MC74AC648DW

Overview

The MC74AC648DW is an octal bus transceiver manufactured by onsemi, belonging to the 74AC logic family. It features a single element with eight bits per element and non-inverting polarity. The device supports a supply voltage range of 2V to 6V and provides tri-state outputs capable of sourcing and sinking 24mA. It is housed in a 24-SOIC package with a width of 7.50mm and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Octal bus transceiver architecture providing bidirectional data transfer capability for eight-bit parallel buses.
• Tri-state output design allows connection to multiple devices on a shared bus without signal contention.
• Non-inverting logic function ensures input signals are transmitted to outputs without polarity change.

Applications

• Mobile applications requiring low power consumption and high-speed data transmission.
• Clock drivers and buffer circuits in digital systems.
• Memory module data bus interfaces.

Procurement Notes

Verify the specific suffix 'DW' against the manufacturer's current datasheet to confirm package dimensions and tape/reel specifications. Confirm RoHS compliance status as manufacturing processes may update environmental declarations over time. Ensure the component source is authorized to avoid counterfeit risks for obsolete or legacy parts.

Selection Notes

Select this component when an octal, non-inverting bus transceiver is required for system interconnects. Compare propagation delay specifications against the target clock frequency to ensure timing margins are met. Verify that the 24mA drive strength is sufficient for the connected load capacitance and trace requirements.

Part Context

This part belongs to the 74AC series of CMOS logic integrated circuits from onsemi. The AC series offers higher speed performance compared to standard HC series devices while maintaining compatibility with TTL input levels at specific voltages. It serves as a fundamental building block for digital logic designs requiring robust bus driving capabilities.

Replacement Considerations

Public confirmed substitute part numbers include MC74AC646DWG and MC74AC646DWR2G from onsemi. These alternatives are listed as parameter equivalent replacements for the discontinued MC74AC648SC variant.