Nexperia USA Inc. 74HC574PW,118

Overview

74HC574PW,118 from Nexperia is an 8-bit positive-edge-triggered D-type flip-flop with 3-state non-inverting outputs, designed for bus-oriented digital systems. It operates across 2.0 V to 6.0 V supply, features independent clock (CP) and active-low output enable (OE), and guarantees reliable data latching at up to 133 MHz (VCC = 6.0 V). Used in microcontroller I/O expansion, address/data bus buffering, and industrial control logic.

For engineers reviewing the 74HC574PW,118 datasheet, 74HC574PW,118 pinout, 74HC574PW,118 application, or 74HC574PW,118 equivalent, this device serves as a high-noise-immunity, CMOS-level octal register for synchronous data capture and tri-state bus management in embedded and industrial designs.

Technical Context

The 74HC574PW,118 implements eight independent D-type flip-flops sharing a common clock input (CP) and a single active-low 3-state output enable (OE). Each flip-flop captures the logic state of its D-input on the LOW-to-HIGH transition of CP, provided setup (min 2 ns at VCC = 6.0 V) and hold (min 5 ns) timing requirements are met.

OE controls output impedance independently of internal register state: when HIGH, all Q0–Q7 outputs enter high-impedance OFF-state without affecting stored data; when LOW, outputs drive CMOS-compatible levels (VOH ≥ 4.4 V, VOL ≤ 0.26 V at VCC = 4.5 V, IO = ±6 mA).

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 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 flip-flop applications.

Compared with 74HC574PW,118, the 74HCT574PW,118 offers superior TTL compatibility at no cost to pinout or bus-driving capability, while the SN74HC574PWR trades 42% lower maximum frequency and higher thermal resistance for alternate-source availability - making the Nexperia part optimal for speed- and thermal-critical industrial designs.

Availability

74HC574PW,118 is available at Aetrix Electronics and suitable for microcontroller I/O expansion, industrial bus buffering, test equipment pattern generation, and automotive body control modules requiring stable component supply across extended temperature ranges.

Supply support for 74HC574PW,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 specializing in high-performance, energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer applications.

The 74HC574 belongs to Nexperia's industry-standard 74HC logic family, engineered for robustness, low power, and wide voltage operation in demanding embedded control and signal routing applications.

FAQ

What is the minimum setup time required for reliable operation at 100 MHz?

At VCC = 6.0 V and CL = 50 pF, the datasheet specifies a minimum setup time (tsu) of 13 ns. For 100 MHz operation (10 ns period), this requires careful PCB layout with matched trace lengths and local decoupling to maintain signal integrity - actual margin is 3 ns, so use controlled-impedance routing and avoid stubs longer than 15 mm.

Can OE be toggled asynchronously while CP is active without corrupting stored data?

Yes. The OE input is fully asynchronous and does not affect internal flip-flop states. Data remains latched regardless of OE transitions, and outputs enter or exit high-Z within 36 ns (tdis max at VCC = 6.0 V). This enables dynamic bus arbitration without risk of register corruption.

Is the TSSOP20 package (SOT360-1) compatible with standard SOIC-20 footprints?

No. The TSSOP20 (SOT360-1) has 0.65 mm pin pitch and 4.4 mm body width, whereas SOIC-20 (SOT163-1) uses 1.27 mm pitch and 7.5 mm width. They are mechanically incompatible - separate PCB land patterns and reflow profiles are required for each package type.

Does the device support hot insertion or live bus connection?

Yes - input clamp diodes allow safe connection to powered buses when current-limiting resistors (≥1 kΩ) are used on D and CP lines. However, OE must be held HIGH during insertion to keep outputs in high-Z, preventing back-driving of live bus lines until system initialization completes.