Diodes Incorporated APX810S00-31SA-7

Overview

APX810S00-31SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for µP supervisory functions in 3.08V supply monitoring applications. It provides active-high push-pull RESET output, guarantees valid reset assertion down to VCC = 1.0V, delivers 7µA typical supply current, and maintains ≥240ms reset timeout after VCC recovery - deployed in portable battery-powered controllers and embedded instrumentation.

For engineers reviewing the APX810S00-31SA-7 datasheet, APX810S00-31SA-7 pinout, APX810S00-31SA-7 application, or APX810S00-31SA-7 equivalent, key selection criteria include reset threshold accuracy (3.04–3.12V), temperature coefficient (30ppm/°C), low-VCC operation capability (1.0V min), push-pull drive strength (1.2mA sink), and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

The APX810S00-31SA-7 integrates a precision bandgap reference and comparator to monitor VCC against a fixed 3.08V threshold (typical), with ±0.04V tolerance over temperature. Its internal timing circuit ensures minimum 240ms reset pulse width after VCC exceeds threshold, independent of external components.

Designed for single-supply operation from 1.0V to 5.5V, it features push-pull output stage capable of sourcing ≥500µA at VOH ≥0.8×VCC and sinking ≥1.2mA at VOL ≤0.3V - eliminating need for external pull-up resistors and enabling direct interface with µP reset inputs.

Key Specifications

Pinout & Package

APX810S00-31SA-7 is housed in a RoHS-compliant, halogen-free SOT23-3 (SA) package measuring 2.9mm × 1.3mm × 1.0mm, optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX810S00-31SA-7, the SR variant offers identical supervision functionality but mandates PCB redesign for pin compatibility, while the TPS3808G33DBVR trades higher integration (no pull-up needed) for increased design complexity and reduced drive strength - making APX810S00-31SA-7 optimal for cost-sensitive, space-constrained 3.3V µP reset applications requiring push-pull simplicity.

Availability

APX810S00-31SA-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial control modules, and medical handheld devices requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for APX810S00-31SA-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, low-power solutions for industrial, computing, and consumer markets.

The APX809S/810S series belongs to Diodes' µP supervisory product line, engineered specifically for cost-effective, zero-component voltage monitoring in space- and power-constrained embedded systems.

FAQ

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

The APX810S00-31SA-7 has a guaranteed reset threshold range of 3.04V (min) to 3.12V (max) at +25°C, with a typical value of 3.08V. This is factory-trimmed and specified across –40°C to +125°C ambient, with a maximum temperature coefficient of 30ppm/°C - ensuring predictable trip behavior in 3.3V rail monitoring.

Does APX810S00-31SA-7 require an external pull-up resistor?

No. APX810S00-31SA-7 features a push-pull RESET output that actively drives high (VOH ≥0.8×VCC) and low (VOL ≤0.3V), eliminating the need for an external pull-up resistor. This reduces BOM count, saves PCB area, and avoids timing uncertainty introduced by RC time constants in open-drain alternatives.

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

No. While the device guarantees valid reset assertion down to VCC = 1.0V, its reset threshold is fixed at ~3.08V and is not adjustable. It is intended for monitoring 3.3V supplies - applying it to a 1.8V rail would prevent the RESET output from ever deasserting, causing permanent system reset.

What is the meaning of "00" in the part number APX810S00-31SA-7?

The "00" suffix denotes the reset timeout option: 1.7ms typical delay (not 240ms). However, per Diodes' ordering table and DS39140 Rev. 2–2, the APX810S00-31SA-7 is a non-standard variant - the standard 240ms version is APX810S-31SA-7. The "00" indicates a fast-reset configuration used in specialized applications requiring sub-millisecond response, confirmed by marking code Q8 on SA-package units.