Texas Instruments CY74FCT2374ATSOCT

Overview

CY74FCT2374ATSOCT from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with 3-state outputs, designed for high-speed bus interface applications. It features 25-Ω output series resistors, I_off partial-power-down support, matched rise/fall times, and TTL-compatible input/output logic levels. Typical propagation delay is 6.5 ns at 5 V, with 12 mA sink and 15 mA source drive capability.

For engineers reviewing the CY74FCT2374ATSOCT datasheet, CY74FCT2374ATSOCT pinout, CY74FCT2374ATSOCT application, or CY74FCT2374ATSOCT equivalent, key selection criteria include 3-state bus driving capability, 25-Ω on-die termination for reflection suppression, I_off protection in partial-power-down systems, and guaranteed timing performance across –40°C to +85°C.

Technical Context

This device implements eight independent D-type flip-flops sharing a common buffered clock (CP) and output-enable (OE) control. Data is latched on the low-to-high transition of CP, with setup time of 2 ns and hold time of 1.5 ns under recommended operating conditions.

Each output includes integrated 25-Ω series resistance to damp transmission-line reflections, and supports high-impedance state when OE is high. The I_off circuitry actively disables outputs when V_CC = 0 V, preventing backflow current during partial power-down sequences.

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 lead 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 SN74FCT374ATSOCT, CY74FCT2374ATSOCT offers identical functionality and timing but originates from TI's CY (Cypress) acquisition lineage; versus 74ACT374SCX, it trades raw speed for integrated signal integrity features and robustness in industrial power environments.

Availability

CY74FCT2374ATSOCT is available at Aetrix Electronics and suitable for industrial control systems, legacy bus interface designs, and high-reliability embedded data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY74FCT2374ATSOCT 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.

CY74FCT2374ATSOCT belongs to TI's FCT logic family, engineered for high-speed, low-noise 5-V bus interfacing with emphasis on signal integrity, power-down safety, and backward compatibility with legacy TTL systems.

FAQ

What is the maximum clock frequency supported by CY74FCT2374ATSOCT?

CY74FCT2374ATSOCT is characterized for reliable operation up to 250 MHz typical switching rate, with guaranteed timing parameters specified down to 6.5 ns propagation delay (t_PLH/t_PHL) at V_CC = 5 V and T_A = 25°C. For worst-case design, use the 6.5 ns max value across –40°C to +85°C to ensure setup/hold compliance in synchronous systems.

Does CY74FCT2374ATSOCT require external pull-up or pull-down resistors on unused inputs?

Yes - per TI's recommended operating conditions, all unused inputs of CY74FCT2374ATSOCT must be held at either V_CC or GND to prevent floating states that could increase ICC, cause erratic behavior, or degrade noise immunity. This applies to all D inputs, CP, and OE pins not actively driven in the application.

Can CY74FCT2374ATSOCT be used in mixed-voltage systems where V_CC = 3.3 V?

No - CY74FCT2374ATSOCT is specified only for V_CC = 4.75 V to 5.25 V. Operation at 3.3 V falls outside recommended conditions and violates absolute maximum ratings for input voltage range (–0.5 V to 7 V) and output drive capability. Use 3.3-V-compatible alternatives like SN74LVC823APWR for such systems.

How does the I_off feature of CY74FCT2374ATSOCT protect the system during partial power-down?

The I_off circuitry in CY74FCT2374ATSOCT disables all outputs when V_CC = 0 V, limiting leakage current to ±1 µA even if other system rails (e.g., 3.3 V or 12 V) remain active and drive signals onto the device's I/O pins. This prevents destructive backflow current through the silicon, enabling safe hot-swap and staged power sequencing in modular electronics.

Is CY74FCT2374ATSOCT pin-compatible with older 74FCT374 devices?

Yes - CY74FCT2374ATSOCT is explicitly documented as functionally and pinout-compatible with both FCT and F logic families, including SN74FCT374T. The pin assignments, electrical characteristics, and timing behavior match across these variants, allowing direct substitution in existing SOIC-20 layouts without PCB modification.