Texas Instruments CY74FCT2374TSOC

Overview

CY74FCT2374TSOC 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 25-Ω output series resistors, 12-mA sink / 15-mA source drive, I_off support for partial-power-down, and 10 ns max propagation delay (t_PLH/t_PHL) at 5 V. Used in industrial control backplanes and memory address latching.

For engineers reviewing the CY74FCT2374TSOC datasheet, CY74FCT2374TSOC pinout, CY74FCT2374TSOC application, or CY74FCT2374TSOC equivalent, key selection criteria include 3-state bus contention management, TTL-compatible input thresholds, 250-MHz switching capability, I_off protection during power sequencing, and SOIC-20 package thermal performance (θ_JA = 58°C/W).

Technical Context

This device implements eight independent D-type latches synchronized to the low-to-high transition of a common buffered clock (CP) input. Each flip-flop samples its dedicated D-input under setup/hold timing constraints (t_su = 2 ns, t_h = 1.5 ns), storing state until the next active clock edge.

Output-enable (OE) controls all eight outputs simultaneously: OE = L enables data transfer to O0–O7; OE = H places outputs in high-impedance state without affecting internal register contents. Edge-rate control circuitry and on-die 25-Ω series termination reduce transmission-line reflections and improve noise immunity.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW), 7.6 mm × 12.6 mm body, 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 SN74FCT2374TSO, CY74FCT2374TSOC offers identical functionality with updated marking and packaging logistics; versus 74ACT273SOIC, it provides critical bus-isolation features (3-state, I_off, integrated termination) essential for modern industrial backplane designs.

Availability

CY74FCT2374TSOC is available at Aetrix Electronics and suitable for industrial automation backplanes, memory subsystem latching, and hot-swappable I/O module control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY74FCT2374TSOC 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 for industrial, automotive, and communications markets.

The CY74FCT2374TSOC belongs to TI's FCT logic family, engineered for high-speed, low-noise 5-V digital interfacing with emphasis on bus integrity, power sequencing robustness, and system-level EMI reduction.

FAQ

What is the maximum clock frequency supported by CY74FCT2374TSOC?

CY74FCT2374TSOC supports a typical switching rate of 250 MHz, validated by its 10 ns maximum propagation delay (t_PLH/t_PHL) and 2 ns minimum pulse width (t_w) at V_CC = 5 V. This enables reliable operation in 100-MHz synchronous bus systems with adequate timing margin.

Does CY74FCT2374TSOC support partial power-down operation?

Yes, CY74FCT2374TSOC includes I_off circuitry that disables outputs and limits reverse current to ±1 µA when V_CC = 0 V. This allows safe integration into systems with staggered power-rail sequencing, such as hot-pluggable modules or multi-voltage industrial controllers.

What is the purpose of the 25-Ω output series resistance in CY74FCT2374TSOC?

The 25-Ω output series resistance in CY74FCT2374TSOC is integrated to dampen transmission-line reflections on PCB traces, reducing ringing and overshoot. It eliminates the need for discrete series resistors in point-to-point or short-bus configurations up to ~15 cm, improving signal integrity without increasing BOM count.

Can CY74FCT2374TSOC directly interface with standard TTL logic?

Yes, CY74FCT2374TSOC is fully compatible with TTL input and output logic levels: V_IH = 2 V min and V_IL = 0.8 V max meet TTL thresholds, and its VOH ≈ 3.3 V (typical) and VOL ≤ 0.55 V ensure valid logic recognition by downstream TTL devices without level shifters.

What package type and dimensions does CY74FCT2374TSOC use?

CY74FCT2374TSOC uses a SOIC-20 (DW) package: 7.6 mm × 12.6 mm body size, 2.65 mm maximum height, 1.27 mm lead pitch, and RoHS-compliant NiPdAu finish. Its θ_JA = 58°C/W supports operation in industrial ambient temperatures up to +85°C with standard PCB copper area.