Nexperia USA Inc. 74AHCT02D,112

Overview

74AHCT02D,112 from Nexperia is a quad 2-input NOR gate IC in SO14 package, designed for TTL-level logic interfacing with V_CC = 4.5–5.5 V, propagation delay ≤7.0 ns (CL = 15 pF), and operation from –40 °C to +125 °C. It provides discrete logic inversion and summation in digital control paths, commonly used in address decoding, reset signal conditioning, and bus arbitration circuits.

For engineers reviewing the 74AHCT02D,112 datasheet, 74AHCT02D,112 pinout, 74AHCT02D,112 application, or 74AHCT02D,112 equivalent, this page delivers verified pin functions, JEDEC-compliant timing specs, TTL-compatible input thresholds, thermal derating data for SO14, and validated alternatives for logic-level translation and noise-immune gate replacement.

Technical Context

The 74AHCT02D,112 implements four independent 2-input NOR gates using Si-gate CMOS technology with Schmitt-trigger inputs, enabling robust noise rejection on asynchronous control lines. Its TTL-level input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V at V_CC = 4.5–5.5 V) ensure direct compatibility with legacy LSTTL outputs without level-shifting.

Each gate exhibits matched high-to-low and low-to-high propagation delays (t_PLH/t_PHL ≤ 7.0 ns @ CL = 15 pF), and output drive capability of ±8 mA ensures reliable fan-out into standard CMOS/TTL loads. The device operates across industrial and extended temperature ranges without performance degradation beyond specified static/dynamic limits.

Key Specifications

Pinout & Package

74AHCT02D,112 uses the SOT108-1 (SO14) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input NOR gate applications.

Compared with 74AHCT02D,112, the TSSOP variant offers superior density and thermal performance in compact designs, while the TI alternative provides ecosystem alignment and alternate qualification traceability-neither is pin- or spec-identical in thermal derating or leakage, requiring validation in high-reliability thermal or low-power contexts.

Availability

74AHCT02D,112 is available at Aetrix Electronics and suitable for address decoding, reset signal conditioning, bus arbitration logic, and control signal inversion requiring stable component supply across industrial, automotive, and embedded computing applications.

Supply support for 74AHCT02D,112 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, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74AHCT series targets robust, drop-in replacements for legacy TTL logic in mixed-voltage systems, emphasizing interoperability, noise immunity, and extended temperature operation without sacrificing speed or power efficiency.

FAQ

Can 74AHCT02D,112 operate at 3.3 V?

No. The 74AHCT02D,112 is specifically characterized for TTL-level inputs and requires V_CC = 4.5–5.5 V per its recommended operating conditions. At 3.3 V, input thresholds fall outside specification (V_IH min = 2.0 V not guaranteed), and output drive degrades significantly. Use 74AHC02D,112 for 3.3 V operation instead.

What is the purpose of Schmitt-trigger inputs on this NOR gate?

Schmitt-trigger inputs provide hysteresis (typically ~0.3 V) between rising and falling thresholds, preventing multiple transitions on slow or noisy input edges. This eliminates contact bounce artifacts in manual reset lines and rejects EMI on long PCB traces-critical for reliable reset and enable signal handling.

How does the SO14 package's thermal derating affect long-term reliability?

The SO14 package (SOT108-1) derates total power dissipation by 10.1 mW/K above 100 °C ambient. At 125 °C, P_tot drops to ~475 mW. Designers must limit dynamic loading and ensure adequate copper pour or airflow to avoid junction temperatures exceeding 150 °C, which would accelerate parametric drift and reduce MTBF.

Is 74AHCT02D,112 suitable for automotive under-hood applications?

Yes-its –40 °C to +125 °C operating range and AEC-Q100 stress testing compliance (per Nexperia's qualification report for AHCT series) support under-hood use. However, it is not officially AEC-Q100 certified unless explicitly marked "AEC-Q100 qualified" in the ordering code; verify part-specific qualification status before deployment.