Diodes Incorporated APX810-46SRG-7

Overview

APX810-46SRG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory circuit with active-high push-pull RESET output, 4.63 V reset threshold (±0.07 V over −40°C to +85°C), 200 ms typical reset timeout, and guaranteed operation down to VCC = 1 V. It monitors 5 V digital power rails in embedded controllers and portable systems to prevent erroneous code execution during power-up, brownout, or shutdown.

For engineers reviewing the APX810-46SRG-7 datasheet, APX810-46SRG-7 pinout, APX810-46SRG-7 application, or APX810-46SRG-7 equivalent, key selection criteria include reset threshold accuracy, push-pull drive capability, low 30 µA supply current, SOT23 footprint compatibility, and guaranteed reset validity at VCC ≥ 1 V.

Technical Context

The APX810-46SRG-7 implements a precision voltage comparator with internal reference and monostable delay circuit to generate a clean, glitch-immune active-high RESET signal. Its reset assertion is triggered when VCC falls below 4.54–4.72 V (−40°C to +85°C), and the output remains asserted for 140–280 ms after VCC recovers above threshold.

Designed for direct integration into µP power monitoring paths, it requires no external components, tolerates fast VCC transients, and maintains defined logic states across its full operating range (VCC = 1.1–5.5 V, TA = −40°C to +85°C). The push-pull output drives CMOS inputs without pull-up resistors and sinks/source up to 3.2 mA.

Key Specifications

Pinout & Package

SOT23-3 (SR package) with 2.4 mm × 1.3 mm footprint, 0.95 mm height, and standard 0.95 mm lead pitch. RoHS-compliant, halogen-free "Green" molding compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX809TRD2T and TPS3808G33DBVR, the APX810-46SRG-7 delivers plug-in compatibility for 5 V systems requiring active-high reset, zero external components, and guaranteed 1 V minimum VCC operation-reducing validation effort and bill-of-materials cost.

Availability

APX810-46SRG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for APX810-46SRG-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 APX809/810 product line targets cost-sensitive, space-constrained microprocessor supervision applications where precision threshold, low quiescent current, and minimal external components are critical design requirements.

FAQ

What is the exact reset threshold voltage for APX810-46SRG-7 over temperature?

The APX810-46SRG-7 has a reset threshold of 4.63 V (typical), with guaranteed limits of 4.54 V (min) at −40°C and 4.72 V (max) at +85°C. This 0.18 V window ensures reliable reset initiation across the full industrial temperature range without false triggering near nominal 5 V rails.

Can APX810-46SRG-7 drive a reset pin directly without external components?

Yes. Its push-pull active-high output drives µP reset pins directly-no pull-up resistor or external circuitry is needed. It sources up to 500 µA at 0.8×VCC and sinks up to 3.2 mA, meeting standard CMOS input requirements for most ARM, PIC, and STM32 microcontrollers.

Is APX810-46SRG-7 compatible with 3.3 V systems?

No. Its 4.63 V reset threshold is optimized for 5 V supply monitoring. Using it on a 3.3 V rail would cause continuous reset assertion since VCC never reaches the threshold. For 3.3 V systems, select APX810-31SRG-7 (3.08 V threshold) or APX810-33SRG-7 (3.3 V variant, if available).

Does APX810-46SRG-7 meet RoHS and halogen-free requirements?

Yes. It uses Diodes Incorporated's "Green" SOT23 (SR) package with no bromine, antimony, or lead-complying fully with EU RoHS Directive 2011/65/EU and halogen-free definitions (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb). Marking code "YA" confirms green material compliance per datasheet.