Nexperia USA Inc. 74AHCT86BQ,115

Overview

74AHCT86BQ,115 from Nexperia is a quad 2-input EXCLUSIVE-OR gate in DHVQFN14 package, operating from 4.5 V to 5.5 V with TTL-compatible inputs, 3.4 ns typical propagation delay at 5 V/15 pF, and overvoltage-tolerant inputs up to 5.5 V. It serves as a logic-level translator in mixed-voltage digital interfaces such as microcontroller I/O expansion and bus arbitration circuits.

For engineers reviewing the 74AHCT86BQ,115 datasheet, 74AHCT86BQ,115 pinout, 74AHCT86BQ,115 application, or 74AHCT86BQ,115 equivalent, this device supports high-noise-immunity XOR logic in space-constrained industrial control modules, low-power sensor interface subsystems, and legacy-TTL-to-3.3V-CMOS bridging applications where balanced timing and input tolerance are critical.

Technical Context

This device implements four independent CMOS-based XOR gates with Schmitt-trigger inputs for noise suppression and TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V). Each gate exhibits matched tPLH/tPHL propagation delays and operates across -40 °C to +125 °C.

Its overvoltage-tolerant inputs (up to 5.5 V) enable safe interfacing between 5 V legacy systems and lower-voltage logic domains without external level-shifting components. The DHVQFN14 package provides thermal enhancement via an exposed die pad while maintaining 0.5 mm pitch and 2.5 × 3 mm footprint.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3 × 0.85 mm body, no leads, 14 terminals, thermally enhanced with exposed die pad (non-soldered or GND-connected per design).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC86APW and 74HC86BQ, the 74AHCT86BQ,115 uniquely combines TTL input compatibility, overvoltage tolerance, and sub-4 ns speed in a thermally optimized QFN-making it optimal for retrofitting legacy 5 V logic into compact, high-reliability embedded controllers.

Availability

74AHCT86BQ,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller I/O expansion, legacy bus arbitration, and hardware parity generation requiring stable component supply across extended temperature ranges.

Supply support for 74AHCT86BQ,115 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74AHCT series delivers TTL-compatible logic devices optimized for interoperability between legacy 5 V systems and modern mixed-voltage designs, emphasizing robustness, timing precision, and thermal efficiency.

FAQ

Is the exposed thermal pad on the DHVQFN14 package electrically connected?

No-the exposed pad on the 74AHCT86BQ,115 (SOT762-1) has no internal electrical connection. Per Nexperia's datasheet, it may be left unsoldered, floated, or connected to GND solely for thermal conduction. Soldering it to GND improves thermal resistance by ~15 °C/W but introduces no electrical function.

Can 74AHCT86BQ,115 operate reliably at 3.3 V supply?

No-it is not specified for 3.3 V operation. The 74AHCT86 variant requires VCC ≥ 4.5 V to meet TTL input thresholds (VIH ≥ 2.0 V) and guaranteed output swing. For 3.3 V systems, use the pin-compatible 74LVC86 or 74AHC86 variants instead.

What is the maximum capacitive load this device can drive while maintaining timing specs?

The datasheet specifies timing parameters up to 50 pF load capacitance. At CL = 50 pF and VCC = 5 V, tpd remains ≤ 8.8 ns (max) with 1.0 ns minimum pulse width. Driving >50 pF increases delay nonlinearly and may violate setup/hold margins in synchronous designs.

Does this device support hot insertion or live swapping in backplane applications?

No-74AHCT86BQ,115 lacks Ioff (power-off protection) or IOZ (3-state with power-down) features. Applying input signals while VCC = 0 V risks latch-up or excessive ICC due to internal parasitic paths. Always sequence VCC before enabling inputs in hot-swap scenarios.