74FCT162240CTPACT

Overview

The Texas Instruments 74FCT162240CTPACT is a 16-bit buffer and line driver belonging to the FCT logic series. It features balanced output drivers with current limiting resistors, providing 24 mA sink and source currents. The device operates within an industrial temperature range of -40°C to +85°C at a supply voltage of 5V ± 10%. Key electrical parameters include a typical propagation delay of 4.3 ns, output skew of 0.5 ns, and quiescent power supply current of 5 µA. It utilizes a 48-lead TSSOP package.

Feature Summary

• Integrated Ioff circuitry supports partial-power-down mode operation by disabling outputs to prevent damaging current backflow when powered down.
• Features edge-rate control circuitry designed to significantly improve noise characteristics and reduce system switching noise.
• Balanced output drivers incorporate internal current limiting resistors to minimize undershoot and ground bounce effects.

Applications

• Memory driver applications requiring high speed and low power consumption
• Clock driver circuits in high-speed digital systems
• Bus interface applications utilizing flow-through pinout configurations

Procurement Notes

Verify the specific ordering suffix 'CTPACT' corresponds to the 48-lead TSSOP package variant with the specified 4.3 ns speed grade. Confirm that the component status remains active for new designs or check for lifetime-buy availability if production is discontinued. Ensure compatibility with the required industrial temperature range and RoHS compliance standards before finalizing procurement orders.

Selection Notes

Select this component for designs requiring 16-bit buffering with controlled edge rates to mitigate signal integrity issues. The balanced 24 mA drivers are suitable for driving transmission lines without external terminating resistors. Consider the TSSOP package dimensions for board layout constraints and verify that the 5V supply voltage aligns with the target system architecture requirements.

Part Context

This part belongs to the CY74FCT162240T family of 16-bit buffers and line drivers manufactured by Texas Instruments. The FCT series is characterized by CMOS technology offering high-speed performance comparable to TTL while maintaining low power consumption. The specific model integrates advanced noise reduction features distinct from standard FCT variants.

Replacement Considerations

The CY74FCT162240ATPACT serves as a functional substitute within the same family, differing primarily in the propagation delay specification of 4.8 ns compared to the 4.3 ns of the CT variant. Both share identical pinouts and package types.

FAQ

How does the Ioff feature function in this device?

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.

What is the purpose of the balanced output drivers?

The balanced output drivers include current limiting resistors to reduce the need for external terminating resistors, minimize undershoot, and provide reduced ground bounce when driving transmission lines.