Nexperia USA Inc. 74LVT573PW,118

Overview

74LVT573PW,118 from Nexperia is a 3.3 V octal D-type transparent latch with 3-state outputs, designed for bus interfacing in high-speed digital systems. It features independent latch enable (LE, active HIGH) and output enable (OE, active LOW), bus hold inputs eliminating external pull-ups, and overvoltage-tolerant inputs up to 5.5 V - enabling direct interface with 5 V logic buses in mixed-voltage microprocessor data paths.

For engineers reviewing the 74LVT573PW,118 datasheet, 74LVT573PW,118 pinout, 74LVT573PW,118 application, or 74LVT573PW,118 equivalent, key selection criteria include propagation delay (≤5.6 ns LE→Q at 3.6 V), 3-state timing (tPZH ≤5.1 ns), bus hold current (±75–150 μA), IOFF power-down capability, and TSSOP20 package compatibility with high-density PCB layouts.

Technical Context

This BiCMOS device operates across 2.7–3.6 V supply, supporting TTL-level input thresholds while driving 32 mA sink and 32 mA source loads. Its transparent latch behavior allows real-time data pass-through when LE is HIGH, then captures and holds data on LE's HIGH-to-LOW transition - making it suitable for address/data latching in memory-mapped I/O and peripheral control.

The integrated bus hold circuitry maintains stable logic states on unused D inputs without external resistors, and the IOFF feature ensures low leakage (<100 μA) during partial power-down, preventing back-driving of powered buses - critical for hot-swap and power-gated subsystems.

Key Specifications

Pinout & Package

TSSOP20 plastic thin shrink small outline package (SOT360-1); 20-pin, 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 transparent latch applications.

Compared with SN74LVC573APWR and 74ALVC573PW,118, the 74LVT573PW,118 uniquely combines 5.5 V input tolerance, bus hold, and IOFF - making it the only option among the three that safely interfaces with 5 V buses, eliminates pull-up components, and supports partial power-down without external circuitry.

Availability

74LVT573PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microprocessor bus buffering, memory-mapped peripheral interfacing, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT573PW,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 high-volume, high-reliability logic, discrete, and MOSFET solutions - delivering performance-optimized components for industrial, automotive, and computing applications.

The 74LVT family targets high-speed, mixed-voltage digital interfacing, emphasizing robustness in noisy environments, bus integrity, and seamless integration between legacy and modern logic families.

FAQ

What is the maximum clock frequency supported by the 74LVT573PW,118?

The 74LVT573PW,118 does not use a clock; it is a transparent latch controlled by the LE (latch enable) signal. Its usable maximum strobe rate is determined by propagation delay (≤5.6 ns LE→Q at 3.6 V) and minimum pulse width (3.3 ns), supporting effective latch rates beyond 100 MHz in optimized PCB layouts with controlled impedance routing.

Can the 74LVT573PW,118 be used with a 5 V microcontroller driving its inputs?

Yes - all inputs (D0–D7, LE, OE) are overvoltage tolerant up to 5.5 V, even when VCC = 3.3 V. This allows direct connection to 5 V microcontrollers without level-shifting circuitry, provided output loads remain within 3.3 V domain specifications or are 5 V-tolerant.

Does the 74LVT573PW,118 require external pull-up resistors on unused inputs?

No - the device integrates bus hold circuitry on all D inputs (D0–D7), providing ±75–150 μA active current to maintain valid logic states on floating pins. External pull-ups are unnecessary unless specific system-level noise immunity requirements exceed the built-in hold strength.

How does the IOFF feature function during power-down sequences?

When VCC drops below 1.2 V, the IOFF circuitry activates, limiting leakage current between powered and unpowered sections to <100 μA - preventing back-driving of live buses and ensuring safe power sequencing in multi-rail systems such as industrial controllers with staggered supply ramps.