Nexperia USA Inc. 74ALVC74BQ,115

Overview

74ALVC74BQ from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (SD) and reset (RD) inputs, complementary Q/Q̅ outputs per channel, 1.65 V to 3.6 V supply range, -40 °C to +125 °C operating temperature, and IOFF partial power-down protection. It serves as a synchronous storage element in digital control logic, clock domain interfacing, and state-holding circuits in industrial microcontroller peripherals.

For engineers reviewing the 74ALVC74BQ datasheet, 74ALVC74BQ pinout, 74ALVC74BQ application, or 74ALVC74BQ equivalent, key selection criteria include propagation delay (≤4.4 ns at 3.6 V), set-up/hold timing (0.8 ns / −0.1 ns), Schmitt-trigger input tolerance for slow edges, IOFF-enabled backflow prevention during power sequencing, and DHVQFN14 thermal-enhanced packaging for high-density PCB layouts.

Technical Context

This device implements two independent edge-triggered D flip-flops sharing no internal coupling-each with dedicated D, CP, SD, RD, Q, and Q̅ terminals. Its Schmitt-trigger inputs accept slow-rising/falling signals without oscillation, enabling robust interfacing with mechanical switches or RC-debounced sources.

The IOFF circuit actively disables outputs when VCC = 0 V, blocking reverse current flow through powered-down sections of mixed-voltage systems. All static and dynamic parameters-including tpd, tsu, th, and fmax-are fully characterized across the full −40 °C to +125 °C range and 1.65 V–3.6 V supply window.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 mm × 3.0 mm × 0.85 mm body, no leads, exposed thermal pad (non-soldered by default), 14 terminals in quad arrangement with terminal 1 index area marked.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC74APWR and 74AUP2G74DC, the 74ALVC74BQ uniquely combines extended temperature operation, IOFF-enabled power sequencing, Schmitt-trigger noise immunity, and sub-4.5 ns propagation delay-making it the only option qualified for thermally demanding, multi-rail industrial and automotive control logic.

Availability

74ALVC74BQ is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical infusion pump controllers, and 5G small cell baseband timing requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74ALVC74BQ 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, analog, and MOSFET solutions for automotive, industrial, and mobile markets.

The 74ALVC series delivers advanced low-voltage CMOS logic optimized for mixed-supply systems, emphasizing robustness across voltage and temperature extremes while maintaining pin compatibility with legacy 74-series functions.

FAQ

Can 74ALVC74BQ operate reliably at 1.65 V supply with full timing specifications?

Yes. All dynamic parameters-including tpd (≤6.2 ns), tsu (1.2 ns), and fmax (150 MHz)-are guaranteed across the full −40 °C to +125 °C range at VCC = 1.65 V to 1.95 V, per Table 6 and Table 7 of the official Nexperia datasheet Rev. 8. This ensures deterministic behavior in ultra-low-power industrial sensor nodes.

Is the thermal pad (Pin 1) in the DHVQFN14 package electrically connected?

No. The exposed pad (Pin 1 index area) has no electrical function. Nexperia explicitly states it requires no solder connection; if soldered, the land must remain floating or tied to GND-never to VCC or signal nets-to avoid thermal stress or parasitic coupling.

How does the IOFF feature behave when VCC is ramping during power-up?

IOFF activates automatically when VCC falls below ~0.8 V, disabling outputs before VCC reaches 0 V. During power-up, outputs remain in high-impedance until VCC exceeds the minimum functional threshold (~1.2 V), preventing glitch-induced switching on downstream loads during brown-out conditions.

Are the 1Q/1Q̅ and 2Q/2Q̅ outputs truly complementary under all valid operating conditions?

Yes. Functional Table 3 and Figure 4 confirm that Q and Q̅ are logically inverted and simultaneously updated on each active clock edge. Static characteristics (Table 6) guarantee VOH ≥ VCC − 0.2 V and VOL ≤ 0.55 V across all VCC and temperature ranges, ensuring >1.5 V noise margin between asserted states.