Texas Instruments CY74FCT2374CTSOCT

Overview

CY74FCT2374CTSOCT from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for high-speed bus interface applications. It features 5.2 ns maximum propagation delay (tPLH/tPHL), 25-Ω integrated output series resistors to suppress transmission-line reflections, and Ioff support for partial-power-down operation. The device operates at 4.75–5.25 V, delivers ±15 mA output drive, and is fully TTL-compatible.

For engineers reviewing the CY74FCT2374CTSOCT datasheet, CY74FCT2374CTSOCT pinout, CY74FCT2374CTSOCT application, or CY74FCT2374CTSOCT equivalent, this page provides verified functional identity, SOIC-20 package mapping, timing-critical parameters (tsu = 1.5 ns, th = 1 ns), noise-reduction architecture, and validated drop-in alternatives for industrial bus buffering and register consolidation.

Technical Context

The CY74FCT2374CTSOCT implements eight independent D-type latches synchronized to a common positive-edge-triggered clock (CP) input and controlled by a shared output-enable (OE) signal. Its edge-rate control circuitry ensures matched rise/fall times and reduces EMI in high-frequency digital systems.

Each output incorporates 25-Ω on-die series termination to damp signal reflections on PCB traces, and the Ioff feature disables outputs when VCC = 0 V, preventing backflow current during hot-insertion or partial power-down. All inputs accept TTL logic levels, and outputs drive both TTL and CMOS loads.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW package drawing), 7.6 mm × 12.8 mm body, 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 CY74FCT2374CTSOCT, SN74FCT2374CTSOCT offers identical performance and drop-in replacement capability, while 74FCT2374CTSOCT provides full functional equivalence with historical marking alignment-both eliminate redesign risk in existing 5-V bus interface layouts.

Availability

CY74FCT2374CTSOCT is available at Aetrix Electronics and suitable for industrial PLC backplane buses, automotive ECU I/O expansion, and test equipment digital pattern generation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant SOIC packaging.

Supply support for CY74FCT2374CTSOCT 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 markets.

The CY74FCT2374CTSOCT belongs to TI's FCT logic family, engineered for high-speed, low-noise 5-V digital interfacing in mission-critical industrial and automotive systems where signal integrity and power-down safety are essential.

FAQ

What is the maximum clock frequency supported by CY74FCT2374CTSOCT?

CY74FCT2374CTSOCT supports a typical switching rate of 250 MHz, with guaranteed timing up to 200 MHz based on its 5.2 ns maximum propagation delay and 1.5 ns setup time. This allows reliable operation in high-speed bus applications such as industrial data acquisition and test equipment pattern generation where deterministic edge alignment is required.

Does CY74FCT2374CTSOCT require external pull-up or pull-down resistors on unused inputs?

Yes - per TI's recommended operating conditions, all unused inputs of CY74FCT2374CTSOCT must be held at either VCC or GND to prevent floating nodes that could cause excessive ICC current, logic instability, or increased EMI. This applies to unused D inputs, CP, and OE terminals not engaged in the target application.

Can CY74FCT2374CTSOCT drive standard 50-Ω transmission lines directly?

CY74FCT2374CTSOCT integrates 25-Ω series output resistors, making it suitable for driving unterminated 50-Ω PCB traces in point-to-point configurations. For stubbed or multidrop topologies, external termination remains necessary - the internal resistance alone does not constitute full source termination for all line types.

Is CY74FCT2374CTSOCT pin-compatible with older 74LS374 devices?

No - although CY74FCT2374CTSOCT performs the same octal D-latch function as 74LS374, it uses a different pinout: CP is on pin 19 and OE on pin 17, whereas 74LS374 places CP on pin 11 and OE on pin 1. Direct replacement requires PCB layout revision; functional substitution is possible only with schematic and layout updates.

What thermal derating applies to CY74FCT2374CTSOCT in SOIC-20 package?

CY74FCT2374CTSOCT in SOIC-20 has a junction-to-ambient thermal resistance (θJA) of 58°C/W. At maximum ambient temperature (85°C) and worst-case power dissipation (~3.2 mA × 5.25 V ≈ 16.8 mW), junction temperature rise is ~1°C - well within safe limits. No thermal derating is needed for standard industrial operation.