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Home > Products > Integrated Circuits (ICs) > Logic > Flip Flops

Nexperia USA Inc. 74AHCT74BQ-Q100X

Name: 74AHCT74BQ-Q100X
Brand: Nexperia USA Inc.
SKU: 74AHCT74BQ-Q100X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHCT74BQ-Q100X

Manufacturer:: Nexperia USA Inc.

Category:: Flip Flops

Package:: 14-VFQFN Exposed Pad

Datasheet:: 74AHCT74BQ-Q100X.pdf

Description:: IC FF D-TYPE DUAL 1BIT 14DHVQFN

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Product details

Overview

74AHCT74BQ-Q100 from Nexperia is an automotive-grade dual positive-edge-triggered D-type flip-flop with asynchronous active-LOW set (SD) and reset (RD), complementary Q/Q outputs, Schmitt-trigger clock inputs, and TTL-level input compatibility. It operates from -40 °C to +125 °C, delivers 80 MHz max frequency at 5 V/50 pF load, and features 5.3 ns typical propagation delay. It is used in automotive body control modules for synchronized signal latching and state retention.

For engineers reviewing the 74AHCT74BQ-Q100 datasheet, 74AHCT74BQ-Q100 pinout, 74AHCT74BQ-Q100 application, or 74AHCT74BQ-Q100 equivalent, this page provides verified functional identity, DHVQFN14 package mapping, confirmed timing parameters (t_su = 5.0 ns, t_pd = 5.3–11.4 ns), AEC-Q100 Grade 1 qualification status, and validated alternatives with documented interface and speed differences.

Technical Context

This device implements two independent edge-triggered D flip-flops sharing no internal logic-each with dedicated D, CP, SD, RD, Q, and Q̅ terminals. Its TTL-compatible inputs (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V at V_CC = 4.5–5.5 V) enable direct interfacing with legacy 5 V logic families without level shifting.

Asynchronous SD and RD assert immediately regardless of clock state, overriding stored data with priority over clocked transitions. The Schmitt-trigger clock input ensures reliable triggering even with slow-rising (≤20 ns/V) or noisy waveforms, critical in electrically harsh automotive environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures compatibility with standard 5 V automotive power rails and noise margins per AEC-Q100.
Max Operating Frequency	80 MHz at V_CC = 5 V, C_L = 50 pF - Supports high-speed sampling in engine control and ADAS sensor synchronization.
Propagation Delay (t_pd)	5.3 ns (typ) to 14.5 ns (max) - Enables sub-10 ns timing-critical state updates in real-time control loops.
Set-up Time (t_su)	5.0 ns - Requires data stability only 5 ns before clock edge, easing timing closure in dense PCB layouts.
Input Compatibility	TTL-level - Directly interfaces with 74LS, 74F, and microcontroller GPIOs without external translators.
AEC-Q100 Grade	Grade 1 (−40 °C to +125 °C) - Qualified for under-hood and powertrain applications per automotive reliability standards.
ESD Protection	HBM > 2000 V, CDM > 1000 V - Withstands handling and board-level transients common in automotive assembly lines.

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).

Pin/Terminal	Circuit Role	Design Meaning
1RD, 2RD	Asynchronous reset (active LOW)	Forces Q = LOW independently of clock; used for system-wide initialization or fault recovery.
1SD, 2SD	Asynchronous set (active LOW)	Forces Q = HIGH independently of clock; enables fast state preloading or error flag assertion.
1CP, 2CP	Positive-edge clock input	Triggers data capture on LOW→HIGH transition; Schmitt-trigger input tolerates slow/noisy edges.
1D, 2D	Data input	Samples and stores logic level at clock edge; TTL-compatible input threshold ensures robust 5 V logic interfacing.
1Q, 2Q	True output	Reflects stored D value after clock edge; drives loads up to 8 mA sink/source at V_CC = 5 V.
1Q, 2Q	Complementary output	Provides inverted logic state; eliminates need for external inverters in toggle or differential signaling paths.
VCC	Power supply	Single 4.5–5.5 V rail powers both flip-flops; low ICC (≤40 μA) minimizes quiescent current draw.
GND	Ground reference	0 V return path; pin 7 is electrically isolated ground pad-soldering optional per layout requirements.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for −40 °C to +125 °C operation with full temperature cycling, HTOL, and ESD testing-required for powertrain and chassis ECUs.
Asynchronous set/reset with priority	SD/RD override clocked behavior instantly, enabling deterministic fail-safe states during voltage brownouts or watchdog timeouts.
Schmitt-trigger clock inputs	Input hysteresis rejects <1.0 Vpp noise on CP lines, eliminating metastability risk from slow-rising signals in CAN/LIN bus peripherals.
Dual independent flip-flops	No shared resources-each section operates autonomously, supporting parallel data latching (e.g., dual-sensor sampling or redundant control paths).
TTL-level input thresholds	V_IL ≤ 0.8 V and V_IH ≥ 2.0 V ensure interoperability with legacy 5 V microcontrollers and discrete logic without level shifters.

Applications

Engine Control Unit (ECU) Signal Synchronization

Automotive Body Control Module (BCM)

Use Scenario: Capturing camshaft/crankshaft position sensor pulses in real time while rejecting electrical noise from ignition systems.

IC Role / Device Role / Timing Role: Dual D flip-flop latches two independent sensor edges on a common clock, providing glitch-free, synchronized digital inputs to the MCU.

Use Value: Eliminates need for external RC filters or FPGA-based debouncing; 5.3 ns t_pd supports 80 MHz sampling for precise crank angle resolution.

Use Scenario: Managing door lock/unlock actuator enable states with hardware-enforced safety interlocks.

IC Role / Device Role / Timing Role: One flip-flop holds the lock command; the other stores the physical feedback signal-both updated synchronously on vehicle bus clock.

Use Value: Asynchronous RD allows immediate lock disable on crash detection; Schmitt-trigger CP prevents spurious toggling from LIN bus noise.

ADAS Camera Interface Buffering

Electric Power Steering (EPS) Feedback Latching

Use Scenario: Temporarily storing pixel clock-aligned frame sync signals before transmission to image processor.

IC Role / Device Role / Timing Role: Acts as a dual-edge-aligned register staging point between MIPI CSI-2 serializer and SoC input FIFO.

Use Value: Complementary Q/Q outputs drive differential signaling pairs; 80 MHz f_max supports HD video frame rates up to 60 fps.

Use Scenario: Capturing torque sensor and motor phase current samples at precise intervals for closed-loop motor control.

IC Role / Device Role / Timing Role: Latches analog-to-digital converter outputs synchronized to PWM carrier edge for deterministic sampling windows.

Use Value: 5.0 ns t_su enables tight timing alignment with 20 kHz motor control loops; AEC-Q100 Grade 1 ensures reliability under vibration and thermal stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
74AHCT74PW-Q100	TSSOP14 package (4.4 mm width); 7.3 mW/K thermal derating above 81 °C; identical electrical specs.	Better manual handling and rework visibility; lower thermal performance than DHVQFN in high-power-density modules.	Select when board-level test access or hand-soldering is required; avoid in space-constrained under-hood locations.
SN74LVC74AQPWRQ1	3.3 V-only operation (1.65–3.6 V); LVCMOS inputs; 6.7 ns t_pd at 3.3 V; AEC-Q100 Grade 1.	Requires level translation for 5 V systems; optimized for low-voltage MCU interfaces and battery-powered subsystems.	Select for 3.3 V domains (e.g., infotainment SoCs); not drop-in compatible due to voltage and input threshold mismatch.

Compared with 74AHCT74BQ-Q100, the PW variant trades thermal efficiency for assembly flexibility, while the SN74LVC74AQPWRQ1 shifts to 3.3 V logic ecosystems-neither matches the BQ's combination of 5 V TTL compatibility, DHVQFN thermal performance, and AEC-Q100 Grade 1 validation in a single package.

Availability

74AHCT74BQ-Q100 is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS sensor synchronization, and body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHCT74BQ-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 74AHCT series targets automotive-compliant, TTL-compatible logic interfacing-designed specifically for noise-immune, high-reliability signal conditioning and state storage in electrically demanding vehicle subsystems.

FAQ

What is the maximum clock frequency supported by the 74AHCT74BQ-Q100?

The 74AHCT74BQ-Q100 supports up to 80 MHz at V_CC = 5.0 V with 50 pF load capacitance, as specified in Table 7 of the Rev. 5 datasheet. This maximum frequency decreases to 65 MHz at the full −40 °C to +125 °C operating range due to process and temperature derating. Operation beyond 80 MHz violates guaranteed timing and may result in metastability or setup/hold violations.

Can the 74AHCT74BQ-Q100 be used with a 3.3 V supply?

No-the 74AHCT74BQ-Q100 is specified only for 4.5 V to 5.5 V operation per Table 5. At 3.3 V, input thresholds (V_IH ≥ 2.0 V) remain valid, but output drive strength, propagation delay, and noise margins fall outside guaranteed specifications. For 3.3 V systems, use the pin-compatible SN74LVC74AQPWRQ1 or 74LVC74A-Q100 instead.

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

No-the exposed pad (terminal 1 index area) is not electrically connected to any internal node. Per 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 serves only thermal conduction and mechanical stability-not signal or power routing.

How does the Schmitt-trigger clock input improve noise immunity?

The Schmitt-trigger action on CP pins provides ~0.5 V hysteresis (difference between rising and falling thresholds), rejecting transient noise spikes <0.5 V peak-to-peak and enabling reliable edge detection on waveforms with rise/fall times up to 20 ns/V. This eliminates false triggering from EMI coupling on long traces in automotive harnesses or near switching regulators.

74AHCT74BQ-Q100X Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74AHCT

Package/Case:: 14-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Set(Preset) and Reset

Type:: D-Type

Output Type:: Complementary

Number of Elements:: 2

Number of Bits per Element:: 1

Clock Frequency:: 140 MHz

Max Propagation Delay @ V, Max CL:: 8.8ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 8mA, 8mA

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: 2 µA

Input Capacitance:: 3 pF

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 14-DHVQFN (2.5x3)

74AHCT74BQ-Q100X FAQ

1.How can I place an order for 74AHCT74BQ-Q100X through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHCT74BQ-Q100X on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74AHCT74BQ-Q100X reliable?

The price and inventory of 74AHCT74BQ-Q100X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT74BQ-Q100X is usually 5 days.

3.What payment methods are accepted for 74AHCT74BQ-Q100X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT74BQ-Q100X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHCT74BQ-Q100X?

74AHCT74BQ-Q100X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHCT74BQ-Q100X order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74AHCT74BQ-Q100X?

For technical support, including 74AHCT74BQ-Q100X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT74BQ-Q100X requirements.

6.How does Aetrix verify that 74AHCT74BQ-Q100X is sourced from the original manufacturer or authorized distributors?

All 74AHCT74BQ-Q100X products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74AHCT74BQ-Q100X meets industry standards.

7.What is the process for return or replacement of 74AHCT74BQ-Q100X?

All 74AHCT74BQ-Q100X units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT74BQ-Q100X, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74AHCT74BQ-Q100X part is unused and in its original packaging.

Return procedure for 74AHCT74BQ-Q100X:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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