Texas Instruments CY74FCT2374ATSOCE4

Overview

CY74FCT2374ATSOCE4 from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with 3-state outputs, designed for high-speed bus-oriented 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 15 mA source and 12 mA sink drive capability.

For engineers reviewing the CY74FCT2374ATSOCE4 datasheet, CY74FCT2374ATSOCE4 pinout, CY74FCT2374ATSOCE4 application, or CY74FCT2374ATSOCE4 equivalent, this device is selected for noise-sensitive digital systems requiring deterministic timing, bus isolation, and legacy TTL interoperability in industrial control and data acquisition interfaces.

Technical Context

The CY74FCT2374ATSOCE4 implements eight independent D-type flip-flops sharing a common buffered clock (CP) and active-low output-enable (OE) control. Each flip-flop latches its D-input on the low-to-high transition of CP, with setup time of 1.5 ns and hold time of 1 ns at V_CC = 5 V.

Its 3-state outputs are driven by totem-pole buffers with integrated 25-Ω series termination, reducing transmission-line reflections. The I_off circuitry ensures <±1 µA leakage when V_CC = 0 V, enabling safe back-drive protection during partial power-down.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW), 7.6 mm × 12.8 mm body, 2.65 mm max height, 1.27 mm pitch, 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 SN74FCT2374ATSO, CY74FCT2374ATSOCE4 offers identical performance but with enhanced manufacturing traceability (E4 suffix); versus 74ACT273SCX, it provides essential bus-driving features-3-state control and I_off-that eliminate external components and enable safer system-level power sequencing.

Availability

CY74FCT2374ATSOCE4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, data acquisition input latching, legacy test equipment upgrades, automated manufacturing fixtures, and embedded control subsystems requiring stable component supply across extended product lifecycles.

Supply support for CY74FCT2374ATSOCE4 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 CY74FCT2374ATSOCE4 belongs to TI's FCT logic family, engineered for noise-immune, high-speed digital interfacing in industrial control and instrumentation systems where reliability under EMI stress and mixed-supply operation are critical.

FAQ

What is the maximum clock frequency supported by CY74FCT2374ATSOCE4?

CY74FCT2374ATSOCE4 supports a typical maximum switching rate of 250 MHz, derived from its 6.5 ns maximum propagation delay and 1.5 ns minimum pulse width. At 5 V supply and 25°C, it reliably operates in synchronous systems up to 150 MHz with full timing margin, as confirmed by TI's characterization data across –40°C to +85°C.

Does CY74FCT2374ATSOCE4 require external pull-up or pull-down resistors on its inputs?

No, CY74FCT2374ATSOCE4 does not require external pull-up or pull-down resistors on its inputs. Its TTL-compatible input thresholds (V_IH = 2.0 V, V_IL = 0.8 V) and low input leakage (<±1 µA) allow direct connection to CMOS or TTL sources. TI's datasheet explicitly states that unused inputs must be tied to V_CC or GND-but only to ensure deterministic logic states, not due to weak internal biasing.

How does the I_off feature of CY74FCT2374ATSOCE4 protect the system during partial power-down?

The I_off feature in CY74FCT2374ATSOCE4 disables all outputs and limits leakage current to ±1 µA when V_CC = 0 V, preventing reverse current flow from powered downstream buses into the unpowered IC. This eliminates latch-up risk and protects both CY74FCT2374ATSOCE4 and connected devices during hot-swap or staggered power sequencing in multi-rail industrial systems.

Can CY74FCT2374ATSOCE4 replace CY74FCT374T in an existing design?

Yes, CY74FCT2374ATSOCE4 can replace CY74FCT374T in most cases: both are 8-bit D-type registers with identical pinout, 3-state outputs, and FCT-family compatibility. However, CY74FCT2374ATSOCE4 adds 25-Ω output series resistors and improved noise characteristics, making it a functional upgrade-not just a drop-in-with no PCB changes required.

What is the meaning of the "E4" suffix in CY74FCT2374ATSOCE4?

The "E4" suffix in CY74FCT2374ATSOCE4 denotes a specific assembly and test lot code per TI's internal marking convention, indicating compliance with RoHS and green packaging standards (no Sb/Br), NIPDAU lead finish, and MSL Level-1 handling. It does not alter electrical specifications but ensures traceability and environmental conformance for industrial procurement requirements.