CD74FCT162646ATSM

Overview

The CD74FCT162646ATSM is a Registered Bus Transceiver from the FCT series manufactured by Harris Corporation. It features two functional units, each handling eight bits of data with true output polarity. The device utilizes CMOS technology and is housed in a TSSOP-56 package. It supports bidirectional data flow with independent direction control and operates within a supply voltage range of 4.5V to 5.5V. The component is designed for high-speed bus applications requiring registered data transmission.

Feature Summary

• Registered bus transceiver architecture supporting bidirectional data transfer
• Independent direction control for separate operation of two 8-bit functions
• True output polarity with three-state outputs
• CMOS construction compatible with standard logic families

Applications

• High-speed data bus interfaces
• Memory-to-peripheral data transfers
• System board interconnects requiring registered buffering

Procurement Notes

Verify the manufacturer origin as Harris Corporation or its successors, noting that original Harris components may be obsolete. Confirm the specific suffix ATSM corresponds to the TSSOP-56 package and temperature range. Check RoHS compliance status as older Harris parts often lack modern environmental certifications. Ensure the source provides valid datasheets confirming the registered functionality and electrical characteristics distinct from non-registered variants.

Selection Notes

Select this component when registered bus transceivers are required for noise immunity and timing control in bidirectional data paths. The dual 8-bit configuration allows flexible system design without additional logic. Verify that the operating voltage matches the 5V logic family requirements. Consider the TSSOP-56 package constraints for PCB layout and thermal management compared to larger DIP alternatives.

Part Context

This part belongs to the Harris FCT (Fast CMOS Technology) line, which bridges the performance gap between standard TTL and advanced CMOS logic. The 74FCT162646 variant specifically addresses the need for registered data holding on wide buses. Harris Corporation was a significant semiconductor provider before being acquired by Renesas Electronics, affecting current availability and documentation sources.