IDT74FCT646TPY

Overview

The IDT74FCT646TPY is a Fast CMOS octal bus transceiver and register manufactured by Integrated Device Technology. It integrates three-state D-type flip-flops with control circuitry to enable multiplexed data transmission from the data bus or internal storage registers. The device utilizes enable (G) and direction (DIR) pins for function control, while SAB and SBA pins select between real-time and stored data transfer. This architecture eliminates decoding glitches during transitions. It features high drive outputs and true TTL compatibility, supporting live insertion via power-off disable outputs.

Feature Summary

• Integrates three-state D-type flip-flops for multiplexed data transmission between the bus and internal registers
• Eliminates typical decoding glitches that occur in multiplexers during transitions between stored and real-time data
• Supports live insertion through power-off disable outputs that prevent bus contention when power is removed

Applications

• High-speed data bus interfaces requiring registered buffering
• Multiplexed data transmission systems
• Live insertion applications in bus architectures

Procurement Notes

Verify the specific suffix 'TPY' against official manufacturer documentation to confirm package type and temperature grade. Ensure the component matches the FCT646T functional description. Confirm RoHS compliance status and availability as standard or military grades may vary by suffix.

Selection Notes

Select this component for designs requiring an octal transceiver with integrated registration capabilities. It is suitable for applications needing glitch-free switching between real-time and stored data paths. Verify that the high drive output currents meet the load requirements of the connected bus lines.

Part Context

This part belongs to the FCT series of Fast CMOS logic devices produced by Integrated Device Technology. The series offers performance comparable to or exceeding older ABT functions while maintaining low power consumption. The FCT646 variant specifically provides octal bidirectional data flow with optional storage.