Texas Instruments CY74FCT2374ATSOCG4

Overview

CY74FCT2374ATSOCG4 from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for bus-oriented digital systems. 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, enabling reliable operation in high-speed data latching applications such as address/data bus registration.

For engineers reviewing the CY74FCT2374ATSOCG4 datasheet, CY74FCT2374ATSOCG4 pinout, CY74FCT2374ATSOCG4 application, or CY74FCT2374ATSOCG4 equivalent, key selection criteria include 3-state bus drive capability, 12 mA sink / 15 mA source output current, -40°C to 85°C industrial temperature range, and SOIC-20 package compatibility with legacy FCT logic designs.

Technical Context

This device implements eight independent D-type flip-flops sharing a common buffered clock (CP) and active-low output-enable (OE) control. Each flip-flop captures D-input state on the low-to-high CP transition, with setup time of 2 ns and hold time of 1.5 ns under recommended operating conditions.

Edge-rate control circuitry and integrated 25-Ω series output resistors suppress transmission-line reflections, while I_off protection prevents backflow current during partial power-down. Outputs achieve VOH = 3.3 V (typical) and VOL = 0.55 V (max) at 12 mA sink, ensuring robust noise immunity in mixed-signal environments.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW), 7.6 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY74FCT2374ATSOCG4, SN74FCT2374ATSOC offers identical functionality with TI-standard branding, while CY74FCT2374ATSOCT provides the same silicon in tape-and-reel format-enabling seamless migration between prototyping (tube) and volume manufacturing (reel) without design or layout changes.

Availability

CY74FCT2374ATSOCG4 is available at Aetrix Electronics and suitable for industrial automation, test instrumentation, and automotive body electronics requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY74FCT2374ATSOCG4 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 logic solutions for industrial, automotive, and communications markets since 1930.

CY74FCT2374ATSOCG4 belongs to the FCT logic family, engineered for high-speed, low-noise bus interface applications where signal integrity, power-down safety, and TTL compatibility are critical.

FAQ

What is the maximum clock frequency supported by CY74FCT2374ATSOCG4?

CY74FCT2374ATSOCG4 supports a typical switching rate of 250 MHz, with guaranteed timing performance up to 150 MHz based on 6.5 ns maximum propagation delay and 2 ns minimum setup time. This allows reliable use in high-speed data capture systems where precise edge alignment is required.

Does CY74FCT2374ATSOCG4 require external pull-up or pull-down resistors on its control inputs?

No, CY74FCT2374ATSOCG4 does not require external pull-up or pull-down resistors on CP or OE inputs. Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and low input leakage (<±1 µA) ensure stable logic levels when driven directly from microcontrollers or other logic devices.

Can CY74FCT2374ATSOCG4 be used in mixed-voltage systems with 3.3 V controllers?

CY74FCT2374ATSOCG4 is a 5 V-only device with VCC range 4.75–5.25 V. It accepts 3.3 V logic-high inputs (VIH min = 2.0 V), but its outputs swing to ~3.3 V VOH (typical) and cannot safely drive 3.3 V-only inputs without level translation due to VOL = 0.55 V (max) exceeding 3.3 V logic-low thresholds.

How does the I_off feature protect CY74FCT2374ATSOCG4 during partial power-down?

When VCC = 0 V, the I_off circuitry in CY74FCT2374ATSOCG4 limits current flow through powered I/O pins to ±1 µA, preventing reverse current from back-driving the unpowered IC. This safeguards both CY74FCT2374ATSOCG4 and upstream drivers during controlled power sequencing or hot-swap events.

Is CY74FCT2374ATSOCG4 pin-compatible with older 74FCT374 devices?

Yes, CY74FCT2374ATSOCG4 is functionally and pinout-compatible with CY74FCT374T and SN74FCT374, sharing identical SOIC-20 pin assignments, logic behavior, and 3-state control. It improves upon them with integrated 25-Ω output resistors and enhanced noise suppression circuitry.