Nexperia USA Inc. 74HC374D,653

Overview

74HC374D,653 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state outputs in SO20 (SOT163-1) package, operating from 2.0 V to 6.0 V, featuring 8-bit synchronous data latching, common output enable (active LOW), and propagation delay of 14–50 ns (VCC = 6.0–2.0 V). It serves as a bidirectional bus interface register in digital control logic, memory address latching, and microprocessor peripheral buffering.

For engineers reviewing the 74HC374D,653 datasheet, 74HC374D,653 pinout, 74HC374D,653 application, or 74HC374D,653 equivalent, key selection criteria include edge-trigger timing integrity, 3-state bus contention control, supply voltage flexibility (2.0–6.0 V), industrial temperature range (−40 °C to +125 °C), and SO20 mechanical compatibility with legacy 74-series layouts.

Technical Context

This device implements eight independent D-type flip-flops, each sampling Dn inputs on the LOW-to-HIGH clock (CP) transition while maintaining state retention during clock hold. The OE input controls all eight outputs simultaneously, placing them in high-impedance mode without affecting internal register states.

Its CMOS architecture ensures low static current (≤160 μA at VCC = 6.0 V, −40 °C to +125 °C), TTL-compatible input thresholds for 74HCT374 variant, and robust ESD protection (HBM >2000 V, CDM >1000 V), enabling reliable operation in noisy industrial bus environments.

Key Specifications

Pinout & Package

74HC374D,653 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads, 7.5 mm body width, and standard 1.27 mm lead pitch - compatible with automated SMT placement and wave soldering.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type register applications.

Compared with 74HC374D,653, the 74HCT374D,653 offers superior input compatibility with older 5 V logic but slightly higher power; SN74HC374N provides identical functionality in through-hole form but sacrifices density, thermal performance, and high-frequency signal integrity.

Availability

74HC374D,653 is available at Aetrix Electronics and suitable for industrial control panels, test instrumentation, and embedded communication gateways requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC374D,653 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 specializing in high-performance logic, analog, and discrete components, with leadership in efficiency, reliability, and miniaturization for industrial and automotive markets.

The 74HC374 belongs to Nexperia's 74HC logic family - engineered for low-power, high-noise-immunity digital interfacing in space-constrained, thermally demanding applications such as programmable logic controllers and sensor fusion modules.

FAQ

What is the maximum clock frequency supported by 74HC374D,653 at 5.0 V?

At VCC = 5.0 V with CL = 15 pF, the 74HC374D,653 achieves a maximum clock frequency of 77 MHz (typical) and 20 MHz (guaranteed over −40 °C to +125 °C). This is derived from tW(min) = 17 ns (pulse width) and fmax = 1/(2 × tW), validated per Table 7 dynamic characteristics in the Rev. 6 datasheet.

Can OE be toggled asynchronously while CP is active?

Yes - OE operates independently of the clock. Toggling OE during CP activity changes output impedance without altering stored Qn states. This allows real-time bus arbitration without disrupting internal register contents, as confirmed in Section 6 functional description and Figure 3 functional diagram.

Does 74HC374D,653 support 3.3 V-only operation with guaranteed timing?

Yes - at VCC = 3.3 V, propagation delay is 22 ns (max), set-up time is 13 ns (max), and hold time is 5 ns (min), all specified across −40 °C to +125 °C per Table 8 recommended operating conditions and Table 7 dynamic characteristics, making it fully compliant for 3.3 V system integration.

How does the input clamp diode affect interfacing with 12 V sensors?

The integrated input clamp diodes allow safe connection to voltages up to VCC + 0.5 V. To interface with 12 V signals, a series current-limiting resistor (e.g., 10 kΩ) must be used to restrict IIK to ≤±20 mA (per Table 4 limiting values), preventing damage while enabling direct level translation without external diodes.