MC74ACT646DWR2

Buffers, Drivers, Receivers, Transceivers Overview

The MC74ACT646DWR2G is an octal bus transceiver and register with 3-state outputs, manufactured by onsemi. It belongs to the 74ACT logic series and operates within a supply voltage range of 4.5 V to 5.5 V. The device features independent registers for A and B buses, allowing multiplexed real-time and stored data transfers. It provides non-inverting data paths and TTL-compatible inputs. Packaged in a 24-lead SOIC (DW suffix), it supports surface-mount installation and functions across an ambient temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides registered bus transceiver circuits with D-type flip-flops and control circuitry for multiplexed data transmission.
• Features independent storage registers for both A and B buses to support real-time and stored data transfer modes.
• Includes non-inverting data paths with 3-state outputs capable of sourcing and sinking significant drive currents.

Buffers, Drivers, Receivers, Transceivers Applications

• Multiplexed real-time and stored data transfers between system buses
• High-performance register applications requiring TTL-compatible inputs
• Bus-oriented memory and I/O systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'G' indicates a lead-free package configuration as documented in the manufacturer's ordering information. Confirm that the 'R2' designation corresponds to tape and reel shipping specifications. Ensure compatibility with the required 24-lead SOIC footprint during procurement planning.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when TTL-compatible inputs are required alongside high-speed CMOS performance characteristics. The device is suitable for designs needing simultaneous real-time pass-through and registered data storage capabilities. Verify that the operating voltage requirements align with the specified 4.5 V to 5.5 V range for proper functionality.

Buffers, Drivers, Receivers, Transceivers Part Context

This part is part of the MC74AC646/74ACT646 family of octal transceivers. The ACT variant specifically offers TTL-compatible input thresholds while maintaining CMOS output levels. It serves as a registered interface solution for connecting microprocessors or controllers to peripheral devices in complex digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitute part numbers include CD74ACT646M96 from Texas Instruments. Verify pinout compatibility and electrical specifications before substitution.