MC74AC646DWR2G

Overview

The MC74AC646DWR2G is an octal bus transceiver from the 74AC logic series, manufactured by onsemi. It features non-inverting data transfer with three-state outputs and operates within a supply voltage range of 2 V to 6 V. The device provides a propagation delay of 16.5 ns, with low-level output current of 24 mA and high-level output current of -24 mA. It is housed in a SOIC-24 package and supports surface mount installation. The component functions as both a bus transceiver and register, operating reliably between -40°C and +85°C.

Feature Summary

• Octal configuration for efficient parallel data handling
• Three-state outputs enable direct system bus connections
• Non-inverting signal path maintains logical polarity

Applications

• System memory address decoding
• Clock drivers and buffered oscillators
• Register I/O expansion

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required packaging options such as reel or cut tape configurations. Confirm RoHS compliance status through official documentation before integration. Check for moisture sensitivity classification requirements during storage and handling procedures. Validate that the SOIC-24 footprint matches the target PCB design constraints accurately.

Selection Notes

Select this component when an octal wide-voltage transceiver is required for systems operating between 2 V and 6 V. The 74AC series offers faster performance compared to standard HC counterparts while maintaining CMOS compatibility. Ensure the application benefits from the non-inverting nature and three-state control capabilities for bus isolation purposes.

Part Context

This part belongs to the MC74AC646 family of octal bus transceivers. It serves as a critical interface element in digital logic circuits requiring bidirectional data flow control. The device integrates level shifting and buffering capabilities suitable for various industrial and commercial applications.

Replacement Considerations

Check for equivalent parts from other manufacturers offering identical pinouts and electrical characteristics. Verify if alternative suffixes provide different packaging formats without altering functional specifications.