Diodes Incorporated APX810S05-40SA-7

Overview

APX810S05-40SA-7 from Diodes Incorporated is a micro-power voltage detector IC designed for supervisory reset generation in microprocessor and digital systems. It provides active-high push-pull RESET output with 4.00 V threshold (±0.06 V), 50 ms typical reset timeout, 7 µA supply current, and guaranteed operation down to V_CC = 1.0 V - used in battery-powered controllers and embedded systems requiring reliable power-on reset.

For engineers reviewing the APX810S05-40SA-7 datasheet, APX810S05-40SA-7 pinout, APX810S05-40SA-7 application, or APX810S05-40SA-7 equivalent, key selection criteria include reset threshold accuracy, temperature coefficient (30 ppm/°C), low ICC stability over -40°C to +125°C, and SOT23-3 package compatibility with space-constrained PCB layouts.

Technical Context

This device implements a precision bandgap-based voltage comparator with hysteresis-free threshold detection and internal timing circuitry to generate a fixed-duration active-high reset pulse. The comparator ignores fast transients on V_CC, and the push-pull output drives logic-level loads without external pull-up resistors.

It operates across full industrial temperature range (-40°C to +125°C) with specified reset threshold drift (±0.03 V over temperature) and maintains valid reset assertion until V_CC ≥ 1.0 V - enabling robust brown-out detection in low-voltage portable systems.

Key Specifications

Pinout & Package

SOT23-3 (SA) package: ultra-compact 2.9 mm × 1.3 mm surface-mount outline with 0.95 mm pitch, optimized for high-density PCBs and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G33DBVR, APX810S05-40SA-7 delivers precise 4.0 V detection with 50 ms timeout and zero-external-component push-pull drive - optimizing for compact, low-power, fixed-threshold applications where timing determinism and BOM reduction are critical.

Availability

APX810S05-40SA-7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial control modules, medical handheld devices, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for APX810S05-40SA-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, computing, and consumer markets.

The APX809S/810S series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained applications requiring accurate, low-power reset generation without external components.

FAQ

What is the exact reset threshold voltage and its tolerance for APX810S05-40SA-7?

The APX810S05-40SA-7 has a nominal reset threshold of 4.00 V with a guaranteed tolerance of ±0.06 V at +25°C, as specified in the DS39140 Rev. 2–2 datasheet Table 1. This value remains stable across temperature with a maximum drift of ±0.03 V from –40°C to +125°C.

Does APX810S05-40SA-7 require an external pull-up resistor on the RESET pin?

No. APX810S05-40SA-7 features a push-pull output stage, enabling direct connection to CMOS inputs without external biasing. Its active-high RESET pin sources up to 500 µA and sinks up to 3.2 mA, eliminating the need for a pull-up resistor and reducing PCB footprint and BOM cost.

Can APX810S05-40SA-7 operate reliably below 2.0 V supply voltage?

Yes. The device guarantees valid reset assertion and correct logic-state output down to V_CC = 1.0 V, per Recommended Operating Conditions in DS39140. This enables fail-safe operation during deep brown-out events common in battery-powered systems nearing end-of-life.

What is the thermal resistance (θ_JA) of the SOT23-3 (SA) package?

The SOT23-3 (SA) package has a junction-to-ambient thermal resistance (θ_JA) of 232°C/W, as listed in the Absolute Maximum Ratings table of DS39140. This value assumes standard JEDEC 2-layer board conditions and informs thermal design for continuous operation up to +125°C ambient.