Nexperia USA Inc. 74HC573BQ-Q100,115

Overview

74HC573BQ-Q100 from Nexperia is an automotive-grade octal D-type transparent latch with 3-state outputs, latch enable (LE) and output enable (OE) control inputs, operating across 2.0 V to 6.0 V supply, qualified to AEC-Q100 Grade 1 (−40 °C to +125 °C), and housed in a DHVQFN20 package with side-wettable flanks for AOI-compatible solder joint inspection. It functions as a bidirectional bus interface latch in microprocessor I/O expansion and automotive body control modules.

For engineers reviewing the 74HC573BQ-Q100 datasheet, 74HC573BQ-Q100 pinout, 74HC573BQ-Q100 application, or 74HC573BQ-Q100 equivalent, this device supports transparent latching with sub-30 ns propagation delay at 4.5 V, TTL- or CMOS-level input compatibility (via HC/HCT variants), and high-noise-immunity operation in safety-critical vehicle subsystems requiring stable data capture and bus isolation.

Technical Context

The device implements eight independent D-type latches with synchronous LE control: when LE is HIGH, Qn follows Dn in real time (transparent mode); when LE transitions LOW, the input state is captured and held. OE operates independently-asserting OE LOW disables all outputs to high-impedance without affecting latch contents.

Input clamp diodes allow safe interfacing to voltages exceeding VCC using current-limiting resistors. The DHVQFN20 package features thermal enhancement and side-wettable flanks for automated optical inspection of solder joints-critical for automotive manufacturing traceability and reliability validation.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, no leads, 20 terminals, side-wettable flanks for AOI, exposed thermal pad (non-electrical, floating or GND-connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT573BQ-Q100, the HC variant offers superior noise immunity in high-EMI zones but requires stronger drive from upstream logic; versus SN74LV573AQPWRQ1, the Nexperia part delivers faster timing at 4.5–5 V and AOI-ready packaging critical for automotive Tier-1 manufacturing.

Availability

74HC573BQ-Q100 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, infotainment display interfaces, and ADAS camera data buffering requiring stable component supply across extended temperature ranges and rigorous quality traceability.

Supply support for 74HC573BQ-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 components for automotive, industrial, and consumer markets, with leadership in logic, MOSFETs, and ESD protection devices.

This device belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust data latching and bus isolation in safety-critical vehicle subsystems operating under harsh thermal and EMI conditions.

FAQ

What is the maximum clock frequency supported by the 74HC573BQ-Q100?

The 74HC573BQ-Q100 does not operate on a clock signal-it is a transparent latch controlled by level-sensitive LE and OE inputs. Its usable data rate depends on propagation delay (17 ns typ @ 4.5 V) and setup/hold timing (13 ns max su, 5 ns min h @ 4.5 V), supporting effective sampling rates up to ~20 MHz in synchronous systems with proper timing margins.

Can the 74HC573BQ-Q100 be used with 3.3 V microcontrollers?

Yes-the device operates from 2.0 V to 6.0 V and is fully specified at 3.3 V. At VCC = 3.3 V, VIH = 2.31 V min and VIL = 1.09 V max ensure reliable interfacing with standard 3.3 V CMOS outputs; output VOH = 2.97 V min and VOL = 0.26 V max meet 3.3 V logic thresholds with margin.

Is the thermal pad on the DHVQFN20 package electrically connected?

No-the exposed thermal pad (terminal 1 index area) has no electrical function per datasheet note (1). It may remain floating or be connected to GND for thermal improvement, but no electrical requirement exists for soldering or connectivity; mechanical anchoring is sufficient for reliability.

How does the 74HC573BQ-Q100 differ from the 74HC573D-Q100 (SO20)?

Both share identical logic functionality and AEC-Q100 qualification, but differ in package: BQ uses DHVQFN20 (2.5 × 4.5 mm, side-wettable flanks, AOI-capable), while D uses SO20 (7.5 mm width, gull-wing leads). The BQ offers superior thermal performance, smaller footprint, and automated solder-joint inspection-key for high-density automotive PCBs.