Texas Instruments CY74FCT2374TSOCG4

Overview

CY74FCT2374TSOCG4 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, I_off partial-power-down support, matched rise/fall times, and TTL-compatible logic levels. Typical propagation delay is 10 ns at 5 V, with 12 mA sink / 15 mA source drive capability.

For engineers reviewing the CY74FCT2374TSOCG4 datasheet, CY74FCT2374TSOCG4 pinout, CY74FCT2374TSOCG4 application, or CY74FCT2374TSOCG4 equivalent, key selection criteria include 3-state bus interface timing (t_PLH/t_PHL ≤10 ns), I_off-enabled power sequencing, and 25-Ω on-die termination for reflection noise suppression in high-speed digital systems.

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 stores its respective D-input state meeting 2 ns setup and 1.5 ns hold time requirements. Output-enable (OE) controls all eight 3-state outputs simultaneously without affecting internal register states.

Edge-rate control circuitry ensures matched t_r/t_f, while integrated 25-Ω series resistors at each output reduce transmission-line reflections. The I_off feature disables outputs when V_CC = 0 V, preventing backflow current during partial power-down - critical for hot-swap and multi-rail system designs.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW package drawing), 7.6 mm × 12.8 mm body, 2.65 mm max height, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal D-type register applications.

Compared with SN74FCT374NSR, CY74FCT2374TSOCG4 offers identical functionality but is optimized for industrial temperature range (–40°C to 85°C) and shipped in tube packaging; versus 74ACT374SCX, it provides superior noise immunity via on-die termination and essential I_off for modern multi-rail systems.

Availability

CY74FCT2374TSOCG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ECU data latching, test equipment pattern generation, and legacy system logic emulation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY74FCT2374TSOCG4 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.

CY74FCT2374TSOCG4 belongs to the FCT logic family - engineered for high-speed, low-noise 5 V digital interfacing with emphasis on bus termination, power sequencing, and system-level ESD robustness.

FAQ

What is the maximum clock frequency supported by CY74FCT2374TSOCG4?

CY74FCT2374TSOCG4 supports a typical switching rate of 250 MHz, with guaranteed operation up to 100 MHz based on its 10 ns maximum propagation delay (t_PLH/t_PHL) and 2 ns setup/1.5 ns hold timing requirements. Actual usable frequency depends on PCB layout, load capacitance, and supply stability - design validation at target clock rates is recommended using the specified 50 pF load condition.

Does CY74FCT2374TSOCG4 support hot-swap or partial-power-down operation?

Yes, CY74FCT2374TSOCG4 includes I_off circuitry that disables outputs when V_CC = 0 V, limiting reverse current to ±1 µA. This enables safe insertion/removal in live backplanes and interoperability with unpowered subsystems - a key requirement for industrial and telecom infrastructure where power domains sequence independently.

How does the 25-Ω output series resistance in CY74FCT2374TSOCG4 improve signal integrity?

The 25-Ω on-die series resistor in CY74FCT2374TSOCG4 matches typical PCB trace impedance (50–75 Ω) in source-series termination configurations. This damps reflections caused by impedance mismatches at connectors or stubs, reducing overshoot, undershoot, and ringing - particularly beneficial for 10+ cm traces operating above 25 MHz without requiring external discrete resistors.

Is CY74FCT2374TSOCG4 pin-compatible with older 74LS374 devices?

CY74FCT2374TSOCG4 is functionally and pin-compatible with 74LS374, sharing identical SOIC-20 pinout, D-type register behavior, and 3-state output control. However, it operates at lower VOL (0.55 V max vs. 0.5 V typ for LS), higher VOH (3.3 V typ), and includes I_off and on-die termination - making it a direct drop-in upgrade for noise-sensitive or power-sequenced systems.

What are the absolute maximum ratings for CY74FCT2374TSOCG4 supply voltage and operating temperature?

CY74FCT2374TSOCG4 has an absolute maximum supply voltage of –0.5 V to 7 V and an absolute maximum ambient operating temperature of –65°C to 135°C. Its recommended operating range is V_CC = 4.75–5.25 V and T_A = –40°C to 85°C - validated for industrial applications with margin against transient overvoltage and thermal stress.