Diodes Incorporated APX810S00-31SR-7

Overview

APX810S00-31SR-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 3.3V digital systems. It provides active-high push-pull RESET output with 3.08V threshold (±0.04V), 240ms minimum reset timeout, 7µA typical supply current, and guaranteed operation down to VCC = 1.0V - used in battery-powered controllers and embedded instrumentation.

For engineers reviewing the APX810S00-31SR-7 datasheet, APX810S00-31SR-7 pinout, APX810S00-31SR-7 application, or APX810S00-31SR-7 equivalent, key selection criteria include reset threshold accuracy at temperature, low ICC across -40°C to +125°C, push-pull drive strength (VOH ≥ 0.8×VCC at 500µA), and SOT23-SR package compatibility with high-density PCB layouts.

Technical Context

The APX810S00-31SR-7 integrates a precision bandgap reference, comparator, and power-on reset timer in a single die. Its reset assertion logic activates when VCC falls below 3.08V and holds RESET high for ≥240ms after VCC rises above threshold - independent of external RC timing components.

Designed for immunity to fast VCC transients, it guarantees correct logic state at VCC ≥ 1.0V and supports operation across -40°C to +125°C ambient. The push-pull output eliminates need for external pull-up resistors and delivers VOH ≥ 0.8VCC (ISOURCE = 500µA) and VOL ≤ 0.4V (ISINK = 3.2mA).

Key Specifications

Pinout & Package

APX810S00-31SR-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SR) package with 1.3mm × 2.9mm footprint and 0.95mm height - optimized for automated placement and reflow soldering in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G33DBVR, APX810S00-31SR-7 offers optimal balance of 3.08V precision, push-pull simplicity, 7µA ICC, and minimal 3-pin SOT23-SR footprint - making it ideal for new 3.3V µP supervision where board area and battery longevity are critical.

Availability

APX810S00-31SR-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, smart energy meters, and IoT edge sensors requiring stable component supply and long-term manufacturability.

Supply support for APX810S00-31SR-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial and consumer markets.

This device belongs to Diodes' APX8xxS voltage supervisor family - engineered for low-cost, high-accuracy power monitoring in space- and power-constrained µP systems without external timing components.

FAQ

What is the exact reset threshold voltage for APX810S00-31SR-7?

The APX810S00-31SR-7 has a nominal reset threshold of 3.08V, with guaranteed min/max values of 3.04V and 3.12V at +25°C. This value is specified in the Electrical Characteristics table of DS39140 Rev. 2–2, and remains stable within ±0.04V across temperature due to its 30ppm/°C coefficient.

Does APX810S00-31SR-7 require an external capacitor for reset timing?

No - the 240ms minimum reset timeout is fully integrated and does not rely on external capacitors. The device uses an internal oscillator and counter to guarantee tDELAY ≥ 240ms after VCC rises above threshold, eliminating timing component variation and PCB area usage.

Can APX810S00-31SR-7 operate with a 1.8V supply?

Yes - it functions reliably down to VCC = 1.0V, so 1.8V is well within its 1.0V–5.5V operating range. However, the 3.08V threshold means it will assert RESET continuously at 1.8V; it is intended for monitoring 3.3V supplies, not powering from 1.8V rails.

Is the SOT23-SR package identical to SOT23-SA in mechanical dimensions?

Yes - both SOT23-SR and SOT23-SA share identical JEDEC MO-178AA outline: 1.3mm × 2.9mm body, 0.95mm max height, and 0.95mm lead pitch. The suffix denotes tape-and-reel orientation (SR = reversed tape direction vs SA), not physical differences.