Texas Instruments CY74FCT16374CTPACT

Overview

CY74FCT16374CTPACT from Texas Instruments is a 16-bit edge-triggered D-type register IC designed for high-speed, low-power bus buffering in industrial-grade digital systems. It features 48-pin TSSOP packaging, 5.2 ns max propagation delay (CLK to O), ±10% 5 V supply tolerance, and I_off support for partial power-down operation. It is commonly deployed in backplane interface circuits requiring robust drive capability and noise immunity.

For engineers reviewing the CY74FCT16374CTPACT datasheet, CY74FCT16374CTPACT pinout, CY74FCT16374CTPACT application, or CY74FCT16374CTPACT equivalent, key selection criteria include its 64 mA sink / 32 mA source output drive strength, flow-through pinout architecture, industrial temperature range (−40°C to +85°C), and compatibility with TTL- and CMOS-level inputs.

Technical Context

The CY74FCT16374CTPACT implements dual 8-bit or unified 16-bit register functionality via shared clock (CLK) and active-low output enable (OE) inputs. Its edge-rate controlled outputs reduce switching noise, and I_off circuitry disables outputs during power-down to prevent current backflow.

It operates strictly at V_CC = 5 V ±10%, supports TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), and delivers guaranteed timing performance across −40°C to +85°C with t_PLH/t_PHL ≤ 5.2 ns, t_SU = 2.0 ns, and t_H = 1.5 ns.

Key Specifications

Pinout & Package

Package: 48-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, body size 12.5 × 6.1 mm, max height 1.2 mm, lead pitch 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered buffer applications.

Compared with CY74FCT162374CTPACT and SN74ALVCH16374DGGR, CY74FCT16374CTPACT uniquely combines 5 V operation, high sink current for capacitive loads, and I_off-enabled power management-making it irreplaceable in legacy industrial backplane upgrades requiring robustness and compatibility.

Availability

CY74FCT16374CTPACT is available at Aetrix Electronics and suitable for industrial PLC expansion, backplane interface buffering, and legacy system bus isolation requiring stable component supply and long-term lifecycle support.

Supply support for CY74FCT16374CTPACT 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 decades of industrial-grade product validation.

The CY74FCT16374CTPACT belongs to TI's FCT logic family, engineered specifically for high-noise-margin, 5 V bus interfacing in industrial and telecom infrastructure where reliability, drive strength, and power-down safety are critical.

FAQ

What is the maximum clock frequency supported by CY74FCT16374CTPACT?

The CY74FCT16374CTPACT does not specify a maximum clock frequency directly, but its 5.2 ns propagation delay and 3.3 ns minimum clock pulse width imply reliable operation up to approximately 190 MHz in ideal conditions. Actual usable frequency depends on board layout, load capacitance, and timing margins required by the system design. The CY74FCT16374CTPACT is typically deployed in 20–80 MHz industrial bus applications where setup/hold timing is rigorously maintained.

Does CY74FCT16374CTPACT support mixed-voltage operation (e.g., 3.3 V inputs with 5 V V_CC)?

Yes - the CY74FCT16374CTPACT accepts TTL- and CMOS-compatible input voltages across its full V_CC range (4.5–5.5 V). With V_CC = 5 V, inputs at 3.3 V exceed the guaranteed V_IH threshold of 2.0 V, ensuring reliable HIGH recognition. However, the device itself operates only at 5 V; it does not translate or regulate input voltage levels. All inputs must remain within −0.5 V to 7.0 V absolute maximum ratings.

How does the I_off feature function in CY74FCT16374CTPACT during partial power-down?

The I_off circuitry in CY74FCT16374CTPACT automatically disables all outputs when V_CC = 0 V, regardless of input states, limiting leakage current to ±1 µA per pin. This prevents current backflow from live buses into the unpowered device - a critical safeguard in hot-swap modules or multi-rail systems. The CY74FCT16374CTPACT remains fully compliant with JEDEC JESD78 Class II latch-up immunity under these conditions.

Can CY74FCT16374CTPACT be used as two independent 8-bit registers?

Yes - the CY74FCT16374CTPACT contains two functionally independent 8-bit register sections (labeled "1" and "2"), each with dedicated clock (1CLK/2CLK) and output enable (1OE/2OE) inputs. By applying separate control signals, designers can latch different data streams on distinct edges or hold one section while updating the other - enabling flexible time-multiplexed or channel-isolated operation without external gating logic.

What is the significance of the "C" suffix in CY74FCT16374CTPACT?

The "C" in CY74FCT16374CTPACT denotes the commercial/industrial speed grade with 5.2 ns maximum propagation delay (vs. "A" = 6.5 ns, "T" = 10.0 ns). It also identifies the specific output driver configuration: the "C" variant provides asymmetric 64 mA sink / 32 mA source capability optimized for driving heavy capacitive loads like backplanes, distinguishing it from the balanced 24 mA drivers in the "CY74FCT162374C" series. This suffix is integral to correct functional and timing selection.