Diodes Incorporated APX803L-46SA-7

Overview

APX803L-46SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply integrity in battery-powered and embedded digital systems. It features a fixed 4.6V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 220ms built-in recovery delay - enabling reliable power-on reset and brownout protection in portable instrumentation and IoT edge nodes.

For engineers reviewing the APX803L-46SA-7 datasheet, APX803L-46SA-7 pinout, APX803L-46SA-7 application, or APX803L-46SA-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes' DS38171 Rev. 3–2 specification and production marking data.

Technical Context

The APX803L-46SA-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator triggers an open-drain RESET signal when VCC drops below 4.6V and holds it low until VCC exceeds 4.6V + hysteresis, with guaranteed 20µs response time from undervoltage event to RESET assertion.

This variant uses the SOT23-3 package with SA suffix, configured for 220ms timeout ('20' in part number), and operates across –40°C to +85°C ambient. No external components are required - the device integrates all timing and sensing functions on-die, eliminating capacitor-based delay networks.

Key Specifications

Pinout & Package

SOT23-3 (SA variant) package: 3-pin surface-mount, 1.3mm × 2.9mm footprint, 1.45mm height, JEDEC MO-178 compliant, RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803E46DBVR and MAX809SEUR+T, the APX803L-46SA-7 delivers optimal balance of ultra-low ICC (1µA), production-proven 220ms timing, and industrial-grade accuracy (±1.5%) - making it ideal for cost-sensitive, battery-operated edge devices where long service life and predictable reset behavior are critical.

Availability

APX803L-46SA-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home gateways, and automotive body control modules requiring stable component supply and consistent parametric performance across production lots.

Supply support for APX803L-46SA-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 in Asia, Europe, and the U.S., and manufacturing in ISO/TS 16949-certified facilities.

The APX803L series belongs to Diodes' Power Management portfolio, engineered specifically for high-accuracy, ultra-low-power voltage supervision in space- and energy-constrained embedded systems - emphasizing reliability, small footprint, and minimal external component count.

FAQ

What is the exact detection threshold voltage for APX803L-46SA-7?

The APX803L-46SA-7 has a factory-trimmed detection threshold of 4.6V with ±1.5% accuracy over –40°C to +85°C ambient. This value is fixed internally and does not require external resistors or configuration. The hysteresis is 0.01×VTH (≈46mV), ensuring stable release above 4.646V.

Can APX803L-46SA-7 operate with a 3.3V supply rail?

Yes - the device operates with VCC from 0.9V to 5.5V and monitors that same rail. When used on a 3.3V system, it will assert RESET if VCC falls below 4.6V; however, since 4.6V > 3.3V, it will remain continuously asserted. Therefore, it is only suitable for monitoring rails ≥4.6V, such as 5V or higher.

Is a pull-up resistor required on the RESET pin?

Yes - the RESET pin is open-drain and requires an external pull-up resistor to a valid logic voltage (e.g., VCC or IOVDD). Typical values range from 10kΩ to 100kΩ. Without pull-up, the output cannot drive a high logic level, rendering the reset signal non-functional in most µP interfaces.

Does APX803L-46SA-7 meet AEC-Q200 for automotive use?

No - APX803L-46SA-7 is not AEC-Q200 qualified. Diodes offers automotive-grade variants (e.g., APX803L-46SA-7Q) with PPAP capability and IATF 16949 manufacturing, but this standard part is rated for industrial temperature range (–40°C to +85°C) and intended for commercial/industrial applications only.