Texas Instruments CY74FCT2374TSOCT

Overview

CY74FCT2374TSOCT 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, I_off support for partial-power-down mode, and operates at 5 V with TTL-compatible logic levels. It is used in synchronous data latching and bus isolation in industrial control backplanes.

For engineers reviewing the CY74FCT2374TSOCT datasheet, CY74FCT2374TSOCT pinout, CY74FCT2374TSOCT application, or CY74FCT2374TSOCT equivalent, this page delivers verified electrical parameters, SOIC-20 package details, timing behavior under –40°C to 85°C, and real-world substitution guidance for legacy FCT register designs.

Technical Context

The CY74FCT2374TSOCT 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 of 2 ns and hold time of 1.5 ns at V_CC = 5 V.

Its 3-state outputs are controlled solely by OE: outputs go high-impedance when OE is high, regardless of CP or D states. The device integrates 25-Ω series termination resistors per output to suppress transmission-line reflections, and supports I_off protection (±1 µA leakage at V_CC = 0 V) for safe partial power-down operation.

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, CY74FCT2374TSOCT adds integrated termination and I_off for robustness in dynamic systems; compared with CY74FCT2374ATSOCT, it trades 1.3 ns slower propagation for broader availability and cost efficiency in non-critical timing applications.

Availability

CY74FCT2374TSOCT is available at Aetrix Electronics and suitable for industrial automation backplanes, test equipment data capture subsystems, and legacy logic upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY74FCT2374TSOCT 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 50 years of innovation in high-reliability industrial and automotive ICs.

The CY74FCT2374TSOCT belongs to TI's FCT logic family, engineered specifically for noise-sensitive 5 V digital systems requiring fast, low-glitch bus interfacing with robust ESD and power-down safety.

FAQ

What is the maximum clock frequency supported by CY74FCT2374TSOCT?

CY74FCT2374TSOCT supports a typical switching rate of 250 MHz, with guaranteed timing up to 100 MHz based on its 10 ns max propagation delay and 2 ns setup/hold window. For sustained 250 MHz operation, ensure PCB layout minimizes trace inductance and uses proper 50 pF load conditions per output as specified in the TI datasheet SCCS040A.

Does CY74FCT2374TSOCT require external pull-up or pull-down resistors on unused inputs?

Yes - per TI's recommended operating conditions, all unused inputs of CY74FCT2374TSOCT must be held at V_CC or GND to prevent floating nodes that could cause excessive ICC current or metastability. OE and CP are especially sensitive; leaving them unconnected risks undefined output states and increased power consumption.

Can CY74FCT2374TSOCT be used with 3.3 V logic systems?

CY74FCT2374TSOCT is a 5 V-only device (V_CC = 4.75–5.25 V) and does not tolerate 3.3 V supply. However, its TTL-compatible inputs accept 3.3 V logic highs (V_IH = 2.0 V min), so it can receive signals from 3.3 V drivers. Outputs swing to ~3.3 V (typ.) and may require level translation to interface safely with 3.3 V receivers.

How does the I_off feature protect CY74FCT2374TSOCT during partial power-down?

When V_CC = 0 V, CY74FCT2374TSOCT's I_off circuitry limits current flow through powered-down I/O pins to ±1 µA, preventing damaging backflow from live bus lines into the unpowered IC. This allows safe insertion/removal in hot-swap backplanes and enables selective subsystem shutdown without isolating signal paths externally.

Is CY74FCT2374TSOCT pin-compatible with CY74FCT374TSOCT?

Yes - CY74FCT2374TSOCT is explicitly documented as function- and pin-compatible with CY74FCT374T-series devices. Both share identical SOIC-20 pinout, D/Q mapping, CP/OE placement, and functional truth table. The key enhancements in CY74FCT2374TSOCT - including 25-Ω series resistors and improved noise characteristics - are implemented internally without altering pin assignments or timing conventions.