Nexperia USA Inc. 74AHC74D,118

Overview

74AHC74D,118 from Nexperia is a dual positive-edge-triggered D-type flip-flop with asynchronous set (SD) and reset (RD) inputs, complementary Q/Q̅ outputs per section, Schmitt-trigger clock inputs, and CMOS-level input compatibility. It operates from 2.0 V to 5.5 V, delivers ≤9.5 ns propagation delay at 5 V/50 pF, and supports industrial temperature range (−40 °C to +125 °C) in SO14 package. It serves as a synchronous storage element in digital control logic, state machines, and clock-domain synchronization circuits.

For engineers reviewing the 74AHC74D,118 datasheet, 74AHC74D,118 pinout, 74AHC74D,118 application, or 74AHC74D,118 equivalent, this device is selected for high-noise-immunity edge-triggered data latching where low power, rail-to-rail output swing, and guaranteed setup/hold timing (5.0 ns su / 0.5 ns h at 5 V) are required in space-constrained industrial and automotive subsystems.

Technical Context

This device implements two independent D-type flip-flops sharing no internal coupling-each with dedicated D, CP, SD, RD, Q, and Q̅ terminals. Its Schmitt-trigger clock input enables robust operation with slow-rising or noisy clock edges, while asynchronous active-LOW set/reset inputs override clock timing to force known states regardless of CP activity.

The logic adheres strictly to JEDEC Standard No. 7-A and achieves balanced tPLH/tPHL propagation delays. Input voltage thresholds scale with VCC for 74AHC74 (VIH = 0.7×VCC min), ensuring compatibility across 2.0–5.5 V supply rails without level-shifting circuitry.

Key Specifications

Pinout & Package

74AHC74D,118 is supplied in SO14 (SOT108-1) 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 dual D-type flip-flop applications.

Compared with 74AHCT74D,118, the 74AHC74D,118 offers scalable VIH for mixed-voltage systems but lacks native TTL compatibility; versus SN74LVC74APW, it supports wider supply range and higher temperature grade at the cost of slightly higher propagation delay.

Availability

74AHC74D,118 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and digital power supply sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC74D,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, reliable logic, analog, and MOSFET solutions with focus on efficiency, reliability, and sustainability.

The 74AHC series targets high-speed, low-power digital logic applications in industrial, automotive, and consumer systems where robust noise immunity and wide supply flexibility are essential.

FAQ

Can 74AHC74D,118 operate reliably at 2.0 V supply?

Yes. The device is fully specified from 2.0 V to 5.5 V. At 2.0 V, VIH is guaranteed ≥1.5 V and VOL ≤0.55 V at 4 mA load, supporting interoperability with 2.5 V logic families. Propagation delay increases to ≤15.0 ns (CL = 50 pF), maintaining functional correctness in low-power modes.

What is the purpose of the Schmitt-trigger action on the clock input?

The Schmitt-trigger on CP provides hysteresis (~0.5 V at 5 V), allowing reliable triggering even with slow or noisy clock edges (e.g., RC-filtered microcontroller outputs or long PCB traces). This eliminates metastability risk from marginal transitions and removes need for external debouncing circuitry.

How does the asynchronous reset interact with the clock signal?

1RD and 2RD are asynchronous active-LOW inputs with priority over clock and data. When asserted, they force immediate Q = LOW and Q̅ = HIGH, overriding any ongoing clock or data activity. Release from reset does not trigger new state capture-only the next valid CP edge updates outputs based on D input.

Is the SO14 package RoHS-compliant and lead-free?

Yes. The SOT108-1 (SO14) package used for 74AHC74D,118 is lead-free and RoHS-compliant per EU Directive 2011/65/EU. Nexperia confirms full compliance with exemption 7a (Pb in high-melting-temperature type solders) not applicable; all terminations use pure matte tin plating.