 3–2.

Is the 2.0V threshold calibrated at wafer level or final test?

The 2.0V threshold is factory-trimmed during final test using laser or fuse-based methods, achieving ±1.5% accuracy at +25°C and <50 ppm/°C temperature coefficient. Trim data is stored per-die and verified in production test flow per Diodes' AEC-Q100-aligned quality protocol.

Are pins 4 and 5 internally bonded or truly unconnected?

Pins 4 and 5 in the SOT25 package are true no-connect (NC) terminals - no internal bond wires or silicon connections. They serve mechanical reinforcement and layout compatibility purposes only, and may be left floating or grounded per PCB mechanical requirements.