QS74FCT646TSO

Buffers, Drivers, Receivers, Transceivers Overview

The QS74FCT646TSO is a registered bus transceiver from the FCT series, manufactured by Quality Semiconductor Inc. It features two functions, each handling eight bits of data with true output polarity. The device utilizes CMOS technology and is housed in a 48-pin PDSO package. It supports bidirectional data flow with independent direction control for each function. The component operates within an industrial temperature range of -40°C to +85°C and is designed for high-speed digital applications requiring multiplexed transmission capabilities.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Registered bus transceiver architecture allowing multiplexed transmission of real-time or stored data
• Independent direction control for dual 8-bit functions
• True TTL input and output compatibility ensuring signal integrity
• Power-off disable outputs enabling live insertion without system disruption

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data bus interfaces in industrial computing systems
• Multiplexed data storage and retrieval circuits
• Bidirectional data buffering in communication modules
• Live insertion peripheral interface designs

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer designation as Quality Semiconductor Inc, distinct from IDT variants. Confirm the package type is PDSO48 and the operating temperature range covers -40°C to +85°C. Ensure the specific suffix TSO matches the required pinout and thermal characteristics. Check RoHS compliance status as indicated in official documentation, noting potential lead-based variations in older batches.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when dual independent 8-bit registered transceivers are required. It is suitable for applications needing multiplexed data paths between registers and buses. Consider the PDSO48 package constraints for PCB layout. Verify voltage levels match the 5V supply requirement typical for FCT logic families. Ensure the bidirectional nature aligns with the system's data flow requirements.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Fast CMOS (FCT) logic family, known for speed comparable to bipolar FAST logic but with lower power consumption. The registered variant integrates D-type flip-flops, distinguishing it from non-registered transceivers like the 245 series. It serves as a bridge between microprocessors and memory or I/O devices in complex digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

IDT74FCT646ATSO is a documented equivalent offering identical functionality and pinout. CD74FCT646CTM provides similar registered transceiver capabilities but may differ in package style. Verify electrical parameters and package dimensions before substitution.