Texas Instruments CY74FCT374ATSOCT

Overview

CY74FCT374ATSOCT from Texas Instruments is an 8-bit edge-triggered D-type flip-flop register with 3-state outputs, designed for bus-oriented digital systems. It features a buffered clock (CP), common output-enable (OE), ±32 mA output drive, 5.2 ns max propagation delay (tPLH/tPHL), and operates across –40°C to +85°C. It is used in data latching, bus buffering, and address/data isolation in industrial control and embedded computing.

For engineers reviewing the CY74FCT374ATSOCT datasheet, CY74FCT374ATSOCT pinout, CY74FCT374ATSOCT application, or CY74FCT374ATSOCT equivalent, key selection criteria include 3-state bus interface capability, Ioff partial-power-down support, TTL-compatible input thresholds, matched rise/fall times, and SOIC-20 package compatibility with legacy 5 V logic systems.

Technical Context

The CY74FCT374ATSOCT implements eight independent D-type flip-flops synchronized on the low-to-high CP transition, with setup time (tsu) of 2 ns and hold time (th) of 1.5 ns. Its 3-state outputs are controlled solely by OE - independent of clock or stored state - enabling transparent bus sharing without metastability risk.

It integrates edge-rate control circuitry to reduce switching noise and supports partial-power-down via Ioff, which disables outputs and limits reverse current when VCC = 0 V. Input thresholds (VIH = 2 V, VIL = 0.8 V) and output levels (VOH = 2.4 V min at –32 mA, VOL = 0.55 V max at 64 mA) ensure full interoperability with standard TTL and FCT logic families.

Key Specifications

Pinout & Package

Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit registered bus-interface applications.

Compared with SN74FCT374ATSOCT, CY74FCT374ATSOCT offers identical functionality and qualification; versus 74ACT374SCX, it trades higher output voltage for superior bus-noise control, Ioff safety, and guaranteed 5.2 ns timing - making it optimal for industrial backplane and modular I/O designs.

Availability

CY74FCT374ATSOCT is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy bus interface adapters, automated test equipment signal routing, and programmable logic controller backplane buffers requiring stable component supply, long-term lifecycle support, and RoHS-compliant SOIC packaging.

Supply support for CY74FCT374ATSOCT 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 50 years of innovation in high-reliability logic interfaces and industrial-grade ICs.

The CY74FCT374ATSOCT belongs to TI's FCT logic family - engineered for noise-immune, high-drive 5 V bus interfacing in industrial automation, test instrumentation, and legacy system upgrades where timing precision and power sequencing robustness are critical.

FAQ

What is the maximum clock frequency supported by CY74FCT374ATSOCT?

CY74FCT374ATSOCT has a maximum clock pulse width (tw) of 5 ns and propagation delay of 5.2 ns, supporting reliable operation up to 100 MHz in typical system conditions. Its 250-MHz typical switching rate reflects internal gate speed margin, but actual usable frequency depends on setup/hold timing margins, load capacitance, and board layout - design validation at 80–100 MHz is recommended for production use of CY74FCT374ATSOCT.

Does CY74FCT374ATSOCT support partial-power-down mode?

Yes, CY74FCT374ATSOCT includes Ioff circuitry that actively disables outputs when VCC = 0 V, limiting reverse current to ±1 µA even with up to 4.5 V applied at I/O pins. This allows safe insertion or removal in live backplanes and prevents damage during power sequencing mismatches - a key differentiator of CY74FCT374ATSOCT in modular industrial systems.

What is the output drive capability of CY74FCT374ATSOCT?

CY74FCT374ATSOCT provides ±32 mA output source/sink current per pin under recommended operating conditions (VCC = 4.75–5.25 V). Specifically, it delivers –32 mA at VOH ≥ 2.4 V and +64 mA at VOL ≤ 0.55 V - enabling direct drive of multiple TTL loads or long PCB traces without external buffers, a core specification defining CY74FCT374ATSOCT's role in bus-intensive applications.

Is CY74FCT374ATSOCT pin-compatible with older 74LS374 devices?

CY74FCT374ATSOCT uses the same SOIC-20 pinout as 74LS374 and shares identical pin functions (D0–D7, O0–O7, CP, OE, VCC, GND), but differs electrically: it requires 4.75–5.25 V supply (vs. 4.75–5.25 V for LS), offers higher drive strength, and features edge-rate control and Ioff. While drop-in replacement is mechanically possible, verify timing (5.2 ns vs. ~15 ns) and loading compatibility before substituting CY74FCT374ATSOCT in legacy LS designs.

What package type and RoHS status does CY74FCT374ATSOCT use?

CY74FCT374ATSOCT is supplied in a 20-pin SOIC (DW) package measuring 7.5 mm × 12.8 mm, with 1.27 mm lead pitch and NiPdAu lead finish. It is RoHS-compliant (lead-free), rated MSL Level-1 (unlimited floor life), and qualified for reflow per J-STD-020. This standardized SOIC footprint ensures compatibility with automated assembly lines and legacy PCB layouts - a consistent physical attribute across all CY74FCT374ATSOCT production lots.