Nexperia USA Inc. 74LVC574APW,118

Overview

74LVC574APW,118 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state outputs, 5 V tolerant I/O, and IOFF partial power-down protection. It operates from 1.2 V to 3.6 V supply, supports mixed-voltage interfacing (3.3 V ↔ 5 V), and functions as a data latch/register in bus-hold or level-shifting applications within industrial control and digital logic subsystems.

For engineers reviewing the 74LVC574APW,118 datasheet, 74LVC574APW,118 pinout, 74LVC574APW,118 application, or 74LVC574APW,118 equivalent, key selection criteria include its 3.6 V max VCC, 5.5 V overvoltage-tolerant inputs, -40 °C to +125 °C operating range, 9 ns max propagation delay at 3.3 V, and TSSOP20 package compatibility with high-density PCB layouts.

Technical Context

The device implements eight independent edge-triggered D flip-flops synchronized to the rising edge of CP, with asynchronous 3-state control via active-low OE. Its Schmitt-trigger inputs tolerate slow signal edges, and the IOFF circuit ensures zero backflow current when VCC = 0 V-enabling hot-swap and partial power-down system designs.

Each flip-flop latches Dn on LOW-to-HIGH CP transition under valid setup/hold timing (2.0 ns su / +1.5 ns h at 3.3 V), while OE independently enables/disables all Q outputs without affecting internal register state-allowing concurrent data capture and bus release.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): 4.4 mm body width, 0.65 mm pitch, 20-terminal surface-mount plastic thin shrink small outline package optimized for thermal performance and PCB space efficiency.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC574APWR and 74LVCH16374ADGG, the 74LVC574APW,118 uniquely balances 5 V tolerance, compact TSSOP20 packaging, and industrial temperature rating-making it optimal for cost-sensitive, space-constrained mixed-voltage latching where reliability under partial power-down is mandatory.

Availability

74LVC574APW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller GPIO multiplexing, and memory interface buffering requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVC574APW,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 focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, mobile, and computing markets.

The 74LVC574A belongs to Nexperia's advanced logic portfolio designed specifically for low-power, mixed-voltage digital interfacing-emphasizing robustness, wide supply flexibility, and seamless integration in heterogeneous electronic systems.

FAQ

What is the maximum clock frequency supported by the 74LVC574APW,118?

The device supports up to 150 MHz at VCC = 3.3 V and 120 MHz at VCC = 3.6 V across the full -40 °C to +125 °C range, as validated by fmax testing in the official Nexperia datasheet Rev. 7.1. This assumes proper load capacitance (≤50 pF) and signal integrity; actual system-level frequency depends on board layout and fanout.

Can the 74LVC574APW,118 be used with a 5 V microcontroller driving its inputs while powered from 3.3 V?

Yes. Its inputs are explicitly rated for 5.5 V regardless of VCC, allowing direct connection to 5 V logic outputs without level shifters or clamping diodes. The output voltage swing remains bounded by VCC (0 V to 3.3 V), so external pull-ups are required if 5 V logic levels are needed at Q outputs.

Does the 74LVC574APW,118 support hot-swap or partial power-down operation?

Yes. Its integrated IOFF circuitry disables outputs and limits leakage to ±10 μA when VCC = 0 V, preventing damaging back-current from live 5 V buses into a de-powered device-enabling safe insertion/removal in modular backplane or hot-swap power supply systems.

How does the Schmitt-trigger input benefit system design?

Schmitt-trigger inputs provide ~0.3 V hysteresis at 3.3 V, rejecting noise and accommodating slow-rising signals (e.g., from mechanical switches, long cables, or RC-filtered lines) without external debouncing or conditioning circuits-reducing BOM count and improving reliability in electrically noisy industrial environments.