Nexperia USA Inc. 74AHC573BQ-Q100X

Overview

74AHC573BQ-Q100 from Nexperia is an automotive-grade 8-bit D-type transparent latch with 3-state outputs, latch enable (LE) and output enable (OE) control, overvoltage-tolerant inputs up to 5.5 V, operating from 2.0 V to 5.5 V supply, and qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C). It serves as a bus interface or data hold element in automotive body control modules, instrument clusters, and ADAS domain controllers where voltage translation and noise-immune latching are required.

For engineers reviewing the 74AHC573BQ-Q100 datasheet, 74AHC573BQ-Q100 pinout, 74AHC573BQ-Q100 application, or 74AHC573BQ-Q100 equivalent, this device delivers precise timing-controlled data capture with balanced propagation delays (as low as 3.9 ns at 5 V), Schmitt-trigger inputs for noise immunity, and DHVQFN20 packaging with side-wettable flanks for automated optical inspection in high-reliability automotive PCB assembly.

Technical Context

The 74AHC573BQ-Q100 implements eight independent D-type latches with transparent mode operation when LE is HIGH and edge-triggered storage on LE HIGH-to-LOW transition. Its 3-state outputs are controlled solely by OE (active LOW), independent of latch state, enabling shared bus arbitration without disturbing stored data.

Input overvoltage tolerance (up to 5.5 V regardless of VCC) supports mixed-voltage interfacing - e.g., 3.3 V logic latching 5 V sensor data - while CMOS input thresholds (VIH = 3.85 V min at VCC = 5.5 V) ensure compatibility with standard logic families. The device uses silicon-gate CMOS technology for low static current (ICC ≤ 80 μA at 5.5 V) and high noise immunity.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1), 2.5 mm × 4.5 mm × 0.85 mm body, no leads, side-wettable flanks for AOI-compatible solder joint inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT573BQ-Q100, the AHC variant offers lower input current and better noise margins; versus SN74LV573AQPWRQ1, it provides superior thermal inspection capability via side-wettable flanks and tighter propagation delay consistency across temperature.

Availability

74AHC573BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, instrument cluster interfaces, ADAS domain controllers, and power distribution units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC573BQ-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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for automotive, industrial, and consumer applications.

The 74AHC573BQ-Q100 belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for robust data latching in harsh environments with emphasis on voltage translation, ESD resilience, and manufacturability in high-volume automotive PCB assembly.

FAQ

What is the maximum clock/data frequency supported by the 74AHC573BQ-Q100?

The device does not operate on a clock signal but responds to LE and OE edges. Its maximum usable data rate is determined by propagation delay and setup/hold times: with tpd = 3.9 ns (typ) and tsu/th = 3.5 ns/1.5 ns at 5 V, it reliably captures data up to ~100 MHz in transparent mode when driven by a synchronous source meeting timing constraints.

Can the 74AHC573BQ-Q100 be used with a 3.3 V supply while interfacing to 5 V sensors?

Yes. Its inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection of 5 V sensor outputs to D0–D7 pins when VCC = 3.3 V. Output levels will swing from 0 V to 3.3 V, so downstream receivers must accept 3.3 V logic levels.

Is the thermal pad on the DHVQFN20 package required to be soldered to ground?

No. Per Nexperia documentation, the exposed pad (terminal 1) has no electrical or mechanical requirement to be soldered. If soldered, it must remain electrically floating or be connected to GND - never left as a floating copper island that could cause EMI or reliability issues.

How does the 74AHC573BQ-Q100 differ from the standard 74AHC573 (non-Q100)?

The -Q100 suffix denotes full AEC-Q100 Grade 1 qualification: extended temperature testing (−40 °C to +125 °C), enhanced ESD robustness (HBM > 2000 V), rigorous lot traceability, and automotive-specific failure analysis protocols - none of which apply to commercial-grade 74AHC573 variants.