Nexperia USA Inc. 74HC373BQ-Q100,115

Overview

74HC373BQ-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified octal D-type transparent latch with 3-state outputs, operating from 2.0 V to 6.0 V over −40 °C to +125 °C. It features independent latch enable (LE, active HIGH) and output enable (OE, active LOW), enabling bus-oriented data latching and isolation in automotive control modules, instrument clusters, and body electronics.

For engineers reviewing the 74HC373BQ-Q100 datasheet, 74HC373BQ-Q100 pinout, 74HC373BQ-Q100 application, or 74HC373BQ-Q100 equivalent, this device delivers deterministic transparent/latched behavior, sub-45 ns propagation delay at 4.5 V, high-noise-immunity CMOS inputs, and DHVQFN20 packaging with side-wettable flanks for AOI-compatible solder joint inspection.

Technical Context

This latch implements eight independent D-type flip-flops with synchronous transparent mode (LE = HIGH) and edge-triggered capture (LE HIGH→LOW transition). Each output drives a 3-state buffer controlled solely by OE, decoupled from latch state - enabling concurrent data retention and bus release.

Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The device complies with JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V), supports TTL-level inputs in the 74HCT variant, and meets AEC-Q100 Grade 1 thermal and reliability requirements for under-hood automotive use.

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 guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC373BQ-Q100, the 74HCT373BQ-Q100 offers broader input voltage compatibility in 5 V environments, while SN74LVTH373PWR provides superior speed and drive in 3.3 V industrial designs - neither matches the full AEC-Q100 Grade 1 qualification scope and wide 2.0–6.0 V operation of the original.

Availability

74HC373BQ-Q100 is available at Aetrix Electronics and suitable for automotive instrument clusters, engine control units, ADAS camera interfaces, and body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 74HC373BQ-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 for automotive, industrial, and consumer markets.

This device belongs to Nexperia's AEC-Q100-qualified automotive logic portfolio, engineered specifically for robust, low-power data latching in harsh-temperature vehicle subsystems where reliability and long-term supply stability are mandatory.

FAQ

What is the maximum clock frequency supported by the 74HC373BQ-Q100?

The 74HC373BQ-Q100 does not operate on a clock signal - it is a transparent latch controlled by the LE (latch enable) input. Its effective data throughput is governed by propagation delay (15 ns typ @ 4.5 V) and setup/hold times (12 ns su/th @ 4.5 V), enabling reliable operation with input data rates up to ~20 MHz in transparent mode and synchronous capture at comparable frequencies.

Can the exposed thermal pad on the DHVQFN20 package be left unconnected?

Yes - the exposed pad (terminal 1 index area) has no electrical requirement per Nexperia's datasheet. It may be left floating or connected to GND depending on thermal and EMI design goals. If soldered, the land must remain electrically isolated or tied to GND; no voltage potential is permitted.

How does the 74HC373BQ-Q100 differ from standard 74HC373 devices?

The "-Q100" suffix denotes full AEC-Q100 Grade 1 qualification (−40 °C to +125 °C), including extended reliability testing (HTOL, TC, ESD), automotive-grade wafer fabrication, and traceable lot control. Standard 74HC373 parts lack this qualification and are rated only to +85 °C or +125 °C without automotive stress validation.

Is there a functional difference between OE LOW and OE HIGH states?

Yes: OE LOW enables normal 3-state output operation - Q0–Q7 reflect latched or transparent data. OE HIGH forces all outputs into high-impedance (Z) state regardless of LE or D-input states. This allows bus sharing without affecting internal latch contents, enabling safe multi-master arbitration.