Nexperia USA Inc. 74HC74BQ-Q100,115

Overview

74HC74BQ-Q100 from Nexperia is an automotive-qualified dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q/nQ outputs per section, Schmitt-trigger clock input for robust edge detection, and operation over -40 °C to +125 °C. It stores data on LOW-to-HIGH clock transitions with 14 ns propagation delay at VCC = 6.0 V and supports CMOS-level inputs.

For engineers reviewing the 74HC74BQ-Q100 datasheet, 74HC74BQ-Q100 pinout, 74HC74BQ-Q100 application, or 74HC74BQ-Q100 equivalent, this device serves as a timing-critical storage element in automotive control logic, engine management synchronization, and safety-related state-holding circuits where AEC-Q100 Grade 1 compliance and deterministic edge-triggered behavior are mandatory.

Technical Context

The 74HC74BQ-Q100 implements two independent D-type latches, each with fully asynchronous active-low set and reset controls that override clocked data capture. Its Schmitt-trigger clock input ensures reliable triggering even with slow-rising signals, eliminating need for external signal conditioning in noisy automotive environments.

Each flip-flop operates with symmetrical output drive (±25 mA), balanced propagation delays (tpd ≤ 45 ns at VCC = 6.0 V), and TTL-compatible input thresholds only in the 74HCT variant-this part is the 74HC version, specifying CMOS input levels (VIH ≥ 3.15 V at VCC = 4.5 V) and low static current (ICC ≤ 80 μA at +125 °C).

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, side-wettable flanks for AOI, no leads, exposed thermal pad (non-electrical, optional GND connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT74BQ-Q100 and SN74LVC2G74DCTR, the 74HC74BQ-Q100 delivers optimal balance of automotive qualification, CMOS noise margin, and dual-channel density in a manufacturable DHVQFN package - making it the preferred choice for new AEC-Q100-compliant designs requiring deterministic edge-triggered storage.

Availability

74HC74BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS modules, body control modules, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC74BQ-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.

The 74HC74BQ-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust, low-power digital signal storage in harsh-temperature automotive subsystems where functional safety and long-term reliability are critical.

FAQ

What is the maximum clock frequency supported by the 74HC74BQ-Q100?

The 74HC74BQ-Q100 supports a maximum clock frequency of 24 MHz at VCC = 6.0 V and Tamb = +125 °C, verified per dynamic characteristics Table 8. At VCC = 4.5 V and +25 °C, fmax reaches 69 MHz. Frequency capability degrades predictably with rising temperature and falling supply voltage due to increased propagation delay.

Can the 74HC74BQ-Q100 be used with 3.3 V logic systems?

Yes - the 74HC74BQ-Q100 operates down to VCC = 2.0 V and is fully specified at 3.3 V. At VCC = 3.3 V, VIH is guaranteed ≥2.1 V and VIL ≤1.35 V, ensuring compatibility with standard 3.3 V CMOS outputs. Propagation delay increases to ~25 ns, and maximum frequency reduces to ~35 MHz at +25 °C.

Is the exposed thermal pad on the DHVQFN package electrically connected?

No - the exposed pad (terminal 1 index area) is not electrically connected to any internal node. Per datasheet Section 5.1, it has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or be connected to GND; it is not a VCC or signal terminal.

How does the Schmitt-trigger clock input improve system robustness?

The Schmitt-trigger action on nCP provides hysteresis (typical 0.5 V at VCC = 4.5 V), enabling reliable edge detection on slow-rising or noisy clock signals - such as those from inductive sensors or long PCB traces in automotive environments. This eliminates metastability risk and removes need for external RC filtering or comparators.