Nexperia USA Inc. 74AHC574PW,118

Overview

74AHC574PW,118 from Nexperia is an octal 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 reliable high-speed register interfacing in industrial control backplanes.

For engineers reviewing the 74AHC574PW,118 datasheet, 74AHC574PW,118 pinout, 74AHC574PW,118 application, or 74AHC574PW,118 equivalent, this device serves as a voltage-flexible, low-power 8-bit latch with precise setup/hold timing (3.0 ns / 1.5 ns at 5 V), critical for synchronous data capture in FPGA I/O expansion, microcontroller peripheral buffering, and legacy bus isolation.

Technical Context

This device 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 transition of CP, with set-up and hold times strictly enforced to ensure deterministic sampling. The 3-state outputs are fully decoupled from flip-flop state during OE assertion, preserving internal register contents while isolating the bus.

Input Schmitt-trigger action provides high noise immunity, and CMOS-level input thresholds (VIH = 3.85 V min at VCC = 5.5 V) guarantee compatibility with standard 5 V logic families. Overvoltage tolerance allows safe interfacing with 5 V signals even when powered at 3.3 V, supporting level translation without external components.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1), 20-lead, body width 4.4 mm, 0.65 mm pitch - optimized for high-density PCB layouts with improved thermal performance over SO20.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT574PW,118, the 74AHC574PW,118 offers broader voltage flexibility and overvoltage safety but lacks TTL input compatibility; versus SN74LVC574APW, it trades lower static current for higher voltage resilience and wider operating range.

Availability

74AHC574PW,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O expansion, and microcontroller peripheral multiplexing requiring stable component supply across extended temperature ranges and mixed-voltage environments.

Supply support for 74AHC574PW,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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial and automotive markets.

The 74AHC series targets general-purpose, high-speed CMOS logic applications demanding wide supply range, low power, and robust noise immunity - especially in mixed-voltage digital interface and data-path conditioning.

FAQ

What is the maximum clock frequency supported by the 74AHC574PW,118?

The 74AHC574PW,118 supports up to 110 MHz maximum clock frequency at VCC = 4.5–5.5 V with 50 pF load, as specified in Table 7 (fmax = 75–115 MHz depending on temperature and load). This is determined by propagation delay (tpd ≤ 13.5 ns) and pulse width requirements (tW ≥ 5.0 ns), making it suitable for high-speed synchronous bus interfaces.

Can the 74AHC574PW,118 safely interface 5 V signals while powered at 3.3 V?

Yes. All inputs (D0–D7, CP, OE) are overvoltage tolerant up to 5.5 V regardless of VCC level, per Section 2 and Table 4. This allows direct connection of 5 V signals to the device when VCC = 3.3 V, eliminating external level-shifting components in mixed-voltage systems.

How does the 3-state output behavior interact with the internal flip-flop state?

Asserting OE HIGH places Q0–Q7 in high-impedance mode without altering the stored state of any flip-flop. The internal registers retain their last-latched values, and outputs resume immediately upon OE returning LOW - ensuring glitch-free bus re-engagement and data coherency during hot-swap or multi-master arbitration.

Is the 74AHC574PW,118 suitable for automotive applications?

No. The 74AHC574PW,118 is qualified for industrial temperature range (−40 °C to +125 °C) but is not AEC-Q100 qualified. Nexperia explicitly states in Section 14 that non-automotive qualified products are unsuitable for safety-critical or life-support systems, including automotive ECUs, ADAS, or infotainment head units requiring automotive-grade reliability and qualification.