74ACTQ646SC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ACTQ646SC is an octal bus transceiver and register featuring 3-state outputs, manufactured using FACT Quiet Series technology. It operates within a supply voltage range of 4.5 V to 5.5 V and supports surface mount installation in a 24-lead Small Outline Integrated Circuit (SOIC) package. The device provides independent registers for A and B buses, enabling multiplexed real-time and stored data transfers. It guarantees simultaneous switching noise levels and dynamic threshold performance with faster propagation delays than standard AC/ACT646 devices.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Utilizes FACT Quiet Series technology to ensure quiet output switching and improved dynamic threshold performance.
• Features independent registers for A and B busses allowing multiplexed real-time and stored data transfers.
• Includes GTO output control and undershoot corrector mechanisms alongside a split ground bus design.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented memory and signal buffering
• Clock drivers
• Bidirectional bus communication systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering code suffix against the manufacturer's documentation to confirm the packaging format. The base part number corresponds to tube packaging, while appending the letter 'X' indicates tape and reel availability. Confirm that the component meets the required logic family specifications and operating temperature ranges before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer between two buses is required with optional storage capabilities. The 74ACTQ646SC is suitable for applications demanding low simultaneous switching noise and high-speed operation within a 5 V logic environment. Ensure the system design accommodates the 24 mA output drive capability and the specific timing requirements defined by the ACTQ logic family.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74ACQ/ACTQ series of octal bus transceivers. It integrates registered functionality with three-state outputs, distinguishing it from non-registered counterparts like the 74AC646. The product line emphasizes noise reduction through specialized internal circuitry, making it appropriate for high-density digital systems requiring reliable data transmission across multiple bus lines.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The datasheet does not list specific public substitute part numbers. Verify compatibility with existing designs by comparing pin configurations, electrical characteristics, and logic functions against alternative octal transceivers from other manufacturers if sourcing constraints exist.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the 74ACTQ646SC handle data transfer?

It supports both real-time transparent mode and stored mode via independent registers for the A and B buses, controlled by clock inputs and direction signals.

What technology ensures noise reduction in this device?

The device utilizes FACT Quiet Series technology, which includes GTO output control and an undershoot corrector to guarantee quiet output switching and superior dynamic threshold performance.