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

Texas Instruments SN74F374DWR

Name: SN74F374DWR
Brand: Texas Instruments
SKU: SN74F374DWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74F374DWR

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: SN74F374DWR.pdf

Description:: IC FF D-TYPE SNGL 8BIT 20SOIC

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Product details

Overview

SN74F374DWR from Texas Instruments is an 8-bit edge-triggered D-type flip-flop IC with 3-state bus-driver outputs, designed for high-capacitance or low-impedance bus interfacing. It features positive-edge clock triggering, buffered output enable (OE), full parallel data loading, and operates from 4.5 V to 5.5 V at 0°C to 70°C - ideal for I/O port buffering and bidirectional data bus control in legacy industrial control systems.

For engineers reviewing the SN74F374DWR datasheet, SN74F374DWR pinout, SN74F374DWR application, or SN74F374DWR equivalent, key selection considerations include its 20-pin SOIC (DW) package, 70 MHz max clock frequency, 3.2 ns CLK-to-Q propagation delay, high-impedance output state control via OE, and compatibility with TTL-level logic families in legacy board designs.

Technical Context

The SN74F374DWR implements eight independent D-type flip-flops synchronized to the rising edge of CLK, with each Q output latching the corresponding D input value at clock transition. Its 3-state outputs are controlled solely by OE - internal flip-flop operation continues regardless of OE state, enabling data retention or update during bus isolation.

Designed for F-series TTL logic, it delivers ±24 mA low-level output drive and supports 50 pF capacitive loads with guaranteed timing across temperature. The buffered OE and CLK inputs reduce fanout constraints and improve noise immunity compared to unbuffered variants, making it suitable for direct connection to microprocessor data buses without additional level-shifting or pull-up components.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	F-series TTL - ensures compatibility with legacy 5 V TTL systems and predictable voltage thresholds (VIH = 2 V, VIL = 0.8 V).
Max Clock Frequency	70 MHz - supports high-speed data latching in real-time control and instrumentation interfaces.
CLK-to-Q Propagation Delay	3.2 ns (min) to 10 ns (max) - enables tight timing margins in synchronous bus architectures.
Output Drive Capability	24 mA sink current - sufficient to drive multiple TTL inputs or moderate PCB traces without external buffers.
Operating Temperature	0°C to 70°C - qualified for commercial/industrial ambient environments, not extended or automotive grade.
Supply Voltage Range	4.5 V to 5.5 V - stable operation within standard 5 V ±10% power rails common in legacy systems.
Input Capacitance	Typical 4 pF per input - minimizes loading on upstream drivers and preserves signal integrity.

Pinout & Package

SN74F374DWR is housed in a 20-pin SOIC (DW) package measuring 12.8 mm × 7.5 mm × 2.65 mm, with 1.27 mm lead pitch and RoHS-compliant NiPdAu lead finish. It is supplied in tape-and-reel format (2000 pcs/reel) with MSL Level-1 rating.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Data Inputs (D1–D8)	Asynchronous parallel data inputs; sampled on rising CLK edge and latched to respective Q outputs.
9	GND	Power ground reference for all internal circuitry and output drivers.
10	CLK	Positive-edge-triggered clock input; controls simultaneous latching of all eight D inputs.
11, 13, 14, 15, 16, 17, 18, 19	Q Outputs (Q1–Q8)	True (non-inverted) latched outputs; placed in high-impedance state when OE is high.
20	VCC	Positive supply terminal (4.5–5.5 V); powers all logic and output stages.
12	OE	Active-low output enable; when high, forces all Q outputs into high-Z state without affecting internal latch state.

Key Features

Feature	Design Value
3-State Bus Driving Outputs	Enables shared-bus architectures by allowing outputs to be electrically isolated without disabling internal register state.
Buffered Control Inputs (CLK, OE)	Reduces input loading and improves noise margin - critical for reliable operation in noisy industrial environments.
Full Parallel Access	Supports simultaneous loading of all 8 bits on one clock edge, simplifying interface design with microcontrollers and ASICs.
High-Impedance Output State Retention	Allows new data to be loaded or old data retained while outputs remain tri-stated - essential for hot-swap or dynamic bus reconfiguration.
TTL-Compatible Input/Output Levels	Guaranteed VIH ≥ 2 V and VOL ≤ 0.5 V ensure interoperability with standard 5 V TTL logic families without level translation.

Applications

Industrial PLC I/O Modules	Legacy Microprocessor Data Bus Interface
Use Scenario: Isolating and latching sensor/actuator signals in programmable logic controller backplanes with shared data buses. IC Role / Device Role / Timing Role: Acts as an 8-bit input latch and output buffer, synchronizing field-side signals to the CPU clock domain while enabling bus contention avoidance via OE control. Use Value: Eliminates need for discrete pull-up resistors or bus transceivers, reducing BOM count and PCB area in space-constrained DIN-rail modules.	Use Scenario: Interfacing Z80 or 8086-based embedded controllers to peripheral devices requiring synchronized data capture and bus driving. IC Role / Device Role / Timing Role: Serves as a bidirectional data register - capturing incoming data on CLK↑ and driving outgoing data onto the data bus under OE control. Use Value: Provides deterministic 3.2 ns min CLK-to-Q delay and 24 mA drive strength, ensuring setup/hold compliance and robust signal integrity across long backplane traces.
Test Equipment Digital Pattern Generators	Avionics Maintenance Diagnostic Interfaces
Use Scenario: Generating precise, synchronized digital stimulus waveforms for functional testing of digital subsystems. IC Role / Device Role / Timing Role: Functions as a parallel pattern register, holding test vectors until triggered by system clock, then presenting them simultaneously on 8-bit output lines. Use Value: Delivers sub-10 ns propagation skew between outputs, minimizing timing skew across multi-channel test signals and improving measurement repeatability.	Use Scenario: Adapting legacy avionics LRUs (Line Replaceable Units) to modern diagnostic test sets using standardized 5 V TTL signaling. IC Role / Device Role / Timing Role: Provides galvanically isolated bus interface capability through high-Z output control, preventing back-driving of sensitive aircraft bus lines during diagnostics. Use Value: Enables safe, non-intrusive readback of LRU status registers and write access to configuration registers without disrupting operational bus traffic.

Industrial PLC I/O Modules

Legacy Microprocessor Data Bus Interface

Use Scenario: Isolating and latching sensor/actuator signals in programmable logic controller backplanes with shared data buses.

IC Role / Device Role / Timing Role: Acts as an 8-bit input latch and output buffer, synchronizing field-side signals to the CPU clock domain while enabling bus contention avoidance via OE control.

Use Value: Eliminates need for discrete pull-up resistors or bus transceivers, reducing BOM count and PCB area in space-constrained DIN-rail modules.

Use Scenario: Interfacing Z80 or 8086-based embedded controllers to peripheral devices requiring synchronized data capture and bus driving.

IC Role / Device Role / Timing Role: Serves as a bidirectional data register - capturing incoming data on CLK↑ and driving outgoing data onto the data bus under OE control.

Use Value: Provides deterministic 3.2 ns min CLK-to-Q delay and 24 mA drive strength, ensuring setup/hold compliance and robust signal integrity across long backplane traces.

Test Equipment Digital Pattern Generators

Avionics Maintenance Diagnostic Interfaces

Use Scenario: Generating precise, synchronized digital stimulus waveforms for functional testing of digital subsystems.

IC Role / Device Role / Timing Role: Functions as a parallel pattern register, holding test vectors until triggered by system clock, then presenting them simultaneously on 8-bit output lines.

Use Value: Delivers sub-10 ns propagation skew between outputs, minimizing timing skew across multi-channel test signals and improving measurement repeatability.

Use Scenario: Adapting legacy avionics LRUs (Line Replaceable Units) to modern diagnostic test sets using standardized 5 V TTL signaling.

IC Role / Device Role / Timing Role: Provides galvanically isolated bus interface capability through high-Z output control, preventing back-driving of sensitive aircraft bus lines during diagnostics.

Use Value: Enables safe, non-intrusive readback of LRU status registers and write access to configuration registers without disrupting operational bus traffic.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit D-type latch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LS374N	Lower speed (50 MHz max), higher propagation delay (15–25 ns), reduced drive (8 mA), but lower ICC (19 mA vs 55 mA typical).	Better suited for low-power, cost-sensitive designs where timing margins are relaxed and bus capacitance is minimal.	Select SN74LS374N only if system clock < 30 MHz and power budget is constrained; avoid for high-speed or heavy-load buses.
SN74ACT374DW	CMOS technology, 5 V tolerant, 100 MHz max clock, 3-state outputs, but requires 4.5–5.5 V supply and has different input thresholds (VIH = 3.5 V).	Compatible with mixed-voltage systems and offers superior noise immunity, but not TTL-input-compatible without level shifting.	Choose SN74ACT374DW for new designs needing higher speed and lower power; verify input voltage compatibility before replacing SN74F374DWR.

Compared with SN74LS374N, SN74F374DWR provides 40% higher clock rate and 3× stronger output drive - critical for driving long traces or multiple loads. Against SN74ACT374DW, it offers native TTL input compatibility and simpler integration in legacy 5 V systems, though at higher static power consumption.

Availability

SN74F374DWR is available at Aetrix Electronics and suitable for industrial control systems, legacy microprocessor interfaces, and test equipment requiring stable component supply and long-term obsolescence management.

Supply support for SN74F374DWR 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

Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions with deep heritage in industrial and military-grade components.

The SN74F374DWR belongs to TI's F-series TTL logic family, engineered for high-speed, robust operation in demanding industrial and instrumentation applications where reliability and timing predictability are critical.

FAQ

What is the maximum clock frequency supported by the SN74F374DWR?

The SN74F374DWR supports a maximum clock frequency of 70 MHz under recommended operating conditions (VCC = 4.5 V to 5.5 V, TA = 0°C to 70°C). This specification is validated with CL = 50 pF and RL = 500 Ω load conditions, and represents the highest guaranteed toggle rate for reliable data capture across all eight flip-flops in the SN74F374DWR device.

Does the SN74F374DWR support hot-swapping or dynamic bus reconfiguration?

Yes - the SN74F374DWR supports dynamic bus reconfiguration because its output enable (OE) input places all Q outputs in high-impedance state without affecting internal latch operation. This allows new data to be loaded or existing data retained while the bus is isolated, enabling safe insertion/removal in live backplane systems using the SN74F374DWR as a buffer register.

Is the SN74F374DWR pin-compatible with other 74F374 variants like SN74F374N or SN74F374DBR?

Yes - the SN74F374DWR shares identical 20-pin functionality and pinout with all SN74F374 variants including SN74F374N (PDIP) and SN74F374DBR (SSOP), as confirmed by TI's logic diagram and package drawings. Only package dimensions and thermal characteristics differ; no PCB layout changes are required when substituting among these SN74F374DWR-compatible packages.

What is the output drive capability of the SN74F374DWR, and how does it compare to LS-series equivalents?

The SN74F374DWR delivers up to 24 mA of low-level output current (IOL), significantly exceeding the 8 mA of SN74LS374 devices. This higher drive strength allows the SN74F374DWR to directly drive longer PCB traces, heavier capacitive loads (up to 50 pF), or multiple TTL inputs without external buffers - a key advantage in dense industrial backplane designs using the SN74F374DWR.

Can the SN74F374DWR operate reliably at 4.5 V supply voltage?

Yes - the SN74F374DWR is fully specified down to 4.5 V supply voltage, with guaranteed performance across all key parameters including VIH (2 V min), VOL (0.5 V max at 24 mA), and tPLH/tPHL (≤10 ns). Its recommended operating range explicitly includes 4.5 V to 5.5 V, making the SN74F374DWR suitable for systems with marginal 5 V rails or brown-out conditions.

SN74F374DWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74F

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 100 MHz

Max Propagation Delay @ V, Max CL:: 8.5ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 3mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Iq):: -

Input Capacitance:: -

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

SN74F374DWR FAQ

1.How can I place an order for SN74F374DWR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74F374DWR 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 SN74F374DWR reliable?

The price and inventory of SN74F374DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F374DWR is usually 5 days.

3.What payment methods are accepted for SN74F374DWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F374DWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74F374DWR?

SN74F374DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74F374DWR 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 SN74F374DWR?

For technical support, including SN74F374DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F374DWR requirements.

6.How does Aetrix verify that SN74F374DWR is sourced from the original manufacturer or authorized distributors?

All SN74F374DWR 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 SN74F374DWR meets industry standards.

7.What is the process for return or replacement of SN74F374DWR?

All SN74F374DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74F374DWR, 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 SN74F374DWR part is unused and in its original packaging.

Return procedure for SN74F374DWR:

1.Submit a request within 90 days.

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

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