Nexperia USA Inc. 74AHC574PW,112

Overview

74AHC574PW,112 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 high-speed register interfacing in industrial control backplanes and FPGA I/O expansion.

For engineers reviewing the 74AHC574PW,112 datasheet, 74AHC574PW,112 pinout, 74AHC574PW,112 application, or 74AHC574PW,112 equivalent, this device serves as a voltage-flexible, low-power 8-bit latch with precise setup/hold timing (3.0 ns su / 1.5 ns h at 5 V), 3-state output enable control, and Schmitt-trigger input noise immunity - critical for reliable signal integrity in noisy embedded bus environments.

Technical Context

The 74AHC574PW,112 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, meeting strict set-up (3.0 ns min at 5 V) and hold (1.5 ns min) requirements. OE operates asynchronously and does not affect internal latch states.

Its CMOS input structure supports overvoltage tolerance to 5.5 V regardless of VCC, enabling safe level translation between 3.3 V and 5 V domains. All inputs include Schmitt-trigger action for enhanced noise rejection, and outputs drive ±8 mA while maintaining VOL ≤ 0.36 V and VOH ≥ 3.94 V at 5 V/8 mA.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1); 20-lead, 4.4 mm body width, 0.65 mm pitch; lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT574PW,112, the original part offers broader voltage flexibility and overvoltage safety, while SN74LVC574APW trades robustness for speed and lower power in strictly 3.3 V domains - making 74AHC574PW,112 the optimal choice for mixed-signal industrial backplanes.

Availability

74AHC574PW,112 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 interfaces.

Supply support for 74AHC574PW,112 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, and energy-efficient components for automotive, industrial, computing, consumer, and communications markets.

The 74AHC574PW,112 belongs to Nexperia's AHC logic family - engineered for high-speed, low-power, mixed-voltage digital interfacing with robust noise immunity and wide operating margins.

FAQ

What is the maximum clock frequency supported by the 74AHC574PW,112?

The 74AHC574PW,112 supports up to 130 MHz maximum clock frequency at VCC = 5.0 V and CL = 15 pF, and 85 MHz at CL = 50 pF. These values are guaranteed across the full −40 °C to +125 °C operating range per Nexperia's Product Data Sheet Rev. 3 (2023). Performance degrades linearly with increased capacitive load or reduced supply voltage.

Can the 74AHC574PW,112 safely interface a 5 V bus with a 3.3 V microcontroller?

Yes - all input pins are overvoltage tolerant to 5.5 V regardless of VCC, allowing direct connection to 5 V signals while powered from 3.3 V. Output levels meet 3.3 V logic thresholds (VOH ≥ 2.58 V at 4 mA, VOL ≤ 0.36 V), ensuring reliable reception by standard 3.3 V CMOS inputs without external level-shifting circuitry.

How does the 3-state output enable (OE) behave during power-up or brown-out conditions?

OE is active-low and functions independently of internal latch states. During power-up, OE defaults to HIGH (due to internal weak pull-up or external biasing), placing outputs in high-impedance mode - preventing bus contention before the system stabilizes. No power-on reset circuitry is required, but external pull-down on OE is recommended if default LOW-enable behavior is needed.

Is the 74AHC574PW,112 pin-compatible with older 74HC574 variants?

Yes - the 74AHC574PW,112 uses identical TSSOP20 pinout (SOT360-1) and logic function as 74HC574, but offers improved parameters: 2× faster propagation delay, wider 2.0–5.5 V supply range, overvoltage-tolerant inputs, and enhanced ESD protection (HBM >2000 V). No layout changes are needed for drop-in replacement in most HC-based designs.