Nexperia USA Inc. 74AHCT86D,118

Overview

74AHCT86D,118 from Nexperia is a quad 2-input EXCLUSIVE-OR gate in SO14 package, designed for digital logic translation and signal-level arbitration in mixed-voltage systems. It operates from 4.5 V to 5.5 V, features TTL-compatible inputs, 3.4 ns typical propagation delay at 5 V/15 pF, and overvoltage-tolerant inputs up to 5.5 V. It is used in bus arbitration, parity generation, and control-state comparison circuits.

For engineers reviewing the 74AHCT86D,118 datasheet, 74AHCT86D,118 pinout, 74AHCT86D,118 application, or 74AHCT86D,118 equivalent, key selection criteria include input voltage compatibility (TTL), propagation delay consistency across temperature (−40 °C to +125 °C), output drive strength (±8 mA), Schmitt-trigger input hysteresis, and SO14 package thermal derating behavior above 100 °C.

Technical Context

This device implements four independent XOR gates with identical truth table behavior: output HIGH only when inputs differ. Each gate has TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) and CMOS-compatible output swing (VOH ≥ 3.94 V, VOL ≤ 0.36 V at IO = ±8 mA).

It integrates Schmitt-trigger action on all inputs for noise immunity, supports overvoltage-tolerant operation up to 5.5 V regardless of VCC, and maintains balanced tPLH/tPHL propagation delays - critical for synchronous logic integrity in clock-domain crossing or data validation paths.

Key Specifications

Pinout & Package

74AHCT86D,118 uses the SOT108-1 (SO14) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, and gull-wing surface-mount terminals. Thermal resistance θJA = 100 K/W (JEDEC Std 2S2P).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar XOR gate applications.

Compared with 74AHCT86D,118, SN74LVC86APWR offers broader voltage flexibility but sacrifices TTL interoperability, while 74HC86D,653 provides pinout compatibility at lower cost but adds ~3.4 ns delay and cannot accept raw TTL signals - making 74AHCT86D,118 the optimal choice for mixed-signal 5 V systems requiring deterministic timing and legacy interface support.

Availability

74AHCT86D,118 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHCT86D,118 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

Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.

The 74AHCT series targets industrial and automotive logic interfacing, emphasizing TTL compatibility, wide temperature operation, and robust ESD/latch-up performance for mission-critical signal conditioning.

FAQ

Can 74AHCT86D,118 operate with a 3.3 V supply?

No. The 74AHCT86D,118 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are guaranteed only within this range. Using 3.3 V violates recommended conditions and may cause unreliable input recognition or increased static current. For 3.3 V systems, consider the 74LVC86 or 74AHC86 variants instead.

What is the maximum capacitive load this device can drive reliably?

The 74AHCT86D,118 is characterized up to 50 pF load capacitance, with propagation delay increasing from 3.4 ns (15 pF) to 4.9 ns (50 pF) at VCC = 5 V. Driving >50 pF risks exceeding output transition time limits, increasing dynamic power dissipation (CPD = 12 pF), and potentially violating setup/hold timing in synchronous designs. For heavier loads, add a buffer stage or use a higher-drive logic family.

Does the SO14 package require thermal pad soldering?

No. The SOT108-1 (SO14) package used by 74AHCT86D,118 has no exposed thermal pad. Thermal management relies on copper pour connected to pins 7 (GND) and 14 (VCC). For sustained 500 mW dissipation, maintain ≥250 mm² of 2-oz copper on both top and bottom layers tied to these pins using ≥4 thermal vias each.

How does Schmitt-trigger action improve noise immunity in this device?

Schmitt-trigger inputs provide hysteresis - typically 0.3–0.5 V - meaning the threshold for detecting a rising edge (e.g., 1.5 V) differs from that for a falling edge (e.g., 1.0 V). This prevents multiple toggles when input signals cross the threshold slowly or with superimposed noise, ensuring single, clean transitions essential for reliable state detection in control logic and encoder interfaces.