Texas Instruments CY74FCT2374TSOCTG4

Overview

CY74FCT2374TSOCTG4 from Texas Instruments is an octal edge-triggered D-type flip-flop 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, Ioff partial-power-down support, and operates at 5 V with TTL-compatible logic levels. It is used in synchronous data latching and bus buffering in industrial control backplanes.

For engineers reviewing the CY74FCT2374TSOCTG4 datasheet, CY74FCT2374TSOCTG4 pinout, CY74FCT2374TSOCTG4 application, or CY74FCT2374TSOCTG4 equivalent, key selection criteria include propagation delay (max 10 ns), 3-state enable timing (tPZH/tPLZ ≤ 8 ns), Ioff leakage (< ±1 µA at VCC = 0 V), and SOIC-20 package compatibility with legacy FCT logic designs.

Technical Context

The CY74FCT2374TSOCTG4 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 (2 ns) and hold time (1.5 ns) specified at 5 V.

Its 3-state outputs are controlled solely by OE - low enables outputs (Q = D after clock), high forces high-impedance regardless of clock or data state. Edge-rate control circuitry and integrated 25-Ω series termination reduce transmission-line reflections and improve noise immunity without external components.

Key Specifications

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, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74FCT374NSR and 74AC374SCX, the CY74FCT2374TSOCTG4 uniquely combines Ioff protection, on-die 25-Ω termination, and JEDEC-qualified ESD robustness - making it the sole option for industrial backplanes requiring both reliability and drop-in FCT compatibility.

Availability

CY74FCT2374TSOCTG4 is available at Aetrix Electronics and suitable for industrial automation backplanes, automated test equipment (ATE) pattern storage, and legacy system logic upgrades requiring stable component supply and long-term lifecycle assurance.

Supply support for CY74FCT2374TSOCTG4 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 specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications electronics.

The CY74FCT2374TSOCTG4 belongs to TI's FCT logic family - engineered for high-speed, low-noise 5-V bus interfacing in mission-critical industrial and telecom infrastructure where reliability, timing precision, and legacy compatibility are mandatory.

FAQ

What is the maximum clock frequency supported by the CY74FCT2374TSOCTG4?

The CY74FCT2374TSOCTG4 supports a typical switching rate of 250 MHz, with guaranteed timing up to 100 MHz based on its 10 ns maximum propagation delay (tPLH/tPHL) and 2 ns minimum pulse width (tw). For reliable operation across temperature and voltage, design margins should limit sustained clock rates to ≤80 MHz in worst-case conditions.

Does the CY74FCT2374TSOCTG4 require external pull-up or pull-down resistors on unused inputs?

Yes - per TI's recommended operating conditions, all unused inputs of the CY74FCT2374TSOCTG4 must be held at either VCC or GND to prevent floating states that could increase ICC, induce oscillation, or degrade noise immunity. This applies to unused D inputs, CP, and OE pins; tying to VCC via 10-kΩ resistors is acceptable for OE if active-low assertion is not required.

Can the CY74FCT2374TSOCTG4 operate at 3.3 V?

No - the CY74FCT2374TSOCTG4 is strictly a 5-V device with a recommended supply range of 4.75 V to 5.25 V. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V) and output drive characteristics are optimized for 5-V TTL compatibility. Operation below 4.75 V violates datasheet specifications and risks timing failure or increased static current.

What does "Ioff support" mean for the CY74FCT2374TSOCTG4, and how is it implemented?

Ioff support in the CY74FCT2374TSOCTG4 refers to its ability to disable output drivers when VCC = 0 V, limiting reverse current flow to ±1 µA even with up to 4.5 V applied at outputs. This is achieved via internal circuitry that isolates the output transistors from the powered-down core, enabling safe use in partial-power-down systems like hot-pluggable backplanes without external isolation components.

Is the CY74FCT2374TSOCTG4 pin-compatible with the CY74FCT374T series?

Yes - the CY74FCT2374TSOCTG4 is functionally and physically pin-compatible with the CY74FCT374T series (e.g., CY74FCT374TSOCT), sharing identical SOIC-20 pinout, logic behavior, and DC/AC specifications. Key enhancements in the CY74FCT2374TSOCTG4 - including Ioff, edge-rate control, and 25-Ω series resistors - are implemented internally without altering pin assignments or timing interface requirements.