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

Texas Instruments CY74FCT2574TSOC

Name: CY74FCT2574TSOC
Brand: Texas Instruments
SKU: CY74FCT2574TSOC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY74FCT2574TSOC

Manufacturer:: Texas Instruments

Category:: Flip Flops

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

Datasheet:: CY74FCT2574TSOC.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CY74FCT2574TSOC from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with 3-state outputs, designed for high-speed bus-oriented applications. It features 25-Ω output series resistors, 12-mA sink / 15-mA source drive, I_off support for partial-power-down, and 250-MHz typical switching rate. Used in address/data latching and buffered clock distribution in industrial control backplanes.

For engineers reviewing the CY74FCT2574TSOC datasheet, CY74FCT2574TSOC pinout, CY74FCT2574TSOC application, or CY74FCT2574TSOC equivalent, key selection criteria include propagation delay (t_PLH/t_PHL ≤10 ns), 3-state enable timing (t_PZH/t_PZL ≤12.5 ns), I_off current (±1 µA at V_CC = 0 V), and SOIC-20 package compatibility with legacy FCT logic designs.

Technical Context

This device implements eight independent D-type flip-flops sharing a common buffered clock (CP) and output-enable (OE) input. Each flip-flop captures D-input state on the low-to-high CP transition, with setup time (t_su) ≥2 ns and hold time (t_th) ≥1.5 ns at V_CC = 4.75–5.25 V.

Edge-rate control circuitry and integrated 25-Ω series output resistors suppress transmission-line reflections. The I_off protection circuit disables outputs during power-down, limiting reverse current to ±1 µA when V_CC = 0 V and V_OUT = 4.5 V - enabling safe hot-insertion in mixed-voltage systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	FCT TTL-compatible with 5-V supply
Propagation Delay	t_PLH/t_PHL ≤10 ns ensures sub-100-MHz synchronous operation
Output Drive	12 mA sink / 15 mA source supports direct connection to 50-Ω transmission lines
I_off Current	±1 µA enables safe partial-power-down without external isolation
Input Voltage Levels	V_IL ≤0.8 V / V_IH ≥2.0 V guarantees interoperability with standard TTL
Output Series Resistance	25 Ω (typical) reduces signal overshoot/ringing on PCB traces
Operating Temperature	–40°C to +85°C supports industrial-grade embedded deployment

Pinout & Package

SOIC-20 package (DW), 7.6 mm × 12.83 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1 (unlimited reflow).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	D0–D7 Data Inputs	Asynchronous data inputs sampled on rising CP edge
9	GND	Ground reference for all internal logic and output drivers
10	V_CC	5-V supply rail; powers all flip-flops and 3-state output buffers
11–18	O0–O7 Outputs	3-state outputs enabled by OE; include 25-Ω series termination
19	CP	Buffered clock input; triggers all flip-flops synchronously on rising edge
20	OE	Active-low output-enable; high = high-impedance, low = driven state

Key Features

Feature	Design Value
Integrated 25-Ω output series resistors	Eliminates need for external termination resistors on PCB traces
I_off partial-power-down protection	Prevents damaging backflow current when V_CC is unpowered
Matched rise/fall times	Reduces duty-cycle distortion in clock-forwarding applications
TTL-compatible input thresholds	Direct interface with legacy 74LS/74ALS without level-shifting
Edge-rate controlled outputs	Minimizes EMI and crosstalk in dense bus layouts

Applications

Industrial Backplane Latching	Automotive Body Control Module
Use Scenario: Holding address/data bus values during microcontroller memory access cycles in programmable logic controllers. IC Role / Device Role / Timing Role: Synchronous 8-bit latch providing glitch-free bus isolation between CPU and peripheral ASICs. Use Value: 10 ns propagation delay and 12.5 ns output disable time ensure reliable setup/hold margins across 25-MHz bus clocks.	Use Scenario: Buffering sensor input signals (e.g., door lock status, window position) before ADC sampling in vehicle ECUs. IC Role / Device Role / Timing Role: Input register with I_off protection, allowing safe integration into partially powered subsystems. Use Value: ±1 µA I_off current prevents battery drain during sleep mode while maintaining signal integrity.
Test Equipment Signal Conditioning	Communications Baseband Interface
Use Scenario: Capturing parallel test pattern data from FPGA-based ATE systems before serial conversion. IC Role / Device Role / Timing Role: High-speed data capture register with 3-state outputs for multiplexed test channel routing. Use Value: 250-MHz switching rate and matched edge rates preserve signal fidelity across multi-GHz test vectors.	Use Scenario: Interfacing baseband processor parallel data buses to RF transceiver ICs in cellular infrastructure equipment. IC Role / Device Role / Timing Role: Bus-isolated register minimizing noise coupling between digital and RF sections. Use Value: On-die 25-Ω termination and edge-rate control reduce radiated emissions below CISPR-22 Class B limits.

Industrial Backplane Latching

Automotive Body Control Module

Use Scenario: Holding address/data bus values during microcontroller memory access cycles in programmable logic controllers.

IC Role / Device Role / Timing Role: Synchronous 8-bit latch providing glitch-free bus isolation between CPU and peripheral ASICs.

Use Value: 10 ns propagation delay and 12.5 ns output disable time ensure reliable setup/hold margins across 25-MHz bus clocks.

Use Scenario: Buffering sensor input signals (e.g., door lock status, window position) before ADC sampling in vehicle ECUs.

IC Role / Device Role / Timing Role: Input register with I_off protection, allowing safe integration into partially powered subsystems.

Use Value: ±1 µA I_off current prevents battery drain during sleep mode while maintaining signal integrity.

Test Equipment Signal Conditioning

Communications Baseband Interface

Use Scenario: Capturing parallel test pattern data from FPGA-based ATE systems before serial conversion.

IC Role / Device Role / Timing Role: High-speed data capture register with 3-state outputs for multiplexed test channel routing.

Use Value: 250-MHz switching rate and matched edge rates preserve signal fidelity across multi-GHz test vectors.

Use Scenario: Interfacing baseband processor parallel data buses to RF transceiver ICs in cellular infrastructure equipment.

IC Role / Device Role / Timing Role: Bus-isolated register minimizing noise coupling between digital and RF sections.

Use Value: On-die 25-Ω termination and edge-rate control reduce radiated emissions below CISPR-22 Class B limits.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit registered buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY74FCT2574CTSOC	5.2 ns max propagation delay (vs. 10 ns for CY74FCT2574TSOC); identical pinout and function	Higher-speed variant for designs requiring tighter timing margins at 33–50 MHz clock domains	Select CY74FCT2574CTSOC only if t_PLH/t_PHL < 6 ns is required; otherwise CY74FCT2574TSOC offers better noise immunity at lower cost
SN74FCT574NSR	Same FCT family but no integrated 25-Ω output resistors; requires external termination	Lacks built-in reflection suppression - unsuitable for long trace or high-noise environments	CY74FCT2574TSOC is preferred where board space is constrained or EMI compliance is critical

Compared with CY74FCT2574CTSOC and SN74FCT574NSR, the CY74FCT2574TSOC delivers optimal balance of noise reduction (via on-die 25-Ω resistors), I_off safety, and industrial temperature range - making it the default choice for robust bus interface design without layout compromises.

Availability

CY74FCT2574TSOC is available at Aetrix Electronics and suitable for industrial backplane latching, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY74FCT2574TSOC 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 delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The CY74FCT2574TSOC belongs to TI's FCT logic family - engineered for high-speed, low-noise 5-V TTL-compatible bus interfacing with integrated signal integrity features like output series resistance and I_off.

FAQ

What is the maximum clock frequency supported by the CY74FCT2574TSOC?

The CY74FCT2574TSOC has a 250-MHz typical switching rate and 10 ns maximum propagation delay (t_PLH/t_PHL), supporting reliable operation up to 50 MHz in synchronous bus applications with standard setup/hold margins. Its performance is validated across –40°C to +85°C with V_CC = 4.75–5.25 V.

Does the CY74FCT2574TSOC require external termination resistors?

No - the CY74FCT2574TSOC integrates 25-Ω output series resistors per pin, eliminating the need for external termination on PCB traces. This feature directly reduces transmission-line reflection noise and simplifies layout for high-speed bus interfaces without sacrificing signal integrity.

How does the I_off feature of the CY74FCT2574TSOC protect the system during partial power-down?

The I_off circuitry in the CY74FCT2574TSOC disables all outputs when V_CC = 0 V, limiting reverse current to ±1 µA even with outputs biased to 4.5 V. This prevents damaging backflow through the device during hot-swap or mixed-rail power sequencing - a critical capability for industrial and automotive modular systems.

Is the CY74FCT2574TSOC pin-compatible with other FCT-series octal registers?

Yes - the CY74FCT2574TSOC is functionally and pinout-compatible with CY74FCT574T and CY74FCT2374T, differing only in pin arrangement (inputs on one side, outputs on the other). Its SOIC-20 footprint matches industry-standard 74-series packages, enabling drop-in replacement in existing FCT-based designs.

What are the absolute maximum ratings for the CY74FCT2574TSOC?

The CY74FCT2574TSOC has an absolute maximum supply voltage of –0.5 V to 7 V, DC input/output voltage range of –0.5 V to 7 V, and maximum sink current per pin of 120 mA. Exceeding these ratings may cause permanent damage; operation must remain within recommended conditions: V_CC = 4.75–5.25 V, T_A = –40°C to +85°C.

CY74FCT2574TSOC Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74FCT

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

Packaging:: Tube

Product Status:: Obsolete

Function:: Standard

Type:: D-Type

Output Type:: Tri-State, Non-Inverted

Number of Elements:: 1

Number of Bits per Element:: 8

Clock Frequency:: 250 MHz

Max Propagation Delay @ V, Max CL:: 6.5ns @ 5V, 50pF

Trigger Type:: Positive Edge

Current - Output High, Low:: 15mA, 12mA

Voltage - Supply:: 4.75V ~ 5.25V

Current - Quiescent (Iq):: 200 µA

Input Capacitance:: 5 pF

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

CY74FCT2574TSOC FAQ

1.How can I place an order for CY74FCT2574TSOC through Aetrix?

Please submit a Request for Quotation (RFQ) for CY74FCT2574TSOC 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 CY74FCT2574TSOC reliable?

The price and inventory of CY74FCT2574TSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2574TSOC is usually 5 days.

3.What payment methods are accepted for CY74FCT2574TSOC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2574TSOC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY74FCT2574TSOC?

CY74FCT2574TSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY74FCT2574TSOC 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 CY74FCT2574TSOC?

For technical support, including CY74FCT2574TSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2574TSOC requirements.

6.How does Aetrix verify that CY74FCT2574TSOC is sourced from the original manufacturer or authorized distributors?

All CY74FCT2574TSOC 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 CY74FCT2574TSOC meets industry standards.

7.What is the process for return or replacement of CY74FCT2574TSOC?

All CY74FCT2574TSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2574TSOC, 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 CY74FCT2574TSOC part is unused and in its original packaging.

Return procedure for CY74FCT2574TSOC:

1.Submit a request within 90 days.

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

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