74FCT16244CTPVCTG4

Overview

The Texas Instruments 74FCT16244CTPVCTG4 is a 16-bit buffer and line driver belonging to the FCT logic family. It features three-state outputs, non-inverting polarity, and operates within a 4.5V to 5.5V supply range across an industrial temperature span of -40°C to +85°C. The component utilizes a 48-lead TSSOP package with a 19.6-mil pitch. Electrical characteristics include a maximum propagation delay of 4.1 ns, output skew of 0.5 ns, and high drive capabilities of 32 mA source and 64 mA sink current.

Feature Summary

• Supports partial-power-down mode operation via Ioff circuitry to prevent damaging backflow currents when powered down.
• Incorporates edge-rate control circuitry to significantly improve noise characteristics and reduce system switching noise.
• Features flow-through pinout architecture that simplifies board layout for memory drivers, clock drivers, and bus interfaces.

Applications

• Memory driver applications requiring high-speed data transfer
• Clock distribution networks demanding low power consumption
• Bus interface systems utilizing high-capacitance loads or low-impedance backplanes

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance status as per manufacturer documentation. Confirm the device availability status, as older FCT series components may be subject to discontinuation notices. Ensure the ordering code matches the exact speed grade (C) and package type (TSSOP) required for the design specifications.

Selection Notes

Select this component for designs requiring 16-bit buffering with high drive strength and low ground bounce. The C-speed grade offers faster switching than standard variants. Consider the TSSOP package constraints for thermal management and PCB space. Verify input compatibility with driving logic levels to ensure proper VIH and VIL margins are met during operation.

Part Context

This part belongs to the CY74FCT16244T family of 16-bit buffers. It shares functional similarities with the CY74FCT162244T and CY74FCT162H244T but differs in output drive balance and input features like bus hold. The FCT series provides CMOS input compatibility with TTL-like drive strengths, bridging legacy and modern logic requirements.

Replacement Considerations

CY74FCT16244ATPACT

FAQ

What is the function of the Ioff feature?

The Ioff circuitry disables the outputs when the device is powered down, preventing damaging current backflow through the device during partial-power-down mode operations.

How does the edge-rate control benefit the circuit?

Edge-rate control circuitry improves noise characteristics by reducing signal overshoot and undershoot, which minimizes ground bounce and crosstalk in high-speed digital systems.