Nexperia USA Inc. 74LVC573ABQ-Q100X

Overview

74LVC573ABQ-Q100 from Nexperia is an automotive-grade octal D-type transparent latch with 3-state outputs, 5 V tolerant I/O, and operation from 1.2 V to 3.6 V supply. It features common Latch Enable (LE) and Output Enable (OE) controls, supports mixed-voltage interfacing between 3.3 V and 5 V systems, and is qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C) for use in body control modules and infotainment data buses.

For engineers reviewing the 74LVC573ABQ-Q100 datasheet, 74LVC573ABQ-Q100 pinout, 74LVC573ABQ-Q100 application, or 74LVC573ABQ-Q100 equivalent, this device is selected for bus-hold latching in automotive microcontroller peripheral interfaces where voltage translation, low static current (<10 μA), and fast propagation delay (≤6.5 ns at 3.3 V) are critical.

Technical Context

This latch implements eight independent D-type storage elements with transparent mode when LE is HIGH and edge-triggered capture on LE HIGH-to-LOW transition. Its dual enable architecture decouples data latching (LE) from output driving (OE), enabling independent timing control for bus arbitration and hold-before-drive sequences.

Input and output pins tolerate up to 5.5 V regardless of VCC (1.2–3.6 V), allowing direct connection to legacy 5 V logic without level shifters. The DHVQFN20 package provides thermal enhancement and side-wettable flanks for AOI-compatible solder joint inspection in automotive PCB assembly.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1), 2.5 × 4.5 × 0.85 mm body, no leads, side-wettable flanks for automated optical inspection. Exposed thermal pad (terminal 1 index area) may be left floating or connected to GND per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC573AQPWRQ1 and 74LVC573APW-Q100, the 74LVC573ABQ-Q100 offers superior thermal performance (12.9 mW/K derating above 111 °C) and AOI-ready side-wettable flanks - critical for zero-defect automotive manufacturing yield in compact ECU designs.

Availability

74LVC573ABQ-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster displays, gateway ECUs, and ADAS sensor interface circuits requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVC573ABQ-Q100 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 essential efficiency technologies, delivering high-performance logic, discrete, and MOSFET solutions optimized for automotive, industrial, and mobile markets.

The 74LVC573A-Q100 belongs to Nexperia's automotive-qualified LVC logic family, designed specifically for robust, low-power, mixed-voltage data latching in harsh-environment electronic control units.

FAQ

Can 74LVC573ABQ-Q100 operate with VCC = 1.2 V while interfacing with 5 V inputs?

Yes. The device is fully specified down to VCC = 1.2 V and maintains 5 V input tolerance across its entire supply range. Input clamping diodes and robust gate oxide design ensure reliable operation with 5 V signals even at minimum VCC, enabling ultra-low-power sleep modes without sacrificing interface compatibility.

What is the maximum capacitive load the outputs can drive while maintaining timing specs?

The datasheet specifies timing parameters (tpd, ten, tdis) with CL = 50 pF at VCC ≥ 2.7 V. Driving loads beyond 50 pF increases propagation delay and may violate setup/hold windows; for >50 pF, derating curves in Table 9 confirm stable operation up to 30 pF at 1.2 V and 50 pF at 3.0–3.6 V with defined test conditions.

Is the exposed thermal pad on the DHVQFN20 package electrically connected internally?

No. The exposed pad (terminal 1 index area) has no internal electrical connection. Per Nexperia guidance, it may be left floating or connected to GND for thermal improvement - but must not be tied to any voltage other than GND or left unconnected with unintended parasitic coupling.

How does OE assertion affect latch state integrity during power loss?

Asserting OE HIGH places outputs in high-impedance but preserves internal latch states. Even with VCC = 0 V, IOFF ≤ 20 μA ensures no backfeeding occurs, and stored data remains intact until next LE cycle - critical for fail-safe retention in automotive power-down sequences.