Nexperia USA Inc. 74ALVC573PW,112

Overview

74ALVC573PW,112 from Nexperia is an 8-bit D-type transparent latch with 3-state outputs, designed for bus interface and data hold functions in low-voltage digital systems. It operates across 1.65 V to 3.6 V supply, features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and supports -40 °C to +125 °C industrial temperature range - used in FPGA I/O expansion and microcontroller peripheral buffering.

For engineers reviewing the 74ALVC573PW,112 datasheet, 74ALVC573PW,112 pinout, 74ALVC573PW,112 application, or 74ALVC573PW,112 equivalent, key selection criteria include latch enable (LE) timing, 3-state output disable behavior, IOFF current blocking at VCC = 0 V, and compatibility with mixed-voltage TTL/CMOS logic domains.

Technical Context

The device implements eight independent D-type latches with shared LE and OE controls: LE HIGH enables transparent data flow from Dn to Qn; LE LOW captures and holds input state; OE LOW disables all outputs into high-impedance mode without affecting latch contents. Schmitt-trigger inputs tolerate slow signal edges, enabling robust operation with noisy or RC-filtered signals.

IOFF circuitry actively disables outputs when VCC = 0 V, preventing backflow current during partial system power-down - critical for hot-swap and multi-rail power sequencing. Input overvoltage tolerance up to 3.6 V allows safe interfacing with higher-voltage logic even at lower VCC.

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 transparent latch applications.

Compared with SN74LVC573APWR, the 74ALVC573PW,112 provides essential IOFF protection for power sequencing, while versus 74LVCH16373ADGG it offers minimal footprint and lower BOM cost for 8-bit-only implementations - making it optimal for space-constrained industrial controllers.

Availability

74ALVC573PW,112 is available at Aetrix Electronics and suitable for industrial PLCs, FPGA carrier boards, automotive infotainment modules, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ALVC573PW,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 headquartered in Nijmegen, Netherlands, specializing in high-performance logic, discrete, and MOSFET solutions for industrial, automotive, and computing markets.

The 74ALVC family targets low-voltage, high-speed logic interfacing with emphasis on power efficiency, noise immunity, and robustness in harsh environments - specifically engineered for mixed-signal system integration and partial-power-down architectures.

FAQ

What is the minimum pulse width required on the LE input?

The minimum LE HIGH pulse width is 3.3 ns across all VCC ranges (1.65–3.6 V), verified per Table 7 of the datasheet. This ensures reliable capture of input data without metastability. Pulse widths below this threshold may result in incomplete latching or undefined output states, especially at temperature extremes.

Can 74ALVC573PW,112 interface directly with 5 V TTL logic?

Yes - its inputs tolerate up to 3.6 V regardless of VCC, and its outputs swing rail-to-rail (VOL ≤ 0.55 V, VOH ≥ 2.2 V at VCC = 3.0 V), meeting TTL input thresholds. However, direct 5 V output driving is not supported; use level translators for bidirectional 5 V bus interfacing.

How does the IOFF feature behave during power-down?

When VCC = 0 V, the IOFF circuit disables all outputs, limiting OFF-state leakage to ±10 μA maximum (per Table 6). This prevents reverse current flow from powered downstream circuits into the unpowered latch - critical for backplane hot-swap and multi-rail sequencing integrity.

Is the TSSOP20 package (SOT360-1) compatible with standard SO20 footprints?

No - SOT360-1 has 0.65 mm pitch and 4.4 mm body width, while SO20 (SOT163-1) uses 1.27 mm pitch and 7.5 mm width. They are mechanically incompatible; separate PCB land patterns are required. Thermal performance also differs: TSSOP20 derates at 10.0 mW/K above 100 °C.