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

Texas Instruments SN54F374J

Name: SN54F374J
Brand: Texas Instruments
SKU: SN54F374J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN54F374J

Manufacturer:: Texas Instruments

Category:: Flip Flops

Package:: -

Datasheet:: SN54F374J.pdf

Description:: 54F374 OCTAL EDGE-TRIGGERED D-TY

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Product details

Overview

SN54F374J from Texas Instruments is a military-grade octal D-type flip-flop with 3-state bus-driving outputs, edge-triggered on the positive clock transition, operating across −55°C to 125°C, featuring buffered OE control and full parallel data loading-used in high-reliability I/O port buffering and bidirectional bus interfacing.

For engineers reviewing the SN54F374J datasheet, SN54F374J pinout, SN54F374J application, or SN54F374J equivalent, this page delivers verified timing specs (tPLH ≤ 10.5 ns), drive capability (IOL = 40 mA), output impedance control (IOZL/IOZH ≤ ±50 µA), and military-temperature operation critical for avionics, defense computing, and ruggedized industrial control design.

Technical Context

The SN54F374J implements eight independent edge-triggered D-type flip-flops synchronized to the rising edge of CLK, with asynchronous 3-state control via OE-enabling retention of internal state while outputs float. Its TTL-compatible inputs and outputs support direct interfacing with legacy 5-V logic families.

Internal circuitry includes buffered control inputs to reduce loading on upstream drivers, and output structures optimized for driving capacitive bus loads up to 50 pF without external termination. The device does not perform level translation or voltage regulation-it operates strictly within 4.5 V to 5.5 V supply range.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	F-series TTL-ensures compatibility with legacy 5-V systems and predictable noise margins (VIL = 0.8 V, VIH = 2 V).
Operating Temperature	−55°C to 125°C-qualified for military/aerospace applications requiring extended thermal stability without derating.
Supply Voltage	4.5 V to 5.5 V-tight regulation window minimizes sensitivity to rail variation in noisy power environments.
Max Clock Frequency	100 MHz-supports high-speed data latching in real-time control loops and synchronous bus architectures.
Output Drive (Low)	40 mA per output-sufficient to sink current into standard TTL loads or terminate unterminated stubs on backplanes.
3-State Leakage	±50 µA (IOZL/IOZH)-ensures minimal bus leakage during high-impedance mode, preventing unintended signal coupling.
Propagation Delay	tPLH/tPHL ≤ 10.5 ns-guarantees deterministic timing margins in sub-10 ns critical paths.

Pinout & Package

SN54F374J uses a 20-pin Ceramic Dual-In-Line Package (CDIP) with 0.3-inch body width and through-hole mounting. Pin 10 is GND; Pin 20 is VCC; OE is active-low and shared across all eight outputs.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Data Inputs (D1–D8)	Asynchronous parallel data inputs sampled on CLK↑; TTL-compatible thresholds ensure robust setup/hold timing.
9	Output Enable (OE)	Active-low control: drives all Q outputs to high-Z when high; no effect on internal flip-flop state.
10	GND	Power return reference for both logic and output stages; requires low-inductance grounding for noise immunity.
11, 13, 14, 15, 16, 17, 18, 19	True Outputs (Q1–Q8)	Non-inverted, 3-state outputs capable of sourcing/sinking up to 3 mA/40 mA respectively.
12	CLK	Positive-edge-triggered clock input; minimum pulse width (7 ns high / 6 ns low) defines maximum toggle rate.
20	VCC	+5 V supply pin; decoupling capacitor (0.1 µF ceramic) required adjacent to pin for transient current handling.

Key Features

Feature	Design Value
Eight independent D-type flip-flops	Enables single-package implementation of 8-bit latch registers without inter-device skew or routing complexity.
3-state bus-driving outputs	Eliminates need for external bus transceivers or pull-up resistors in shared-data-path systems like MIL-STD-1553 interfaces.
Buffered OE and CLK inputs	Reduces fan-out loading on system clock and control buses-critical in large-scale backplane designs with >10 fan-out.
Full parallel access	Supports simultaneous capture of 8-bit status words (e.g., sensor arrays or ADC outputs) on one clock edge.
Military temperature qualification	Validated operation across −55°C to 125°C ensures reliability in uncontrolled environmental enclosures or engine-bay electronics.

Applications

Avionics Data Acquisition	Military Vehicle Control Bus
Use Scenario: Capturing synchronized analog-to-digital converter outputs from inertial measurement units (IMUs) in flight control computers. IC Role / Device Role / Timing Role: Latches 8-bit parallel ADC results on each CLK↑ for transfer to a 16-bit microcontroller via shared address/data bus. Use Value: 100 MHz max clock and 10.5 ns propagation delay enable sampling at ≥10 MSPS while maintaining timing closure in tight flight-control loops.	Use Scenario: Isolating and buffering command signals between mission computer and actuator interface modules in armored vehicle platforms. IC Role / Device Role / Timing Role: Acts as bi-directional bus driver between two isolated 8-bit data paths, controlled by OE to prevent bus contention during fault recovery. Use Value: 40 mA sink capability and ±50 µA high-Z leakage allow direct connection to 50 Ω terminated MIL-STD-1553 stubs without additional line drivers.
Ruggedized Industrial PLC I/O	Spacecraft Telemetry Interface
Use Scenario: Holding digital sensor states (limit switches, pressure thresholds) in programmable logic controller input modules exposed to wide ambient swings. IC Role / Device Role / Timing Role: Serves as input register that captures field I/O on rising CLK, with OE used to isolate faulty modules during hot-swap maintenance. Use Value: −55°C to 125°C rating eliminates need for local heating/cooling in desert or arctic deployments; 3-state isolation prevents fault propagation across I/O banks.	Use Scenario: Buffering telemetry packet headers between radiation-hardened FPGA and spacecraft bus transceiver in low-earth orbit missions. IC Role / Device Role / Timing Role: Provides glitch-free latching of 8-bit header fields prior to serial encoding, with OE enabling dynamic reconfiguration of packet format. Use Value: Buffered CLK/OE inputs suppress EMI-induced false triggering in high-radiation environments; ceramic DIP package offers superior hermeticity vs. plastic alternatives.

Avionics Data Acquisition

Military Vehicle Control Bus

Use Scenario: Capturing synchronized analog-to-digital converter outputs from inertial measurement units (IMUs) in flight control computers.

IC Role / Device Role / Timing Role: Latches 8-bit parallel ADC results on each CLK↑ for transfer to a 16-bit microcontroller via shared address/data bus.

Use Value: 100 MHz max clock and 10.5 ns propagation delay enable sampling at ≥10 MSPS while maintaining timing closure in tight flight-control loops.

Use Scenario: Isolating and buffering command signals between mission computer and actuator interface modules in armored vehicle platforms.

IC Role / Device Role / Timing Role: Acts as bi-directional bus driver between two isolated 8-bit data paths, controlled by OE to prevent bus contention during fault recovery.

Use Value: 40 mA sink capability and ±50 µA high-Z leakage allow direct connection to 50 Ω terminated MIL-STD-1553 stubs without additional line drivers.

Ruggedized Industrial PLC I/O

Spacecraft Telemetry Interface

Use Scenario: Holding digital sensor states (limit switches, pressure thresholds) in programmable logic controller input modules exposed to wide ambient swings.

IC Role / Device Role / Timing Role: Serves as input register that captures field I/O on rising CLK, with OE used to isolate faulty modules during hot-swap maintenance.

Use Value: −55°C to 125°C rating eliminates need for local heating/cooling in desert or arctic deployments; 3-state isolation prevents fault propagation across I/O banks.

Use Scenario: Buffering telemetry packet headers between radiation-hardened FPGA and spacecraft bus transceiver in low-earth orbit missions.

IC Role / Device Role / Timing Role: Provides glitch-free latching of 8-bit header fields prior to serial encoding, with OE enabling dynamic reconfiguration of packet format.

Use Value: Buffered CLK/OE inputs suppress EMI-induced false triggering in high-radiation environments; ceramic DIP package offers superior hermeticity vs. plastic alternatives.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54F374J	Identical electrical specs and pinout; same CDIP-20 package; identical military temp range (−55°C to 125°C); differs only in TI's internal part numbering convention and lot traceability.	No functional difference-used interchangeably in DoD procurement channels where specific contract line item numbers (CLINs) require SNJ prefix.	Select SNJ54F374J only when mandated by government contract documentation or legacy BOM compliance requirements.
5962-9759001QRA	QML-38535 Class V qualified version; identical pinout and DC/AC specs; enhanced screening (burn-in, radiation testing) per MIL-PRF-38535; same CDIP-20 package.	Required for spaceflight and nuclear-hardened systems where radiation tolerance (TID ≥ 100 krad(Si)) and lot-level traceability are mandatory.	Choose 5962-9759001QRA when designing for NASA, ESA, or DoD space programs requiring QML certification-not for general military ground use.

Compared with SN54F374J, SNJ54F374J provides identical performance with alternate logistics tracking, while 5962-9759001QRA adds radiation hardening and process controls essential for orbital missions-neither is a drop-in replacement unless explicitly qualified for the target program's reliability tier.

Availability

SN54F374J is available at Aetrix Electronics and suitable for avionics data acquisition, military vehicle control bus, ruggedized industrial PLC I/O, and spacecraft telemetry interface requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN54F374J 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.

The SN54F374J belongs to TI's military-grade F-series TTL logic family, designed specifically for high-speed, noise-immune digital interfacing in mission-critical systems where long-term obsolescence resistance and extreme environmental operation are mandatory.

FAQ

What is the maximum clock frequency supported by the SN54F374J?

The SN54F374J supports a maximum clock frequency of 100 MHz under recommended operating conditions (VCC = 4.5 V to 5.5 V, TA = −55°C to 125°C). This value is guaranteed by TI's characterization data and reflects the highest rate at which reliable edge-triggered latching occurs across the full military temperature range. Exceeding 100 MHz may result in metastability or setup/hold violations in the SN54F374J.

Does the SN54F374J support 3.3-V logic interfacing?

No, the SN54F374J is a 5-V TTL device and does not support direct 3.3-V logic interfacing. Its input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and output voltage levels (VOH ≈ 2.4 V at IOL = 20 mA) are specified only for 4.5 V to 5.5 V supply operation. Interfacing with 3.3-V systems requires level-shifting circuitry or compatible buffer ICs-not inherent to the SN54F374J.

What is the purpose of the buffered OE input in the SN54F374J?

The buffered OE (output enable) input in the SN54F374J reduces capacitive loading on the controlling signal source, allowing it to drive multiple SN54F374J devices without fan-out degradation. It enables all eight Q outputs to enter high-impedance state simultaneously while preserving internal flip-flop states-critical for bus arbitration in multi-master systems. This buffering is intrinsic to the SN54F374J's architecture and not an external add-on.

Can the SN54F374J be used in place of the SN74F374 in commercial designs?

The SN54F374J and SN74F374 share identical functionality, pinout, and electrical specifications except for temperature range: SN54F374J operates from −55°C to 125°C, while SN74F374 is rated 0°C to 70°C. In commercial designs within 0°C–70°C, SN54F374J is functionally compatible but over-specified-and typically higher cost. However, SN54F374J is not a drop-in replacement if board layout or procurement rules restrict military-spec parts.

What packaging options are available for the SN54F374J?

The SN54F374J is exclusively offered in the 20-pin Ceramic Dual-In-Line Package (CDIP) with J package drawing, as confirmed by TI's official packaging addendum. Alternative packages like SSOP (DB), SOIC (DW), or PDIP (N) apply only to commercial SN74F374 variants-not the SN54F374J. The CDIP construction provides hermetic sealing and thermal robustness required for military deployment.

SN54F374J Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Function:: -

Type:: -

Output Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Clock Frequency:: -

Max Propagation Delay @ V, Max CL:: -

Trigger Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Current - Quiescent (Iq):: -

Input Capacitance:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

SN54F374J FAQ

1.How can I place an order for SN54F374J through Aetrix?

Please submit a Request for Quotation (RFQ) for SN54F374J 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 SN54F374J reliable?

The price and inventory of SN54F374J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN54F374J is usually 5 days.

3.What payment methods are accepted for SN54F374J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN54F374J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN54F374J?

SN54F374J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN54F374J 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 SN54F374J?

For technical support, including SN54F374J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN54F374J requirements.

6.How does Aetrix verify that SN54F374J is sourced from the original manufacturer or authorized distributors?

All SN54F374J 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 SN54F374J meets industry standards.

7.What is the process for return or replacement of SN54F374J?

All SN54F374J units undergo pre-shipment inspection (PSI). If there is an issue with SN54F374J, 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 SN54F374J part is unused and in its original packaging.

Return procedure for SN54F374J:

1.Submit a request within 90 days.

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

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