Nexperia USA Inc. 74AHC574D,118

Overview

74AHC574D,118 from Nexperia is an 8-bit positive-edge-triggered D-type flip-flop with 3-state non-inverting outputs, designed for bus-oriented data latching in mixed-voltage digital systems. It operates from 2.0 V to 5.5 V, features overvoltage-tolerant inputs (up to 5.5 V), and delivers 4.4 ns typical propagation delay at 5 V with 15 pF load - enabling high-speed register interfacing in industrial control backplanes and FPGA I/O expansion.

For engineers reviewing the 74AHC574D,118 datasheet, 74AHC574D,118 pinout, 74AHC574D,118 application, or 74AHC574D,118 equivalent, this device serves as a voltage-flexible, low-power octal latch with precise setup/hold timing (3.0 ns su / 1.5 ns h at 5 V), TTL-compatible variants (74AHCT574), and robust ESD protection (HBM >2000 V) - critical for noise-immune PCB-level signal integrity and level translation between 3.3 V and 5 V domains.

Technical Context

This IC implements eight independent D-type flip-flops sharing a common clock (CP) and active-low output enable (OE). Each flip-flop captures the logic state of its D-input on the LOW-to-HIGH CP transition, with set-up and hold times strictly defined (3.0 ns / 1.5 ns at VCC = 5 V). OE controls output impedance independently - asserting HIGH forces all Qn outputs into high-impedance without affecting internal latch states.

Input pins tolerate up to 5.5 V regardless of VCC, enabling safe interfacing across supply domains. All inputs include Schmitt-trigger action for enhanced noise immunity, and static characteristics guarantee VIH ≥ 3.85 V and VOL ≤ 0.36 V at IO = 8 mA (VCC = 4.5 V), ensuring reliable CMOS-level signaling in noisy industrial environments.

Key Specifications

Pinout & Package

74AHC574D,118 is supplied in SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, JEDEC MS-013 compliant. Pin 1 is index-marked; pin 10 = GND, pin 20 = VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT574D,118, the 74AHC574D offers superior voltage flexibility (2.0–5.5 V) and higher noise immunity via Schmitt-trigger inputs, while SN74LVC574APWR trades voltage range for lower static power and finer geometry - making the 74AHC574D optimal for robust, mixed-supply industrial latching where 5 V compatibility and ESD resilience are mandatory.

Availability

74AHC574D,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O expansion, automotive body control modules, and automated test equipment requiring stable component supply across extended temperature ranges and mixed-voltage signal chains.

Supply support for 74AHC574D,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 - founded on Philips' semiconductor heritage and focused on efficiency, reliability, and sustainability.

The 74AHC series targets high-speed, low-power digital interfacing in industrial, automotive, and computing applications - emphasizing voltage flexibility, noise immunity, and robustness in harsh operating conditions.

FAQ

What is the maximum clock frequency supported by the 74AHC574D,118?

The 74AHC574D,118 supports up to 180 MHz maximum clock frequency at VCC = 5.0 V with 15 pF load, as specified in Table 7. At 50 pF load, fmax drops to 115 MHz. These values assume proper PCB layout, decoupling, and signal integrity - actual system-level frequency may be limited by board trace delays and fanout.

Can the 74AHC574D,118 operate reliably at 2.5 V supply?

Yes - the 74AHC574D,118 is fully specified from 2.0 V to 5.5 V. At 2.5 V, propagation delay increases to 13.2 ns (typ) with 15 pF load, and VOH/VOL remain within valid logic thresholds (VIH = 1.75 V min, VOL = 0.36 V max at IO = 4 mA), ensuring interoperability with other 2.5 V logic families.

Is the OE pin truly asynchronous, and does it affect internal latch states?

Yes - OE is fully asynchronous and does not affect internal flip-flop states. When OE transitions HIGH, outputs enter high-impedance within 11.5 ns (max) at 5 V; when OE returns LOW, previously latched data appears on Qn within 11.0 ns (max). Internal storage remains unchanged regardless of OE activity.

How does the overvoltage-tolerant input feature work in practice?

Input pins accept voltages up to 5.5 V even when VCC = 2.0 V - achieved via internal clamping diodes and oxide-thickness design. This allows direct connection of 5 V sensors or legacy peripherals to a 2.5 V or 3.3 V system without external level shifters, provided input current stays within ±20 mA absolute maximum ratings.