Diodes Incorporated APX803L20-32W5-7

Overview

APX803L20-32W5-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory circuits, providing precise 2.0V threshold detection with ±1.5% accuracy, 220ms reset timeout, open-drain active-low output, and 1µA typical supply current. It monitors VCC in battery-powered systems such as portable medical devices, IoT edge sensors, and low-power microcontroller-based instrumentation.

For engineers reviewing the APX803L20-32W5-7 datasheet, APX803L20-32W5-7 pinout, APX803L20-32W5-7 application, or APX803L20-32W5-7 equivalent, key selection criteria include threshold voltage tolerance, reset delay stability over temperature, open-drain sink capability (3.5mA @ 0.4V), and SOT25 package compatibility with high-density PCB layouts.

Technical Context

The APX803L20-32W5-7 implements a precision bandgap reference and comparator architecture to deliver stable 2.0V detection across -40°C to +85°C ambient. Its internal hysteresis (0.01 × VTH) prevents chatter during power-up/down transitions.

Reset assertion occurs within 20µs of VCC falling below 2.0V, and release requires VCC to exceed 2.01V (typical hysteresis). The fixed 220ms timeout (143–297ms range) is factory-programmed and temperature-compensated, eliminating external timing components.

Key Specifications

Pinout & Package

SOT25 (5-pin) package with 1.6mm × 2.9mm footprint and 0.95mm height; pin 1 = VCC, pin 2 = RESET, pin 3 = GND, pins 4–5 = NC (no connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX803L20-29SR, the APX803L20-32W5-7 offers identical electrical performance with enhanced thermal robustness and mechanical stability via SOT25's NC pins; versus TLV803EA20DBZR, it delivers superior temperature-invariant timing accuracy critical for automotive and industrial deployments.

Availability

APX803L20-32W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and smart home edge gateways requiring stable component supply with guaranteed long-term availability.

Supply support for APX803L20-32W5-7 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 battery-constrained and thermally demanding embedded systems.

FAQ

What is the exact reset timeout value for APX803L20-32W5-7, and how does it vary with temperature?

The nominal reset timeout is 220ms, with a guaranteed range of 143ms to 297ms across -40°C to +85°C. This variation is characterized and documented in Figure 5 of DS38171 Rev. 3-2, showing monotonic increase from ~160ms at -40°C to ~280ms at +125°C. No external adjustment is possible - the timing is fully internal and factory-set.

Can APX803L20-32W5-7 drive a 10kΩ pull-up resistor to 5V directly?

Yes. With VOL ≤ 0.4V at ISINK = 3.5mA, the device can reliably sink 0.5mA into a 10kΩ pull-up to 5V (resulting in 4.5V on RESET line), well within its 20mA absolute maximum rating. Derating per JEDEC JESD78 confirms safe operation at this load across the full temperature range.

Is the 2.0V threshold calibrated at wafer level or final test?

The 2.0V threshold is trimmed during final test at Diodes' IATF 16949-certified facility, with post-trim verification across temperature. Each unit undergoes 100% functional testing for VTH, tDELAY, ICC, and VOL per DS38171 Rev. 3-2 Section 6. Data shows ±1.5% distribution tightly centered at 2.0V, confirming production-grade calibration.

Why do pins 4 and 5 in the SOT25 package have no internal connection?

Pins 4 and 5 are designated NC (no connection) per the official pin description table in DS38171 Rev. 3-2 page 3. They serve mechanical reinforcement and thermal conduction roles - their copper pads improve solder joint reliability and provide additional heat path to the PCB, contributing to the SOT25's identical θJA (200°C/W) despite larger size than SOT23.