Diodes Incorporated APX803L-27SA-7

Overview

APX803L-27SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.7 V threshold detection with ±1.5% accuracy, 1 µA typical supply current, and 220 ms reset timeout. It features open-drain active-low RESET output and operates across –40°C to +85°C in SOT23-3 package-used in battery-powered IoT sensors and portable medical devices requiring reliable power-on reset.

For engineers reviewing the APX803L-27SA-7 datasheet, APX803L-27SA-7 pinout, APX803L-27SA-7 application, or APX803L-27SA-7 equivalent, this page delivers verified specifications, validated pin functions, confirmed SOT23-3 package mapping, real-world use cases in low-power embedded systems, and two technically documented alternative parts with explicit functional differences.

Technical Context

The APX803L-27SA-7 implements a fixed-threshold voltage monitor with internal 2.7 V reference (±1.5% over temperature), hysteresis of 0.01×VTH, and fast 20 µs response to VCC drop below threshold. Its open-drain RESET output sinks up to 20 mA and requires an external pull-up for system-level reset assertion.

It integrates no external components, supports 0.9–5.5 V supply range, and delivers stable detection performance across –40°C to +85°C ambient, with supply current remaining ≤2.5 µA (max) over full operating conditions.

Key Specifications

Pinout & Package

SOT23-3 package: ultra-compact 2.9 mm × 1.3 mm × 1.0 mm body with gull-wing leads, RoHS-compliant, lead-free, halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EA27DBZR and MAX809SEUR+T, the APX803L-27SA-7 delivers tighter threshold accuracy (±1.5% vs. ±2.0%/±2.5%) at lower cost than MAX809 while maintaining sub-µA efficiency closer to TLV803-making it optimal for new designs balancing precision, power, and BOM cost.

Availability

APX803L-27SA-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 with guaranteed long-term manufacturability.

Supply support for APX803L-27SA-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 ICs, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for automotive-grade reliability.

The APX803L series belongs to Diodes' precision power-supervision product line, engineered specifically for ultra-low-power, high-accuracy reset generation in battery-constrained and noise-sensitive embedded systems.

FAQ

What is the exact reset threshold voltage and accuracy for APX803L-27SA-7?

The APX803L-27SA-7 has a factory-set reset threshold of 2.7 V with ±1.5% accuracy over –40°C to +85°C ambient temperature. This means the actual trip point falls between 2.6595 V and 2.7405 V under specified conditions, confirmed in Electrical Characteristics table of DS38171 Rev. 3–2.

Does APX803L-27SA-7 require external components to function?

No. The APX803L-27SA-7 operates autonomously with only VCC, GND, and RESET connections. An external pull-up resistor on the RESET pin is required for system-level reset signaling, but no capacitors, resistors, or trimming components are needed for basic supervision functionality.

What is the meaning of "SA" and "-7" in APX803L-27SA-7?

"SA" denotes the SOT23-3 package variant per Diodes' ordering nomenclature; "-7" specifies 7-inch tape-and-reel packaging with 3,000 units per reel. The "27" indicates the 2.7 V reset threshold, and the absence of "05", "20", or "40" confirms the default 0 ms delay option-though APX803L-27SA-7 uses the 220 ms timeout variant per Marking Information Table (A427 code).

Can APX803L-27SA-7 drive a microcontroller's reset pin directly?

Yes. Its open-drain RESET output sinks up to 20 mA and interfaces directly with standard CMOS reset inputs. A pull-up resistor (typically 10–100 kΩ to VCC or logic rail) is required; the 220 ms timeout ensures compliance with most MCU reset hold-time specifications without additional timing circuitry.