Nexperia USA Inc. 74HC74DB,118

Overview

74HC74DB,118 from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q/nQ outputs per section, and Schmitt-trigger clock inputs for robust timing in noisy environments. It operates from 2.0 V to 6.0 V, delivers 14 ns propagation delay at 6.0 V (CL = 50 pF), supports -40 °C to +125 °C, and is housed in a 14-lead SOIC package (SOT108-1). It serves as a fundamental building block in synchronous logic, state machines, and data synchronization circuits.

For engineers reviewing the 74HC74DB,118 datasheet, 74HC74DB,118 pinout, 74HC74DB,118 application, or 74HC74DB,118 equivalent, this device is selected for edge-sensitive storage in digital control systems, clock domain crossing, debounced input latching, and dual-bit register functions where CMOS-level compatibility, low static power (<80 µA at 6.0 V), and guaranteed setup/hold times (13 ns/3 ns at 6.0 V) are required.

Technical Context

The 74HC74DB,118 implements two independent D-type flip-flops sharing no internal coupling-each features dedicated nD, nCP, nSD, nRD, nQ, and nQ terminals. Its LOW-to-HIGH clock transition triggers data capture, while Schmitt-trigger action on nCP enables tolerance to slow-rising clock edges up to 83 ns/V at 6.0 V.

Asynchronous nSD and nRD inputs override clocked behavior with active-LOW assertion, enabling immediate state forcing without clock dependency. Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors, and output drive capability reaches ±25 mA per pin under recommended conditions.

Key Specifications

Pinout & Package

74HC74DB,118 is supplied in a plastic small outline package (SO14) with 14 leads and 3.9 mm body width (SOT108-1), compliant with JEDEC MS-012. Pin 1 is marked by a beveled corner or index notch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual D-type flip-flop applications.

Compared with SN74HC74DR, 74HC74DB,118 delivers 8 ns faster propagation and 20× lower quiescent current; versus 74HCT74DB,118, it provides 1.2 V higher noise immunity at 5 V but requires CMOS-compatible drivers.

Availability

74HC74DB,118 is available at Aetrix Electronics and suitable for industrial automation, embedded control, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC74DB,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 discrete components optimized for efficiency and miniaturization in industrial and consumer applications.

The 74HC74DB,118 belongs to Nexperia's HC-series logic family, engineered for low-power, high-noise-immunity digital interfacing in space-constrained and thermally demanding environments.

FAQ

What is the maximum clock frequency supported by 74HC74DB,118?

The 74HC74DB,118 supports a maximum clock frequency of 24 MHz at VCC = 6.0 V and CL = 50 pF, based on its 14 ns maximum propagation delay (tpd) and 17 ns minimum clock pulse width (tW). At 5 V, fmax rises to 28 MHz; derating applies above 85 °C ambient per datasheet Table 8.

Can 74HC74DB,118 operate reliably at 3.3 V supply?

Yes-74HC74DB,118 is fully specified from 2.0 V to 6.0 V. At 3.3 V, VIH = 2.31 V (70% VCC) and VIL = 0.99 V (30% VCC), providing 1.32 V noise margin. Propagation delay increases to 22 ns typical, and fmax drops to ~15 MHz, remaining well within industrial 3.3 V system requirements.

How does the Schmitt-trigger clock input improve system robustness?

The Schmitt-trigger on nCP provides hysteresis (~0.4 V at 5 V), allowing clean edge detection even with slow-rising clock signals (e.g., from RC networks or long PCB traces). This eliminates multiple triggering from noise or slow transitions, ensuring exactly one state change per intended clock event.

Is there a recommended decoupling strategy for 74HC74DB,118?

A 100 nF X7R ceramic capacitor placed within 1 cm of pins 7 (GND) and 14 (VCC) is mandatory. For boards with multiple HC devices, add a 4.7 µF tantalum or aluminum electrolytic capacitor per 5–10 ICs near the power entry point to suppress low-frequency ripple and transient droop.