Texas Instruments CY74FCT374CTSOCTG4

Overview

CY74FCT374CTSOCTG4 from Texas Instruments is an 8-bit edge-triggered D-type flip-flop IC with 3-state outputs, designed for bus-oriented digital systems. It features a buffered clock (CP), common output-enable (OE), 5.2 ns maximum propagation delay, ±64 mA sink/source drive strength, and Ioff support for partial-power-down mode. It operates at 4.75–5.25 V and is used in data latching, address/data bus buffering, and synchronous interface logic.

For engineers reviewing the CY74FCT374CTSOCTG4 datasheet, CY74FCT374CTSOCTG4 pinout, CY74FCT374CTSOCTG4 application, or CY74FCT374CTSOCTG4 equivalent, key selection criteria include 3-state bus compatibility, TTL-level input/output interoperability, 5.2 ns tPLH/tPHL timing, Ioff-enabled power-down safety, and SOIC-20 package thermal performance (θJA = 58°C/W).

Technical Context

The CY74FCT374CTSOCTG4 implements eight independent D-type flip-flops sharing a single positive-edge-triggered clock (CP) and a common active-low output-enable (OE). Its output stage uses totem-pole drivers with 3-state control, enabling bidirectional bus arbitration without external isolation.

It integrates edge-rate control circuitry to reduce switching noise and features matched rise/fall times, JESD22-compliant ESD protection (2000-V HBM), and Ioff circuitry that disables outputs when VCC = 0 V-preventing back-current during partial power-down sequences in mixed-supply systems.

Key Specifications

Pinout & Package

CY74FCT374CTSOCTG4 is housed in a 20-pin SOIC (DW) package with 0.300-inch body width, gull-wing leads, and RoHS-compliant NiPdAu lead finish. Thermal resistance θJA is 58°C/W, supporting continuous operation at up to 85°C ambient with standard PCB copper area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit registered buffer applications.

Compared with SN74FCT374ATSOCT and 74ACT374SCX, CY74FCT374CTSOCTG4 delivers the fastest timing (5.2 ns), guaranteed Ioff behavior, and superior ESD robustness-making it optimal for high-reliability, bus-shared, and power-gated applications where deterministic latency and fault-safe shutdown are critical.

Availability

CY74FCT374CTSOCTG4 is available at Aetrix Electronics and suitable for industrial automation, automotive diagnostics, and test equipment design requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY74FCT374CTSOCTG4 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 decades of heritage in high-reliability logic families including FCT, ACT, and LVC.

CY74FCT374CTSOCTG4 belongs to the TI FCT logic series-engineered for high-speed, low-noise, bus-oriented digital systems requiring TTL compatibility, 3-state control, and robust power-down behavior.

FAQ

What is the maximum clock frequency supported by CY74FCT374CTSOCTG4?

CY74FCT374CTSOCTG4 has a typical switching rate of 250 MHz and a maximum propagation delay of 5.2 ns, supporting reliable operation up to 192 MHz in worst-case timing analysis (1/5.2 ns ≈ 192 MHz). This assumes proper layout, decoupling, and load conditions per the datasheet's 50 pF test setup.

Does CY74FCT374CTSOCTG4 support partial power-down, and how does it work?

Yes, CY74FCT374CTSOCTG4 supports partial power-down via its Ioff feature. When VCC = 0 V, the Ioff circuitry disables all outputs, limiting leakage to ±1 µA even if bus signals remain active at up to 4.5 V-preventing damaging back-current into unpowered sections of the system.

What is the output drive capability of CY74FCT374CTSOCTG4, and how does it compare to standard TTL?

CY74FCT374CTSOCTG4 provides 64 mA sink and 32 mA source current per output-more than double standard TTL (16 mA sink/0.4 mA source). This enables direct driving of multiple TTL inputs, termination resistors, or moderate capacitive loads without external buffers.

Is CY74FCT374CTSOCTG4 pin-compatible with other FCT-series octal registers?

Yes, CY74FCT374CTSOCTG4 shares identical pinout, function, and drive characteristics with CY74FCT374T, CY74FCT374A, and SN74FCT374x variants in SOIC-20 packaging. Differences are limited to speed grade (5.2 ns vs. 6.5 ns vs. 10 ns) and operating voltage tolerances-not pin assignment or logic behavior.

What package type and RoHS status does CY74FCT374CTSOCTG4 use?

CY74FCT374CTSOCTG4 is supplied in a RoHS-compliant SOIC-20 (DW) package with NiPdAu lead finish, tape-and-reel packaging (2000 units/reel), and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH). The package drawing code is DW, per TI's official package documentation.