74ACQ646SC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ACQ646SC 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 2.0V to 6.0V and supports TTL input/output levels. The device provides independent registers for A and B buses, enabling multiplexed real-time and stored data transfers via CPAB and CPBA clock inputs. Packaged in a 24-lead Small Outline Integrated Circuit (SOIC), it delivers output currents of 24 mA and ensures simultaneous switching noise control with guaranteed pin-to-pin skew performance.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Utilizes FACT Quiet Series technology for improved dynamic threshold performance and quiet output switching
• Features independent storage registers for both A and B buses to support multiplexed data transfer modes
• Provides controlled simultaneous switching noise levels and guaranteed pin-to-pin skew AC performance

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data bus systems requiring registered transmission
• Multiplexed data transfer applications between microprocessors and memory
• Bus-oriented architectures needing isolated real-time and stored data paths

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering code suffix against current manufacturer documentation to confirm package type and tape/reel availability. Confirm that the component meets required environmental specifications and logic family compatibility before integration into final designs.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal bidirectional data transfer with internal storage capabilities. Ensure the operating voltage aligns with the 2.0V to 6.0V specification and verify that the SOIC-24 package dimensions fit the target PCB layout constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACQ/ACTQ series of octal transceivers and registers. It is designed for high-performance digital logic applications where data integrity and timing precision are critical. The device integrates D-type flip-flops with bus transceiver functionality to manage complex data routing tasks efficiently.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check datasheets for equivalent parts from other manufacturers offering similar octal transceiver functions. Verify pin compatibility, voltage ranges, and propagation delay specifications to ensure seamless substitution without circuit redesign.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the 74ACQ646 handle data transfer between buses?

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

What technology ensures low noise performance in this device?

The device employs FACT Quiet Series technology, which includes GTO output control and undershoot correction to minimize simultaneous switching noise.