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

Texas Instruments CY74FCT2374TSOCTE4

Name: CY74FCT2374TSOCTE4
Brand: Texas Instruments
SKU: CY74FCT2374TSOCTE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY74FCT2374TSOCTE4

Manufacturer:: Texas Instruments

Category:: Flip Flops

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

Datasheet:: CY74FCT2374TSOCTE4.pdf

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

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Product details

Overview

CY74FCT2374TSOCTE4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus-oriented digital systems. It features 25-Ω output series resistors, I_off partial-power-down support, matched rise/fall times, and TTL-compatible input/output logic levels. It operates at 5 V with 10 ns max propagation delay and is used in high-noise industrial control backplanes and data acquisition buses.

For engineers reviewing the CY74FCT2374TSOCTE4 datasheet, CY74FCT2374TSOCTE4 pinout, CY74FCT2374TSOCTE4 application, or CY74FCT2374TSOCTE4 equivalent, key selection criteria include 3-state bus driving capability, 25-Ω on-die termination, I_off protection during power sequencing, 12 mA sink / 15 mA source drive strength, and SOIC-20 package compatibility with legacy FCT logic designs.

Technical Context

The CY74FCT2374TSOCTE4 implements eight independent D-type latches triggered on the low-to-high clock (CP) transition, with synchronous storage and asynchronous 3-state control via OE. Its edge-rate control circuitry shapes output transitions to suppress transmission-line reflections without external components.

All eight flip-flops share a common buffered CP input and a single OE input; when OE is high, all outputs enter high-impedance state regardless of internal register state. The I_off feature disables outputs and blocks current backflow when V_CC = 0 V, enabling safe hot-insertion and partial-power-down operation in mixed-voltage systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	FCT (Fast CMOS TTL-compatible), fully interoperable with 74F/74LS inputs and outputs
Propagation Delay (t_PLH/t_PHL)	2–10 ns at V_CC = 4.75–5.25 V - enables reliable 100 MHz+ clocking in synchronous bus interfaces
Output Drive	12 mA sink / 15 mA source - sufficient to drive 50-pF loads across 15-cm PCB traces without signal integrity degradation
On-Die Termination	25 Ω series output resistance - eliminates need for discrete series resistors and reduces board-level EMI by damping reflections
I_off Current	±1 µA at V_CC = 0 V - prevents damaging back-current flow during power sequencing or hot-swap events
ESD Protection	2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for robustness in manufacturing and field environments
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications

Pinout & Package

Package: SOIC-20 (DW), 7.6 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu finish.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Output Enable	Active-low global 3-state control; asserts high-impedance on all O0–O7 when high
2–9 (D0–D7)	Data Inputs	Independent asynchronous D inputs for each flip-flop; sampled on rising CP edge
10 (GND)	Ground	Power return reference for logic and I/O; must be low-inductance connection
11 (V_CC)	Supply Voltage	+4.75 V to +5.25 V supply; decoupling capacitor required within 1 cm
12–19 (O0–O7)	3-State Outputs	Registered, edge-driven outputs with 25-Ω series termination; high-Z when OE = high
20 (CP)	Clock Input	Buffered positive-edge-triggered clock; synchronizes all eight D inputs to outputs

Key Features

Feature	Design Value
On-die 25-Ω series termination	Reduces PCB trace reflection noise without external resistors, simplifying layout and improving signal fidelity on long buses
I_off partial-power-down protection	Prevents reverse current flow when V_CC is unpowered, enabling safe insertion into live backplanes or mixed-rail systems
Matched t_r/t_f output edges	Minimizes ground bounce and crosstalk in dense multi-bit bus routing by balancing switching transients
TTL-compatible input thresholds	V_IL ≤ 0.8 V and V_IH ≥ 2.0 V allow direct interfacing with legacy 74LS/74F logic without level-shifting
Reduced V_OH (typ. 3.3 V)	Provides margin for interfacing with 3.3-V receivers while maintaining full 5-V noise immunity on inputs

Applications

Industrial Backplane Bus	Test Equipment Data Capture
Use Scenario: Synchronizing parallel sensor data from multiple modules onto a shared 8-bit data bus in programmable logic controllers. IC Role / Device Role / Timing Role: Octal register capturing analog-to-digital converter outputs on rising clock edge, then presenting stable values to bus transceivers under OE control. Use Value: On-die 25-Ω termination ensures clean signal edges across 20-cm backplane traces, eliminating reflection-induced sampling errors at 25 MHz bus rates.	Use Scenario: Capturing real-time waveform samples from high-speed ADCs in automated test equipment before buffering to memory. IC Role / Device Role / Timing Role: Edge-triggered latch holding 8-bit sample words synchronized to system clock, with OE enabling burst-mode transfer to FIFO controllers. Use Value: Matched rise/fall times and 12 mA drive capability maintain timing margins across temperature, supporting ±0.5 ns jitter tolerance in 100 MS/s capture systems.
Programmable Logic Interface	Legacy System Upgrade
Use Scenario: Interfacing FPGA I/O banks to legacy 5-V peripheral buses requiring precise setup/hold timing and bus contention control. IC Role / Device Role / Timing Role: Registered buffer isolating FPGA core logic from 5-V bus voltage and providing deterministic 3-state control during configuration cycles. Use Value: I_off protection allows FPGA reconfiguration while peripherals remain powered, preventing latch-up during partial reconfiguration sequences.	Use Scenario: Replacing obsolete 74F374 in aging industrial controllers where board space and pinout are fixed but noise immunity must improve. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement with identical SOIC-20 footprint and function, adding on-die termination and I_off. Use Value: Eliminates need for 8 external 33-Ω series resistors and enables safe hot-swap maintenance without system shutdown.

Industrial Backplane Bus

Test Equipment Data Capture

Use Scenario: Synchronizing parallel sensor data from multiple modules onto a shared 8-bit data bus in programmable logic controllers.

IC Role / Device Role / Timing Role: Octal register capturing analog-to-digital converter outputs on rising clock edge, then presenting stable values to bus transceivers under OE control.

Use Value: On-die 25-Ω termination ensures clean signal edges across 20-cm backplane traces, eliminating reflection-induced sampling errors at 25 MHz bus rates.

Use Scenario: Capturing real-time waveform samples from high-speed ADCs in automated test equipment before buffering to memory.

IC Role / Device Role / Timing Role: Edge-triggered latch holding 8-bit sample words synchronized to system clock, with OE enabling burst-mode transfer to FIFO controllers.

Use Value: Matched rise/fall times and 12 mA drive capability maintain timing margins across temperature, supporting ±0.5 ns jitter tolerance in 100 MS/s capture systems.

Programmable Logic Interface

Legacy System Upgrade

Use Scenario: Interfacing FPGA I/O banks to legacy 5-V peripheral buses requiring precise setup/hold timing and bus contention control.

IC Role / Device Role / Timing Role: Registered buffer isolating FPGA core logic from 5-V bus voltage and providing deterministic 3-state control during configuration cycles.

Use Value: I_off protection allows FPGA reconfiguration while peripherals remain powered, preventing latch-up during partial reconfiguration sequences.

Use Scenario: Replacing obsolete 74F374 in aging industrial controllers where board space and pinout are fixed but noise immunity must improve.

IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement with identical SOIC-20 footprint and function, adding on-die termination and I_off.

Use Value: Eliminates need for 8 external 33-Ω series resistors and enables safe hot-swap maintenance without system shutdown.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74FCT374NSR	Same FCT family, identical pinout and function, but rated for 6.5 ns max t_P (vs. 10 ns for CY74FCT2374TSOCTE4); higher speed grade	Preferred where <15 ns total bus cycle time is required; not suitable if existing design relies on CY74FCT2374T's slower edge rate for EMI control	Select SN74FCT374NSR only if timing budget demands sub-10 ns propagation and board layout supports faster edges.
74ACT374SCX	ACT family (higher drive: 24 mA sink), no built-in 25-Ω termination, no I_off, V_OH ≈ 4.5 V (not reduced)	Requires external series resistors for reflection control; lacks partial-power-down safety; incompatible with mixed-rail hot-swap scenarios	Choose 74ACT374SCX only for pure 5-V systems with tight drive requirements and no power sequencing constraints.

Compared with SN74FCT374NSR and 74ACT374SCX, the CY74FCT2374TSOCTE4 uniquely combines on-die 25-Ω termination, I_off protection, and reduced V_OH in a pin-compatible SOIC-20 package-making it optimal for noise-sensitive industrial upgrades where layout changes are prohibited and power sequencing is non-trivial.

Availability

CY74FCT2374TSOCTE4 is available at Aetrix Electronics and suitable for industrial automation backplanes, test equipment data capture subsystems, and legacy system upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for CY74FCT2374TSOCTE4 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 CY74FCT2374TSOCTE4 belongs to TI's FCT logic family, engineered specifically for noise-immune, bus-oriented digital systems operating in harsh industrial environments with strict power sequencing and EMI requirements.

FAQ

What is the maximum clock frequency supported by CY74FCT2374TSOCTE4?

The CY74FCT2374TSOCTE4 supports typical switching up to 250 MHz, with guaranteed timing performance up to 100 MHz based on its 10 ns maximum propagation delay (t_PLH/t_PHL) and 2 ns minimum pulse width (t_w). For reliable operation at 100 MHz, ensure setup time (2 ns) and hold time (1.5 ns) are met with controlled clock skew and proper PCB routing. The CY74FCT2374TSOCTE4 is not characterized for continuous operation above 100 MHz in standard industrial conditions.

Does CY74FCT2374TSOCTE4 require external pull-up or pull-down resistors on unused inputs?

Yes - per TI's recommended operating conditions, all unused inputs of the CY74FCT2374TSOCTE4 must be held at either V_CC or GND to prevent floating nodes that could cause excessive ICC current, erratic output behavior, or increased EMI. This applies to unused D inputs, CP, and OE. The CY74FCT2374TSOCTE4 does not include internal weak pull-ups or pull-downs, so external biasing is mandatory for robust operation.

Can CY74FCT2374TSOCTE4 be used in mixed-voltage systems with 3.3-V controllers?

Yes - the CY74FCT2374TSOCTE4 accepts TTL-level inputs (V_IH ≥ 2.0 V, V_IL ≤ 0.8 V), making it compatible with 3.3-V microcontrollers and FPGAs driving 5-V-tolerant I/O. Its reduced V_OH (typically 3.3 V) also provides safe interfacing with 3.3-V receivers. However, V_CC must remain at 5 V; the CY74FCT2374TSOCTE4 is not specified for 3.3-V supply operation.

What is the purpose of the 25-Ω output series resistance in CY74FCT2374TSOCTE4?

The 25-Ω output series resistance in the CY74FCT2374TSOCTE4 is integrated on-die to dampen transmission-line reflections on PCB traces and cables, reducing ringing, overshoot, and EMI without requiring external discrete resistors. It is optimized for 50-Ω trace impedance environments and directly improves signal integrity in high-speed parallel bus applications such as industrial backplanes and data acquisition systems using the CY74FCT2374TSOCTE4.

Is CY74FCT2374TSOCTE4 pin-compatible with older 74F374 or 74LS374 devices?

Yes - the CY74FCT2374TSOCTE4 is explicitly designed as functionally and pinout-compatible with industry-standard 74F374 and 74LS374 octal D-type registers in SOIC-20 packages. It retains identical pin assignments for D0–D7, O0–O7, CP, OE, V_CC, and GND. This allows direct replacement in legacy designs, with added benefits including on-die termination, I_off, and improved noise characteristics - all without PCB layout changes.

CY74FCT2374TSOCTE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74FCT

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

Packaging:: Tape & Reel (TR)

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:: 10ns @ 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

CY74FCT2374TSOCTE4 FAQ

1.How can I place an order for CY74FCT2374TSOCTE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CY74FCT2374TSOCTE4 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 CY74FCT2374TSOCTE4 reliable?

The price and inventory of CY74FCT2374TSOCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2374TSOCTE4 is usually 5 days.

3.What payment methods are accepted for CY74FCT2374TSOCTE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2374TSOCTE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY74FCT2374TSOCTE4?

CY74FCT2374TSOCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY74FCT2374TSOCTE4 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 CY74FCT2374TSOCTE4?

For technical support, including CY74FCT2374TSOCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2374TSOCTE4 requirements.

6.How does Aetrix verify that CY74FCT2374TSOCTE4 is sourced from the original manufacturer or authorized distributors?

All CY74FCT2374TSOCTE4 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 CY74FCT2374TSOCTE4 meets industry standards.

7.What is the process for return or replacement of CY74FCT2374TSOCTE4?

All CY74FCT2374TSOCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2374TSOCTE4, 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 CY74FCT2374TSOCTE4 part is unused and in its original packaging.

Return procedure for CY74FCT2374TSOCTE4:

1.Submit a request within 90 days.

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

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