Nexperia USA Inc. 74HCT74BQ-Q100,115

Overview

74HCT74BQ-Q100 from Nexperia is a dual positive-edge-triggered D-type flip-flop with independent asynchronous set (nSD) and reset (nRD) inputs, complementary Q/nQ outputs per section, TTL-compatible input levels, and operation over -40 °C to +125 °C. It stores data on LOW-to-HIGH clock transitions with 15 ns typical propagation delay at VCC = 4.5 V and supports automotive-grade timing control in engine management and ADAS domain controllers.

For engineers reviewing the 74HCT74BQ-Q100 datasheet, 74HCT74BQ-Q100 pinout, 74HCT74BQ-Q100 application, or 74HCT74BQ-Q100 equivalent, this page delivers verified functional identity, DHVQFN14 package mapping, validated pin roles, automotive temperature compliance, and direct substitution guidance for AEC-Q100-compliant digital logic design.

Technical Context

The device implements two independent edge-triggered storage cells, each with fully asynchronous active-low set and reset that override clocked data behavior. Its Schmitt-trigger clock input ensures robust operation with slow-rising signals, while clamp diodes enable safe interfacing to voltages exceeding VCC using current-limiting resistors.

Designed for automotive use, it meets AEC-Q100 Grade 1 qualification and operates across -40 °C to +125 °C with TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), symmetrical output drive (±4 mA), and low ICC (≤40 μA typical at VCC = 5.5 V).

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, side-wettable flanks for AOI-compatible solder joint inspection, 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 SN74HCT74QPWRQ1, the 74HCT74BQ-Q100 offers superior thermal dissipation and AOI-capable packaging; versus MC74HC74ADTR2G, it provides guaranteed TTL input compatibility and faster timing - making it optimal for new automotive designs requiring robust 5 V logic interfacing.

Availability

74HCT74BQ-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS camera synchronization, infotainment display latching, and powertrain CAN transceiver control requiring stable component supply across automotive production lifecycles.

Supply support for 74HCT74BQ-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-enhancing components, delivering high-performance logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74HCT74-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, engineered specifically for robust, low-power, AEC-Q100-compliant digital signal conditioning in harsh-temperature vehicle subsystems.

FAQ

What is the maximum clock frequency supported by the 74HCT74BQ-Q100?

The 74HCT74BQ-Q100 supports a maximum clock frequency of 22 MHz at VCC = 4.5 V and CL = 50 pF, based on its 18 ns typical propagation delay and 23 ns minimum pulse width requirement. At VCC = 5 V and reduced load (CL = 15 pF), operation up to 59 MHz is specified - but automotive designs typically limit to 25 MHz for margin against voltage/temp variation.

Can the 74HCT74BQ-Q100 operate with a 3.3 V supply?

No - the 74HCT74BQ-Q100 is specified only for VCC = 4.5 V to 5.5 V per JEDEC 7A and AEC-Q100 requirements. At 3.3 V, input thresholds fall outside TTL specification (VIH min = 2.0 V requires ≥4.5 V VCC for margin), and output drive degrades below usable levels. Use 74LVC74A or similar for 3.3 V systems.

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

The Schmitt-trigger action on nCP provides hysteresis (~0.3 V at VCC = 4.5 V), enabling reliable edge detection on slow-rising or noisy clock signals common in automotive environments. This eliminates metastability risk from marginal slew rates and removes need for external RC filtering or dedicated clock conditioners in ECU timing circuits.

Is the exposed thermal pad on the DHVQFN14 package electrically connected?

No - the exposed pad in SOT762-1 is not electrically tied to any internal node. Per Nexperia documentation, it has no electrical or mechanical requirement to be soldered; if connected, it must remain floating or be tied to GND. Its primary function is thermal conduction, improving θJA by ~15 °C/W compared to SO14 or TSSOP variants.