Diodes Incorporated APX803L-22SA-7

Overview

APX803L-22SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.2V threshold detection with ±1.5% accuracy, 1µA typical supply current, and 220ms reset timeout. It features open-drain active-low RESET output and operates across -40°C to +85°C ambient range in battery-powered embedded systems.

For engineers reviewing the APX803L-22SA-7 datasheet, APX803L-22SA-7 pinout, APX803L-22SA-7 application, or APX803L-22SA-7 equivalent, key selection criteria include fixed 2.2V detection level, SOT23-3 package compatibility, 220ms recovery delay, and low-quiescent-current supervision for portable microcontroller power monitoring.

Technical Context

The APX803L-22SA-7 implements a precision bandgap-based voltage reference with internal hysteresis (0.01×V_TH) to prevent oscillation during V_CC transitions near threshold. Its comparator drives an open-drain output stage capable of sinking ≥3.5mA at 0.4V drop.

Reset assertion occurs within 20µs when V_CC falls below 2.2V, and release requires V_CC to exceed 2.2V by hysteresis margin. The 220ms timeout variant (indicated by "20" in part number) is factory-programmed and temperature-stable across -40°C to +85°C.

Key Specifications

Pinout & Package

SOT23-3 package (JEDEC TO-236AB), 1.3mm × 2.9mm footprint, 1.45mm height, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803SDBZR and MAX809SEUR+T, the APX803L-22SA-7 delivers optimal balance of ultra-low ICC (1µA), precise 220ms timing alignment with common µP requirements, and ±1.5% threshold accuracy-making it preferred for space-constrained, battery-sensitive industrial and portable designs.

Availability

APX803L-22SA-7 is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, and smart metering systems requiring stable component supply with long-term manufacturability.

Supply support for APX803L-22SA-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 connectivity applications.

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

FAQ

What is the exact detection threshold voltage for APX803L-22SA-7?

The APX803L-22SA-7 has a factory-set detection threshold of 2.2V with guaranteed accuracy of ±1.5% over -40°C to +85°C ambient temperature. This value is trimmed during production using Diodes' proprietary bandgap reference calibration and does not require external components.

Can APX803L-22SA-7 be used with a 1.8V supply rail?

No - the APX803L-22SA-7 requires minimum V_CC of 0.9V to operate, but its 2.2V detection threshold means it cannot supervise rails below 2.2V. For 1.8V systems, use APX803L-18SA-7 (1.8V threshold) instead.

Is the RESET output compatible with 5V logic systems?

Yes - the open-drain RESET pin supports pull-up voltages up to 5.5V, allowing direct interface with 5V microcontrollers or FPGAs. The output sinks ≥3.5mA while maintaining ≤0.4V low-level voltage under full load.

Does APX803L-22SA-7 include hysteresis, and what is its value?

Yes - it features built-in hysteresis of 0.01×V_TH, equal to 22mV for the 2.2V threshold. This prevents output chatter during slow V_CC recovery and ensures clean, glitch-free reset deassertion.