Diodes Incorporated APX803L-34W5-7

Overview

APX803L-34W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, monitoring VCC supply levels in battery-powered and embedded digital systems. It features a fixed 3.4V detection threshold (±1.5% accuracy), 1µA typical supply current, open-drain active-low RESET output, and 450ms built-in recovery delay. Used in portable instrumentation and low-power IoT edge nodes where supply integrity must trigger system reset without burdening power budget.

For engineers reviewing the APX803L-34W5-7 datasheet, APX803L-34W5-7 pinout, APX803L-34W5-7 application, or APX803L-34W5-7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options - all grounded in Diodes Incorporated's DS38171 Rev. 3–2 specification.

Technical Context

The APX803L-34W5-7 implements a precision bandgap-based voltage reference with hysteresis (0.01×VTH) to prevent oscillation during threshold crossing. Its internal comparator drives an open-drain NMOS output stage capable of sinking ≥3.5mA at 0.4V drop, enabling direct interface with µP reset inputs requiring active-low assertion.

It operates across –40°C to +85°C ambient, supports VCC from 0.9V to 5.5V, and guarantees reset assertion within 20µs of VCC falling below 3.4V. The 450ms timeout (APX803L40 variant) is factory-trimmed and stable over temperature (±10% variation from –40°C to +125°C per datasheet Figure 5).

Key Specifications

Pinout & Package

SOT25 (5-pin) package with NC pins; compact 2.9mm × 2.8mm footprint and 1.45mm height suitable for space-constrained PCB layouts in portable equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L-34W5-7, the SA variant trades package robustness for size reduction, while the TLV803EB34DBZR offers lower current at the cost of reduced reset timeout - making the W5 version optimal for applications needing both mechanical reliability and guaranteed 450ms release timing.

Availability

APX803L-34W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart home gateways, and asset tracking beacons requiring stable component supply across long-lifecycle deployments.

Supply support for APX803L-34W5-7 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 targets ultra-low-power supervisory functions in battery-operated and energy-sensitive systems, emphasizing precision threshold control, minimal ICC, and seamless integration into µP reset architectures.

FAQ

What is the exact reset timeout for APX803L-34W5-7?

The "40" suffix in APX803L-34W5-7 denotes the 450ms reset timeout variant. Per DS38171 Rev. 3–2 Table 3, APX803L40-XXW5-7 has a typical delay of 450ms (min 292ms, max 608ms) at +25°C, with ±10% variation over –40°C to +125°C. This is factory-trimmed and does not require external timing components.

Can APX803L-34W5-7 monitor a 5V supply?

Yes - its recommended operating range is 0.9V to 5.5V (DS38171 Section 5), and absolute maximum VCC is 6.0V. The 3.4V threshold remains accurate across this range, making it suitable for supervising 5V rails where brown-out must occur above 3.4V to protect downstream logic.

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-high voltage (e.g., VCC or another supply). Typical values range from 10kΩ to 100kΩ; lower values improve noise immunity but increase static current, while higher values reduce current but risk slower rise times.

Does APX803L-34W5-7 support AEC-Q100 qualification?

No - the standard APX803L-34W5-7 is not AEC-Q100 qualified. Diodes Incorporated states that automotive-grade versions require specific change control, PPAP capability, and IATF 16949 manufacturing; these are custom-order parts, not represented by the commercial W5-7 ordering code.