Diodes Incorporated AP393NG-U

Overview

AP393NG-U from Diodes Incorporated is a dual precision voltage comparator IC with ±3 mV max input offset voltage, 0.4 mA supply current, and rail-to-rail input common-mode range including ground-designed for single-supply operation from 2.0 V to 36 V. It features open-collector outputs compatible with TTL, CMOS, ECL, DTL, and MOS logic, and is packaged in lead-free PDIP-8L.

For engineers reviewing the AP393NG-U datasheet, AP393NG-U pinout, AP393NG-U application, or AP393NG-U equivalent, key selection considerations include its ground-sensing capability on single supply, low power consumption suitable for battery-powered systems, compatibility with legacy and modern logic families, and dual-channel configuration enabling compact analog decision circuitry in industrial control and signal conditioning designs.

Technical Context

The AP393NG-U employs a PNP-input stage enabling input common-mode voltage down to ground under single-supply operation, while maintaining differential input voltage tolerance up to ±36 V. Its output stage uses uncommitted NPN collectors, allowing wired-OR configurations and flexible pull-up voltage selection independent of V+.

Supply current remains constant (0.4 mA typ.) across 2.0–36 V supply range due to bias network design. Input bias current is 25 nA typ., offset current ±5 nA max, and large-signal response time is 300 ns (100 mV step, 5 mV overdrive) for fast edge detection in timing and pulse generation circuits.

Key Specifications

Pinout & Package

AP393NG-U is supplied in PDIP-8L (Plastic Dual In-line Package, 8-lead), RoHS-compliant, lead-free, green molding compound package with 0.3 inch body width and standard through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TL393CP, AP393NG-U delivers superior ground-sensing assurance across temperature, lower offset for precision thresholding, and lower quiescent current-making it optimal for battery-powered, industrial, and safety-critical sensing where input accuracy and supply flexibility are non-negotiable.

Availability

AP393NG-U is available at Aetrix Electronics and suitable for industrial control systems, battery-powered instrumentation, AC line monitoring, and mixed-logic interface circuits requiring stable component supply and long-term manufacturability.

Supply support for AP393NG-U 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, application-optimized components for industrial, computing, and consumer markets.

The AP393 product line targets precision analog decision-making in resource-constrained environments-delivering low-offset, low-power, single-supply comparators for sensor interfaces, power management, and timing circuits where ground-referenced operation is essential.

FAQ

Can AP393NG-U operate from a single 3.3 V supply?

Yes. The AP393NG-U supports single-supply operation from 2.0 V to 36 V. At 3.3 V, it maintains full functionality: input common-mode range includes ground (0 V), typical supply current remains 0.4 mA, and output saturation voltage stays below 400 mV at 4 mA load-ensuring reliable interfacing with 3.3 V logic families.

Does AP393NG-U require external bypass capacitors?

No. The AP393NG-U's bias network is designed for supply-current stability across voltage and temperature, making power supply bypassing unnecessary. Standard PCB layout practices (short traces, ground plane) are sufficient to prevent oscillation; adding hysteresis (>1 mV) further suppresses noise-induced switching during transitions.

What is the maximum sink current per output?

Each output can sink up to 16 mA continuously before exiting saturation. At 4 mA, saturation voltage is 250 mV max; at 16 mA, output voltage rises rapidly due to transistor β limitation and r_SAT (~60 Ω). For sustained 16 mA loads, thermal derating and PCB copper area must be verified per the 780 mW PDIP-8L power dissipation rating.

How should unused comparator channels be terminated?

Unused comparator inputs must be tied to GND (pin 4) to prevent floating nodes that cause erratic output switching and increased supply current. The corresponding output (e.g., OUTPUT 2 if channel 2 is unused) should be left open or pulled up externally-no internal termination is provided, and leaving inputs unconnected risks instability and EMI susceptibility.