Nexperia USA Inc. 74ALVC374BQ,115

Overview

74ALVC374BQ,115 from Nexperia is an octal positive-edge-triggered D-type flip-flop with 3-state outputs in a 20-terminal DHVQFN package (SOT764-1), operating from 1.65 V to 3.6 V supply, featuring IOFF partial power-down protection, Schmitt-trigger inputs for noise immunity, and guaranteed operation from –40 °C to +125 °C - used for data latching and bus isolation in high-density digital logic systems.

For engineers reviewing the 74ALVC374BQ,115 datasheet, 74ALVC374BQ,115 pinout, 74ALVC374BQ,115 application, or 74ALVC374BQ,115 equivalent, key selection considerations include its 3.6 ns max propagation delay at 3.3 V, 24 mA output drive capability, IOFF-enabled backflow prevention during power sequencing, and compatibility with mixed-voltage TTL/CMOS interfaces in industrial control and communications infrastructure.

Technical Context

This device implements eight independent D-type flip-flops synchronized on the LOW-to-HIGH transition of the CP input, with asynchronous 3-state control via active-low OE. Each flip-flop samples Dn inputs only when OE is low and CP rises, preserving stored state otherwise.

Schmitt-trigger inputs tolerate slow-rising signals up to 10 ns/V (at VCC ≥ 2.7 V), while the IOFF circuit disables outputs and blocks current flow when VCC = 0 V - enabling safe hot-insertion and partial power-down in multi-rail systems without external isolation.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 × 4.5 × 0.85 mm body, no leads, thermal pad (terminal 1 index area), 20 terminals, exposed die pad not electrically connected unless intentionally tied to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type flip-flop applications.

Compared with SN74LVC374APWR and 74LVCH16374ADGG, the 74ALVC374BQ,115 uniquely combines extended temperature operation, IOFF protection, and Schmitt-trigger inputs - making it the only option among the three qualified for automotive under-hood and industrial hot-swap applications requiring simultaneous noise immunity and power sequencing safety.

Availability

74ALVC374BQ,115 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive body electronics requiring stable component supply across extended temperature ranges and rigorous power sequencing.

Supply support for 74ALVC374BQ,115 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 high-volume, high-reliability logic, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The 74ALVC374BQ,115 belongs to Nexperia's ALVC (Advanced Low-Voltage CMOS) logic family, engineered for low-power, high-speed bus interface and data latching in mixed-voltage systems demanding robust ESD, latch-up immunity, and extended temperature performance.

FAQ

What is the maximum clock frequency supported by the 74ALVC374BQ,115?

The device supports a maximum clock frequency of 150 MHz at VCC = 3.0–3.6 V, verified by its 3.6 ns maximum propagation delay (tpd) and 3.3 ns minimum clock pulse width (tW). At lower supply voltages (e.g., 1.65–1.95 V), fmax drops to 50 MHz due to increased tpd and reduced drive strength - always verify timing margins using the specific VCC and temperature conditions in your design.

Does the 74ALVC374BQ,115 require external pull-up or pull-down resistors on its inputs?

No external biasing is required: all inputs feature Schmitt-trigger action with built-in hysteresis (≥0.3 V at 3.3 V), ensuring clean switching even with slow or noisy signals. However, floating inputs must be avoided - tie unused Dn or OE pins to VCC or GND to prevent undefined logic states and excessive ICC.

Can the 74ALVC374BQ,115 be used in a system where VCC is powered down while other rails remain active?

Yes - the IOFF circuit actively disables outputs and blocks current flow when VCC = 0 V, limiting backflow to ±80 μA maximum. This allows safe use in hot-swap modules and multi-rail systems where logic I/O may remain biased while the core supply is cycled, provided OE is held HIGH during power-down.

How does the DHVQFN20 (SOT764-1) package of the 74ALVC374BQ,115 improve thermal performance compared to SO20 or TSSOP20?

The DHVQFN20 package features an exposed thermal pad (terminal 1 index area) that, when soldered to a PCB copper pour, reduces junction-to-board thermal resistance by ~30% versus TSSOP20 and ~50% versus SO20. This enables sustained 500 mW total power dissipation at +125 °C ambient - critical for high-density logic arrays operating near thermal limits.