Nexperia USA Inc. 74ALVC573D,118

Overview

74ALVC573D,118 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for data latching and bus isolation in digital systems. It operates across 1.65 V to 3.6 V supply, features independent latch enable (LE) and output enable (OE) controls, supports -40 °C to +125 °C operation, and includes IOFF partial power-down protection. Used in microcontroller peripheral interfacing and memory address latching.

For engineers reviewing the 74ALVC573D,118 datasheet, 74ALVC573D,118 pinout, 74ALVC573D,118 application, or 74ALVC573D,118 equivalent, key selection factors include its 3-state output timing (tdis ≤ 5.1 ns at 3.6 V), Schmitt-trigger input tolerance, IOFF-enabled power-down safety, and SO20 package compatibility with legacy 74-series board layouts.

Technical Context

This device implements eight independent D-type latches with transparent mode when LE is HIGH and edge-triggered capture on LE HIGH-to-LOW transition. Each latch output is individually controlled by a global OE input that forces high-impedance without affecting internal latch states.

Schmitt-trigger inputs ensure robust noise immunity against slow-rising signals, while the IOFF circuit disables outputs during VCC = 0 V to prevent backflow current-critical for hot-swap and multi-rail system designs. All static and dynamic parameters are fully characterized from -40 °C to +125 °C.

Key Specifications

Pinout & Package

74ALVC573D,118 uses the SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm lead pitch, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transparent latch applications.

Compared with SN74LVC573APWR, 74ALVC573D,118 provides superior power-down safety via IOFF and faster timing; versus 74LVCH16373ADGG, it offers lower cost and smaller footprint for 8-bit applications without over-engineering.

Availability

74ALVC573D,118 is available at Aetrix Electronics and suitable for microcontroller bus expansion, FPGA I/O buffering, industrial sensor acquisition, and automotive body control modules requiring stable component supply across extended temperature ranges.

Supply support for 74ALVC573D,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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing facilities focused on automotive-grade reliability.

The 74ALVC series targets low-voltage, high-speed digital interfacing applications where power efficiency, noise immunity, and robustness across wide temperature ranges are critical design requirements.

FAQ

What is the maximum clock frequency supported by 74ALVC573D,118?

The 74ALVC573D,118 does not operate on a clock signal-it is a transparent latch controlled by level-sensitive LE and OE inputs. Its effective data throughput is governed by propagation delay (≤3.8 ns at 3.6 V), supporting asynchronous bus rates up to ~260 MHz in transparent mode. Timing margins must account for setup/hold times (tsu = 0.8 ns, th = 0.7 ns) relative to LE transitions.

Can 74ALVC573D,118 interface directly with 5 V TTL logic?

No-74ALVC573D,118 inputs tolerate up to 3.6 V absolute maximum, and its outputs swing only to VCC (max 3.6 V). While it accepts 5 V inputs safely due to overvoltage-tolerant inputs, its outputs cannot drive standard 5 V TTL inputs reliably. A level shifter or 5 V-tolerant buffer (e.g., 74LVC245) is required for bidirectional 5 V interface.

How does the IOFF feature protect the device during power-down?

When VCC = 0 V, the IOFF circuit actively disables all output drivers, limiting OFF-state leakage to ±80 μA maximum. This prevents reverse current flow from live system buses into the unpowered device-critical for hot-plug systems, multi-rail power sequencing, and avoiding latch-up or damage in partial-power-down scenarios.

Is the SO20 package of 74ALVC573D,118 pin-compatible with older 74HC573 devices?

Yes-the SO20 (SOT163-1) package uses identical 20-pin mechanical dimensions and pinout as legacy 74HC573 and 74HCT573 devices. However, electrical differences exist: 74ALVC573D,118 operates down to 1.65 V, has faster timing, Schmitt-trigger inputs, and IOFF-making it a functional upgrade with backward-compatible mounting.