Diodes Incorporated APX803L05-27SA-7

Overview

APX803L05-27SA-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 55 ms reset timeout. It delivers active-low open-drain reset signaling in battery-powered IoT sensors, portable medical devices, and low-power microcontroller systems where supply integrity must be verified without burdening energy budgets.

For engineers reviewing the APX803L05-27SA-7 datasheet, APX803L05-27SA-7 pinout, APX803L05-27SA-7 application, or APX803L05-27SA-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay timing stability over temperature, open-drain sink capability (3.5 mA @ 0.4 V), and SOT23 package compatibility with high-density PCB layouts.

Technical Context

The APX803L05-27SA-7 implements a precision bandgap-based voltage reference and comparator architecture to monitor VCC against a fixed 2.7 V threshold. Its internal hysteresis (0.01 × VTH) prevents oscillation during slow-rising or noisy supply transitions.

Reset assertion occurs within 20 µs of VCC falling below 2.7 V, and release requires VCC to exceed 2.7 V + hysteresis. The 55 ms timeout is factory-trimmed and stable across –40°C to +85°C ambient, with <50 ppm/°C threshold drift.

Key Specifications

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 2.9 mm × 1.3 mm × 1.0 mm body, gull-wing leads, RoHS-compliant matte tin lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803E27DBZR and MAX809SEUR+T, the APX803L05-27SA-7 offers optimal balance of low ICC (1 µA), precise 55 ms timing, and direct SOT23-3 drop-in compatibility-making it ideal for space-constrained, battery-sensitive applications requiring deterministic reset behavior.

Availability

APX803L05-27SA-7 is available at Aetrix Electronics and suitable for wearable health monitors, smart home sensor nodes, industrial PLC I/O modules, and automotive body control modules requiring stable component supply across production lifecycles.

Supply support for APX803L05-27SA-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 solutions for power management, signal integrity, and protection applications.

The APX803L series belongs to Diodes' precision voltage supervisor product line, engineered specifically for ultra-low-power, high-accuracy power monitoring in portable and embedded systems where reliability and energy efficiency are critical.

FAQ

What is the exact reset threshold voltage and tolerance for APX803L05-27SA-7?

The APX803L05-27SA-7 has a nominal reset threshold of 2.7 V with a guaranteed tolerance of ±1.5% over temperature (–40°C to +85°C), corresponding to 2.6595 V to 2.7405 V. This is factory-trimmed and does not require external calibration.

Can APX803L05-27SA-7 monitor a 1.8 V supply rail?

No - the device requires VCC ≥ 0.9 V to operate, but its internal 2.7 V threshold is fixed and cannot be adjusted. To supervise a 1.8 V rail, an external resistor divider would be needed, which defeats the purpose of its integrated precision reference; a 1.8 V threshold variant (e.g., APX803L18-xx) should be selected instead.

Is the RESET pin compatible with 5 V logic systems?

Yes - the open-drain RESET output supports pull-up voltages up to 5.5 V, allowing direct interface with 3.3 V or 5 V logic families. When asserted, it sinks up to 3.5 mA with VOL ≤ 0.4 V at ISINK = 3.5 mA, ensuring solid low-level signaling across both voltage domains.

Does APX803L05-27SA-7 meet AEC-Q100 for automotive use?

No - this specific variant is not AEC-Q100 qualified. Diodes offers automotive-grade versions (e.g., APX803L05-27SA-7Q) with PPAP support and IATF 16949 manufacturing, but the standard APX803L05-27SA-7 is intended for industrial and consumer applications.