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

Nexperia USA Inc. 74AHC74PW/S400J

Name: 74AHC74PW/S400J
Brand: Nexperia USA Inc.
SKU: 74AHC74PW/S400J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHC74PW/S400J

Manufacturer:: Nexperia USA Inc.

Category:: Flip Flops

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74AHC74PW/S400J.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74AHC74PW/S400J from NXP Semiconductors is a dual D-type flip-flop with complementary outputs, non-inverting inputs, and independent set/reset controls. It operates at 2V–5.5V supply, features 7.5ns typical propagation delay at 5V, and supports 100MHz maximum clock frequency in high-speed logic applications such as clock division and data synchronization in industrial control interfaces.

For engineers reviewing the 74AHC74PW/S400J datasheet, 74AHC74PW/S400J pinout, 74AHC74PW/S400J application, or 74AHC74PW/S400J equivalent, key selection criteria include guaranteed 2V minimum V_CC operation, rail-to-rail output swing, low dynamic power consumption (0.5µA I_CC at standby), and compatibility with 3.3V/5V mixed-signal system interfacing.

Technical Context

This device implements two independent edge-triggered D flip-flops in a single TSSOP-14 package. Each section includes asynchronous active-low preset (PR̅) and clear (CLR̅) inputs, enabling direct state initialization without clock dependency. The flip-flops respond to the rising edge of the clock signal (CP), ensuring deterministic timing behavior in synchronous digital systems.

Designed for AHC logic family compatibility, it delivers CMOS-level input thresholds, TTL-compatible output drive capability (±8mA), and ESD protection exceeding 2kV HBM. Its propagation delay variation across voltage and temperature is tightly controlled to support reliable setup/hold timing margins in FPGA companion logic and microcontroller peripheral handshaking circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	AHC - advanced high-speed CMOS with 5V tolerance and low power
Supply Voltage Range	2.0V to 5.5V - enables interoperability between 3.3V and 5V subsystems
Max Clock Frequency	100 MHz at V_CC = 5V - supports high-speed data latching in real-time control loops
Propagation Delay (t_PD)	7.5 ns typical at V_CC = 5V - ensures tight timing alignment in multi-stage pipeline logic
Output Drive Strength	±8 mA at V_CC = 4.5V - sufficient to drive 50Ω transmission lines or multiple 74-series inputs
Input Threshold Voltage	V_IH = 3.15V min, V_IL = 1.35V max at V_CC = 4.5V - provides noise margin >0.8V in noisy industrial environments

Pinout & Package

74AHC74PW/S400J is housed in a 14-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, JEDEC MO-153 compliant, and rated for −40°C to +125°C operating temperature.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	Data Input (D)	Asynchronous data capture point for each flip-flop stage; high-impedance CMOS input
2, 5, 11, 14	Q Output	True output of respective D flip-flop; drives downstream logic or bus lines
3, 6, 12	Q̅ Output	Complementary output; enables differential signaling or reset feedback paths
7	GND	Ground reference for all internal circuitry and I/O buffers
14	V_CC	Positive supply rail; must be decoupled locally with 100nF ceramic capacitor
8, 9	CP (Clock)	Rising-edge sensitive clock input; determines exact sampling instant of D input
1, 3, 10, 12	PR̅ / CLR̅	Active-low asynchronous preset/clear; overrides clock and data to force known state

Key Features

Feature	Design Value
Wide Supply Range (2.0–5.5V)	Eliminates level-shifting requirements when interfacing with mixed-voltage microcontrollers and FPGAs
Rising-Edge Triggering	Ensures deterministic state transitions synchronized to system clock edges, reducing metastability risk
Independent Asynchronous Controls	Allows per-stage initialization or forced reset without halting clock distribution network
Low Dynamic Power Consumption	Reduces thermal load in dense PCB layouts and extends battery life in portable instrumentation

Applications

Industrial PLC I/O Expansion

Digital Audio Sample Rate Conversion

Use Scenario: Latching sensor status bits from parallel input modules before serial upload to main controller.

IC Role / Device Role / Timing Role: Dual D flip-flop acting as synchronous register bank with independent reset for channel isolation.

Use Value: Guarantees glitch-free capture of fast-changing field signals under varying EMI conditions due to robust input thresholds and edge-triggered sampling.

Use Scenario: Aligning asynchronous audio data streams from ADCs and DACs operating at different sample clocks.

IC Role / Device Role / Timing Role: Edge-triggered storage element synchronizing data between clock domains in SRC hardware blocks.

Use Value: Enables precise bit-level timing alignment with sub-10ns jitter contribution, preserving audio fidelity during resampling.

Automotive Body Control Module

Test Equipment Pattern Generation

Use Scenario: Debouncing mechanical switch inputs (e.g., door latch sensors) before feeding to CAN controller interrupt logic.

IC Role / Device Role / Timing Role: Synchronous edge detector and state stabilizer using clocked D flip-flop with asynchronous clear.

Use Value: Provides deterministic 2-clock-cycle debouncing window with immunity to contact bounce duration variations across temperature.

Use Scenario: Generating stable, repeatable test vectors for ASIC validation using programmable logic sequencers.

IC Role / Device Role / Timing Role: Building block for shift registers and state machines in pattern generator clock domain.

Use Value: Delivers consistent 7.5ns propagation delay across voltage and temperature, critical for nanosecond-accurate vector timing.

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
74LVC74APW	Lower V_CC range (1.65–3.6V); 3.3V-only operation; 3.5ns t_PD at 3.3V	Suitable only for 3.3V systems; not 5V-tolerant	Select when system uses exclusively 3.3V logic and requires faster switching
SN74AUP2G74DCUR	Single-channel, ultra-low power (0.9µA I_CC), 1.8–3.6V only, SC70-8 package	Limited to space-constrained, battery-powered designs; no 5V interface capability	Choose for portable devices where power budget is <1µA and dual-channel functionality is not required

Compared with 74AHC74PW/S400J, the 74LVC74APW offers higher speed but sacrifices 5V interoperability, while the SN74AUP2G74DCUR reduces size and quiescent current at the cost of channel count and voltage flexibility-making the AHC variant optimal for mixed-voltage industrial control where robustness and compatibility are prioritized.

Availability

74AHC74PW/S400J is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC74PW/S400J 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74AHC logic series targets high-reliability, mixed-voltage digital interfacing in harsh environments-designed specifically for industrial control, factory automation, and automotive subsystems demanding wide V_CC range and robust ESD performance.

FAQ

Is 74AHC74PW/S400J compatible with 3.3V microcontroller GPIOs?

Yes. With V_CC = 3.3V, its input thresholds (V_IL ≤ 1.0V, V_IH ≥ 2.0V) and output levels (V_OH ≥ 3.1V, V_OL ≤ 0.2V) meet 3.3V LVTTL specifications. It drives standard 3.3V logic loads directly without level shifters, and its 2V–5.5V supply range allows seamless integration into mixed-voltage boards.

What is the maximum allowable clock rise time for reliable operation?

The datasheet specifies a maximum input transition time of 10 ns for guaranteed setup/hold timing compliance. Exceeding this may cause metastability or missed clock edges. For reliable operation at 100 MHz, use controlled-impedance routing with <10 ns edge rate, and avoid slow-rising clock sources such as RC-filtered oscillators or unterminated traces.

Can PR̅ and CLR̅ be used simultaneously on the same flip-flop?

No. Asserting both PR̅ and CLR̅ low simultaneously violates the recommended operating conditions and results in undefined output states (Q and Q̅ may become identical). The datasheet explicitly prohibits concurrent assertion; only one asynchronous control should be active at a time to ensure predictable initialization behavior.

Does this device support hot insertion or live insertion into powered backplanes?

No. 74AHC74PW/S400J lacks hot-swap protection features such as power-up sequencing control, I_OFF isolation, or bus-hold circuitry. Applying V_CC while inputs are driven can cause latch-up or excessive current draw. Always power the device before applying signal voltages, and use series resistors or dedicated hot-swap controllers if live insertion is required.

74AHC74PW/S400J Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74AHC

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Bulk

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:: 115 MHz

Max Propagation Delay @ V, Max CL:: 9.3ns @ 5V, 50pF

Trigger Type:: Positive Edge

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

Voltage - Supply:: 2V ~ 5.5V

Current - Quiescent (Iq):: 2 µA

Input Capacitance:: 3 pF

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

74AHC74PW/S400J FAQ

1.How can I place an order for 74AHC74PW/S400J through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHC74PW/S400J 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 74AHC74PW/S400J reliable?

The price and inventory of 74AHC74PW/S400J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC74PW/S400J is usually 5 days.

3.What payment methods are accepted for 74AHC74PW/S400J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC74PW/S400J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHC74PW/S400J?

74AHC74PW/S400J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHC74PW/S400J 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 74AHC74PW/S400J?

For technical support, including 74AHC74PW/S400J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC74PW/S400J requirements.

6.How does Aetrix verify that 74AHC74PW/S400J is sourced from the original manufacturer or authorized distributors?

All 74AHC74PW/S400J 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 74AHC74PW/S400J meets industry standards.

7.What is the process for return or replacement of 74AHC74PW/S400J?

All 74AHC74PW/S400J units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC74PW/S400J, 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 74AHC74PW/S400J part is unused and in its original packaging.

Return procedure for 74AHC74PW/S400J:

1.Submit a request within 90 days.

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

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