NXP Semiconductors 74AHCT08D,112

Overview

74AHCT08D,112 from Nexperia is a quad 2-input positive AND gate in SO14 package, operating at 4.5–5.5 V supply, with 8 ns typical propagation delay at 5 V, ±8 mA output drive, and TTL-compatible inputs. It performs basic logic conjunction in digital control signal routing for industrial PLC I/O modules.

For engineers reviewing the 74AHCT08D,112 datasheet, 74AHCT08D,112 pinout, 74AHCT08D,112 application, or 74AHCT08D,112 equivalent, key selection criteria include propagation delay matching, input threshold compatibility with legacy TTL systems, output current capability for driving multiple CMOS loads, and SO14 thermal performance in dense PCB layouts.

Technical Context

This device implements four independent AND gates using advanced silicon-gate CMOS technology. Each gate features buffered outputs, symmetrical propagation delays (t_PHL ≈ t_PLH), and guaranteed high- and low-level output voltages across temperature and voltage ranges.

The input structure accepts TTL-level signals (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V) while operating from a 5 V ±10% supply. Output stages are designed for rail-to-rail swing under specified load conditions (C_L = 50 pF).

Key Specifications

Pinout & Package

Package: SO14 (Small Outline, 14-pin, 150 mil width, 1.27 mm pitch, JEDEC MS-012AC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AHCT08DR and 74AHC08D,112, the 74AHCT08D,112 uniquely balances TTL input compatibility with 5 V CMOS output drive-critical for brownfield industrial upgrades where legacy signal sources coexist with modern logic loads.

Availability

74AHCT08D,112 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device control systems requiring stable component supply over extended production lifecycles.

Supply support for 74AHCT08D,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, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer applications.

The 74AHCT series targets industrial and automotive systems needing TTL-compatible logic with robust 5 V operation, low power consumption, and guaranteed timing performance across temperature extremes.

FAQ

Is 74AHCT08D,112 compatible with 3.3 V input signals?

No. Its input thresholds are optimized for TTL levels (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), not 3.3 V CMOS. Driving it with 3.3 V logic may result in marginal or undefined switching behavior. Use level translators or select AHC-family parts for 3.3 V–5 V interfacing.

What is the maximum recommended capacitive load for 74AHCT08D,112 outputs?

The datasheet specifies timing and drive performance up to 50 pF. Exceeding this load increases propagation delay nonlinearly and may cause output ringing or reduced noise margin. For >50 pF loads, add series termination or buffer stages.

Does 74AHCT08D,112 support hot insertion?

No. It lacks hot-swap protection circuitry such as power-up sequencing control or I_ON current limiting. Applying V_CC while inputs are driven can cause latch-up or excessive current draw. Power sequencing must follow manufacturer-recommended order: GND first, then V_CC, then inputs.

Can 74AHCT08D,112 be used in battery-powered applications?

Yes, but only where 5 V supply is stable. Its quiescent current is typically 2 µA at 25°C, making it suitable for low-power standby modes. However, dynamic power scales with frequency and load capacitance-designers must calculate total I_CC based on toggle rate and C_L to assess battery life impact.