Diodes Incorporated APX810-29SAG-7

Overview

APX810-29SAG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory circuit with active-high push-pull RESET output, 2.93 V reset threshold (±70 mV over −40°C to +85°C), 200 ms typical reset timeout, 30 µA supply current, and guaranteed reset validity down to VCC = 1 V. It monitors 3.0 V/3.3 V digital power rails in embedded controllers and portable systems.

For engineers reviewing the APX810-29SAG-7 datasheet, APX810-29SAG-7 pinout, APX810-29SAG-7 application, or APX810-29SAG-7 equivalent, key selection criteria include reset threshold accuracy (±2.4% at 2.93 V), temperature-stable timeout (140–280 ms), low-voltage operation margin (1 V min), push-pull drive capability (800 µA source), and RoHS-compliant green SOT23 packaging.

Technical Context

The APX810-29SAG-7 implements a precision voltage comparator with internal reference and monostable delay circuit to generate a clean, glitch-immune active-high reset pulse. Its reset assertion is triggered solely by VCC falling below 2.93 V, and the output remains high for ≥240 ms after VCC rises above threshold.

Designed for brownout immunity, it ignores fast transients on VCC and maintains valid logic states across −40°C to +85°C ambient. The push-pull output eliminates external pull-up resistors and ensures defined logic levels without external biasing.

Key Specifications

Pinout & Package

SOT23-3 (SA package) surface-mount package with 2.4 mm × 1.3 mm footprint, 0.95 mm height, and JEDEC-standard thermal pad layout. 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 APX810-29SAG-7 uniquely combines 2.93 V precision threshold, active-high push-pull output, and validated 3.0 V system compatibility-making it optimal for brownout-sensitive 3.0 V embedded controllers where logic polarity and BOM simplification are design priorities.

Availability

APX810-29SAG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and smart energy meters requiring stable component supply with guaranteed long-term availability and consistent parametric performance.

Supply support for APX810-29SAG-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 series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained embedded systems requiring precise, low-power reset supervision of 2.5 V–5 V rails without external components.

FAQ

What is the minimum VCC voltage at which APX810-29SAG-7 guarantees valid RESET logic levels?

The APX810-29SAG-7 guarantees correct RESET logic state (high or low) for VCC down to 1.0 V. Below 1.0 V, the output enters high-impedance state; however, most microprocessors are nonfunctional below this voltage, so system-level behavior remains deterministic. No external pull-down is required unless RESET must remain asserted to 0 V.

Does APX810-29SAG-7 require external capacitors or resistors for basic reset functionality?

No. The APX810-29SAG-7 is a fully self-contained reset supervisor requiring no external components for core operation. Its internal voltage reference, comparator, and monostable timer eliminate the need for external RC networks, pull-up resistors, or trimming elements-reducing BOM count and improving reliability in compact designs.

How does the reset timeout behave during repeated brownout events?

Each time VCC falls below the 2.93 V threshold, the internal timer resets to zero and forces RESET low immediately. The 200 ms timeout period starts anew only after VCC rises above threshold and remains stable. This ensures continuous reset assertion during sustained brownouts and prevents premature release during voltage ripple.

Is APX810-29SAG-7 compatible with 3.0 V nominal systems despite its 2.93 V threshold?

Yes. The 2.93 V threshold provides 2.3% headroom below 3.0 V, aligning with standard 3.0 V supply tolerances (±5%). It triggers reset before the system enters undefined operation while allowing normal operation during minor 3.0 V rail fluctuations-making it purpose-built for 3.0 V microcontroller and FPGA applications.