74AC646SC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74AC646SC is an octal bus transceiver and register with three-state outputs in a 24-lead Small Outline Integrated Circuit (SOIC) package. It features independent registers for A and B buses, allowing multiplexed real-time and stored data transfers. The device operates within a supply voltage range of 2.0V to 6.0V and supports output source/sink currents of 24 mA. It includes D-type flip-flops and control circuitry for data handling functions.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Independent registers for A and B buses
• Multiplexed real-time and stored data transfers
• Three-state outputs

Buffers, Drivers, Receivers, Transceivers Applications

• Registered bus transceiver circuits
• Data storage and transfer systems
• Control circuitry for multiplexed transmission

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering code suffix 'SC' corresponds to the 24-lead SOIC package (M24B). Confirm RoHS compliance status as the datasheet indicates availability in Pb-free packages. Check for any obsolescence notices or alternative package options if the SOIC form factor is not suitable for the target application.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal transceiver with internal storage is required. Ensure the operating voltage aligns with the 2.0V to 6.0V range. Consider the 24-lead SOIC package dimensions for PCB layout. Verify that the 24 mA output drive capability meets the load requirements of the connected bus lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74AC logic family, known for high-speed CMOS operation. It is functionally similar to the 74ACT646 but lacks TTL-compatible input thresholds. The 'SC' suffix denotes the surface-mount SOIC package variant, distinct from the through-hole PDIP option.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The 74ACT646SC is a direct functional replacement, though it requires a 5V supply and has TTL-compatible inputs. Other octal transceivers from different manufacturers may require verification of pinout compatibility and electrical specifications.