Diodes Incorporated AP393SG-13

Overview

AP393SG-13 from Diodes Incorporated is a dual precision voltage comparator IC featuring ±3 mV maximum input offset voltage, 0.4 mA supply current at 5 V, and rail-to-rail input common-mode range including ground-enabling single-supply operation down to 2.0 V. It delivers TTL/CMOS-compatible open-collector outputs, supports ±1.0 V to ±18 V dual supplies or 2.0–36 V single supply, and is used in zero-crossing detectors, time-delay generators, and battery-powered limit comparators.

For engineers reviewing the AP393SG-13 datasheet, AP393SG-13 pinout, AP393SG-13 application, or AP393SG-13 equivalent, key selection considerations include input offset voltage drift over temperature, ground-sensing capability on single supply, output sink current (6–16 mA), and compatibility with legacy logic families without level-shifting.

Technical Context

The AP393 employs a PNP-input differential pair architecture enabling input common-mode voltage down to ground-even under single-supply operation-and differential input voltage tolerance up to 36 V independent of supply rails. Its uncommitted NPN output transistors support wired-OR configurations and flexible pull-up voltage selection across the full 2.0–36 V range.

Internal biasing ensures supply current remains stable (0.4–1.0 mA) from 5 V to 36 V, while low input bias current (25 nA typ.) and offset current (±5 nA) minimize errors in high-impedance reference or sensor interfaces. The device operates within 0°C to +70°C junction temperature and is not recommended for new designs per manufacturer notice.

Key Specifications

Pinout & Package

SOP-8L surface-mount package (4.9 mm × 3.9 mm × 1.5 mm), RoHS-compliant, green molding compound, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual precision comparator applications.

Compared with LM393DR and TLV3702IDR, AP393SG-13 uniquely balances wide supply range (2–36 V), ground-sensing capability, and moderate precision (±3 mV) - making it optimal for industrial analog front-ends requiring robustness and single-supply simplicity without ultra-low-power constraints.

Availability

AP393SG-13 is available at Aetrix Electronics and suitable for zero-crossing detection, time-delay generation, and battery-powered threshold alarm applications requiring stable component supply and long-term industrial availability.

Supply support for AP393SG-13 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.

The AP393 belongs to Diodes' precision analog comparator product line, designed for cost-sensitive industrial and legacy-system applications requiring wide supply range, ground-referenced inputs, and TTL/CMOS interoperability.

FAQ

Is AP393SG-13 suitable for new designs?

No - Diodes Incorporated explicitly marks AP393 as "NOT RECOMMENDED FOR NEW DESIGN" in its official datasheet (DS31006 Rev. 9-3). It remains available for legacy system maintenance and existing production, but engineers should evaluate modern alternatives like TLV3702 or MAX9021 for new projects requiring extended temperature range, lower power, or enhanced ESD robustness.

Can AP393SG-13 operate from a 3.3 V supply?

Yes - the AP393 supports single-supply operation from 2.0 V to 36 V, including 3.3 V. At 3.3 V, output saturation voltage remains ≤400 mV at 4 mA sink current, ensuring sufficient noise margin for 3.3 V CMOS logic. Input common-mode range extends from 0 V to ~1.8 V, accommodating most 3.3 V sensor outputs.

What is the purpose of the GND pin (Pin 4) in SOP-8L package?

Pin 4 is the sole analog ground reference for both comparators and internal bias circuitry. It must be connected to the system's low-impedance analog ground plane - not digital ground - to maintain specified offset voltage, PSRR, and noise immunity. Floating or improperly decoupled GND causes increased offset drift and erratic switching behavior.

How does AP393SG-13 handle input voltages exceeding V+?

The AP393 tolerates differential input voltages up to ±36 V regardless of V+ magnitude, and individual inputs may exceed V+ if the other stays within common-mode range. However, inputs must not fall below −0.3 V (or 0.3 V below negative supply); clamping diodes or external protection are recommended for sustained overvoltage conditions.