Diodes Incorporated APX810-46SAG-7

Overview

APX810-46SAG-7 from Diodes Incorporated is a 3-pin SOT23 microprocessor supervisory circuit with active-high push-pull RESET output, precision 4.63 V reset threshold (±0.07 V over temperature), 200 ms typical reset timeout, 30 µA supply current, and guaranteed operation down to VCC = 1 V. It monitors 5 V power rails in embedded controllers and portable systems to prevent erroneous code execution during power-up, brownout, or shutdown.

For engineers reviewing the APX810-46SAG-7 datasheet, APX810-46SAG-7 pinout, APX810-46SAG-7 application, or APX810-46SAG-7 equivalent, this device delivers deterministic reset assertion timing, low-power supervision for battery-sensitive designs, and compatibility with standard 5 V µP reset inputs requiring active-high logic polarity.

Technical Context

The APX810-46SAG-7 integrates a precision voltage comparator with internal hysteresis and a monostable timer to generate a clean, glitch-immune reset pulse. Its reset threshold is trimmed to 4.63 V (min 4.54 V, max 4.72 V) across –40°C to +85°C, with <30 ppm/°C tempco ensuring stability under thermal stress.

The push-pull output drives RESET high after VCC exceeds the threshold and sustains it for ≥140 ms (typ. 200 ms, max 280 ms), retriggering fully on any subsequent VCC dip below threshold. Output logic state is guaranteed valid for VCC ≥1 V, with VOH ≥0.8×VCC at 500 µA source and VOL ≤0.4 V at 3.2 mA sink.

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 pad layout optimized for thermal dissipation (θJA = 201°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809TRD2T and TPS3808G33DBVR, the APX810-46SAG-7 uniquely combines 5 V–optimized 4.63 V threshold, active-high push-pull drive, and zero-external-component operation-enabling direct substitution in legacy 5 V µP designs without layout or firmware changes.

Availability

APX810-46SAG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, network edge routers, and automotive infotainment head units requiring stable component supply and long-term production continuity.

Supply support for APX810-46SAG-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 devices 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 functionality without external components.

FAQ

What is the minimum VCC voltage at which APX810-46SAG-7 guarantees valid RESET output?

The APX810-46SAG-7 guarantees correct logic state on the RESET pin for VCC ≥1 V. Below 1 V, the output enters high-impedance state and is no longer actively driven. This ensures deterministic reset behavior during brownout recovery while minimizing current draw in deep undervoltage conditions.

Can APX810-46SAG-7 replace APX809-46SAG-7 without circuit modification?

No. The APX810-46SAG-7 has an active-high RESET output, whereas the APX809-46SAG-7 provides active-low. Direct substitution would invert reset logic and cause system failure unless the host µP accepts active-high reset or external inversion is added.

Is a bypass capacitor required on the VCC pin?

Yes. A 100 nF ceramic capacitor must be placed between VCC and GND, as close as possible to the device pins. This stabilizes the internal reference and prevents false resets due to supply noise or fast transients, per the datasheet's recommended application circuit.

Does APX810-46SAG-7 support operation at 125°C junction temperature?

No. The APX810-46SAG-7 is rated for operation from –40°C to +85°C ambient temperature. Its maximum junction temperature is +105°C, and thermal derating begins above +70°C ambient. For extended temperature applications, consult Diodes' APX810-46SAH variant or alternative high-temp supervisors.