Texas Instruments CY74FCT2374CTSOC

Overview

CY74FCT2374CTSOC 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 5.2 ns typical propagation delay (tPLH/tPHL), 25-Ω integrated output series resistors to suppress transmission-line reflections, and Ioff support for partial-power-down operation. It operates at 4.75–5.25 V, delivers ±15 mA output drive, and is used in backplane data latching and memory address buffering.

For engineers reviewing the CY74FCT2374CTSOC datasheet, CY74FCT2374CTSOC pinout, CY74FCT2374CTSOC application, or CY74FCT2374CTSOC equivalent, key selection criteria include 3-state bus contention control, TTL-compatible input thresholds, 250-MHz switching capability, and SOIC-20 package thermal performance (θJA = 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). Each flip-flop samples its dedicated D-input under setup/hold timing constraints (tsu = 1.5 ns, th = 1.0 ns) and holds state until the next active clock edge.

Output-enable (OE) controls all eight outputs simultaneously: OE = L enables driven outputs (VOH = 3.3 V typ, VOL = 0.55 V max); OE = H places outputs in high-impedance (IOZH/IOZL ≤ ±10 µA). Edge-rate control circuitry ensures matched rise/fall times and reduced EMI.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW), body width 7.5 mm, height ≤2.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1 (unlimited floor life).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74FCT2374TSOC and 74ACT273SCX, CY74FCT2374CTSOC uniquely combines 5.2 ns speed, on-die 25-Ω termination, and Ioff protection - making it optimal for noise-sensitive, hot-pluggable, and high-density bus designs where reliability and layout simplicity are critical.

Availability

CY74FCT2374CTSOC is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, backplane data latching, and memory address buffering requiring stable component supply across extended production lifecycles.

Supply support for CY74FCT2374CTSOC 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 connectivity solutions for industrial, automotive, and communications markets.

CY74FCT2374CTSOC belongs to the TI FCT logic family - engineered for high-speed, low-noise 5-V bus interfacing with robust ESD immunity and partial-power-down capability.

FAQ

What is the maximum clock frequency supported by CY74FCT2374CTSOC?

CY74FCT2374CTSOC supports a typical switching rate of 250 MHz, derived from its 5.2 ns maximum propagation delay (tPLH/tPHL) and tight timing margins (tsu = 1.5 ns, th = 1.0 ns). This enables reliable operation in 200-MHz synchronous bus systems with design margin. The device does not specify a hard maximum frequency limit but is characterized up to 250 MHz under standard load conditions (CL = 50 pF).

Does CY74FCT2374CTSOC require external pull-up or pull-down resistors on unused inputs?

Yes - per TI's recommended operating conditions, all unused inputs of CY74FCT2374CTSOC must be held at either VCC or GND to ensure proper device operation and prevent floating nodes that could cause excessive ICC current or metastability. This applies to all D inputs, CP, and OE pins not actively used in the design.

How does the 25-Ω output series resistance in CY74FCT2374CTSOC improve signal integrity?

The 25-Ω output series resistance in CY74FCT2374CTSOC is integrated on-die and matches typical PCB trace impedance (50–75 Ω) to reduce signal reflections at the source end. This minimizes overshoot, undershoot, and ringing on unterminated transmission lines - eliminating the need for external series resistors and improving eye diagram quality in high-speed bus applications without altering layout.

Can CY74FCT2374CTSOC be used in hot-swap applications?

Yes - CY74FCT2374CTSOC supports partial-power-down via its Ioff feature, which limits reverse current to ±1 µA when VCC = 0 V and outputs are biased to 4.5 V. This prevents damaging backflow through powered-down sections of a live backplane, making it suitable for hot-plug I/O modules in industrial and telecom systems where controlled insertion/removal is required.

What is the thermal performance of CY74FCT2374CTSOC in SOIC-20 package?

CY74FCT2374CTSOC in SOIC-20 (DW) package has a junction-to-ambient thermal resistance (θJA) of 58°C/W under standard JEDEC test conditions. This value assumes a 1-inch² copper pad with two thermal vias; actual board-level performance depends on PCB copper area and airflow. For continuous 8-bit switching at 10 MHz, typical power dissipation remains below 15 mW, keeping junction temperature well within the –40°C to 85°C operating range.