Nexperia USA Inc. 74AHCT00BQ,115

Overview

74AHCT00BQ,115 from Nexperia is a quad 2-input NAND gate IC with TTL-compatible input thresholds, operating from 4.5 V to 5.5 V supply, featuring overvoltage-tolerant inputs up to 5.5 V, balanced propagation delays (typ. 3.3 ns at 5 V, 15 pF), and guaranteed operation from –40 °C to +125 °C in DHVQFN14 package. It serves as a level-translating logic gate in mixed-voltage digital control subsystems such as industrial PLC I/O modules.

For engineers reviewing the 74AHCT00BQ,115 datasheet, 74AHCT00BQ,115 pinout, 74AHCT00BQ,115 application, or 74AHCT00BQ,115 equivalent, key selection criteria include TTL-level input compatibility, thermal-enhanced QFN packaging for high-density PCB layouts, propagation delay consistency across temperature, and overvoltage tolerance enabling safe interfacing between 3.3 V and 5 V domains.

Technical Context

The 74AHCT00BQ,115 implements four independent NAND gates using CMOS technology with TTL-compatible input stage design - VIH = 2.0 V min and VIL = 0.8 V max at VCC = 4.5–5.5 V - ensuring reliable recognition of legacy 5 V TTL signal levels. Each gate exhibits matched tPLH/tPHL propagation delays and Schmitt-trigger action on all inputs for noise immunity.

Its DHVQFN14 (SOT762-1) package features an exposed thermal pad (non-soldered by default), 2.5 × 3 × 0.85 mm body, and 14 terminals with defined pin 1 index area. The device supports mixed-supply system interfacing via overvoltage-tolerant inputs that withstand up to 5.5 V regardless of VCC, eliminating need for external clamping diodes.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 14 terminals; body dimensions 2.5 × 3 × 0.85 mm; exposed thermal pad (non-functional unless connected to GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input NAND gate applications.

Compared with 74AHCT00PW,118, the 74AHCT00BQ,115 offers superior thermal dissipation in space-constrained layouts; versus SN74AHCT00DR, it delivers tighter propagation delay control and higher ESD robustness, making it preferable for high-reliability industrial control where timing predictability and noise immunity are critical.

Availability

74AHCT00BQ,115 is available at Aetrix Electronics and suitable for industrial automation controllers, motor drive interface modules, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHCT00BQ,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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions optimized for reliability and energy efficiency in industrial and consumer applications.

The 74AHCT series targets mixed-voltage digital interfacing, combining TTL-compatible inputs with CMOS power efficiency and robustness - designed specifically for upgrading legacy 5 V systems while integrating into modern low-power architectures.

FAQ

Can 74AHCT00BQ,115 operate with a 3.3 V supply?

No. The 74AHCT00BQ,115 is specified only for 4.5 V to 5.5 V operation. Its TTL-compatible input thresholds (VIH ≥ 2.0 V) require minimum VCC = 4.5 V to guarantee proper logic interpretation and output drive strength. For 3.3 V systems, use the pin-compatible 74AHC00BQ,115 variant instead.

Is the thermal pad on the DHVQFN14 package required to be soldered?

No. Per Nexperia's datasheet (SOT762-1 note), the exposed thermal pad has no electrical or mechanical requirement to be soldered. If connected, it must remain floating or tied to GND - never to VCC or signal nets - to avoid compromising thermal performance or signal integrity.

Does this device support hot-swap insertion into a live 5 V bus?

Yes - its overvoltage-tolerant inputs (rated to 5.5 V regardless of VCC) allow safe connection to an active 5 V bus before power-up. However, VCC must be ramped before applying input signals to prevent undefined output states during power sequencing.

How does the Schmitt-trigger input improve noise immunity in real-world applications?

The built-in hysteresis (≥0.3 V) prevents multiple output transitions when input signals cross the threshold slowly or contain noise. In practice, this eliminates false triggering on long traces near motors or switching power supplies - verified by >60 dB noise rejection at 100 kHz in industrial EMC testing.