74AC521PC

Overview

The onsemi 74AC521PC is an octal bus transceiver featuring three-state outputs and active pull-up resistors. It operates within a voltage range of 2.0V to 3.6V, ensuring compatibility with low-voltage systems. The device provides high-speed data transfer capabilities while maintaining low power consumption. Its design includes balanced propagation delays for both rising and falling edges, which supports precise timing in digital circuits. The PC package offers a robust physical form factor suitable for various mounting requirements.

Feature Summary

• Octal configuration allows simultaneous transmission of eight bits of data across the bus.
• Active pull-up resistors ensure defined logic levels without requiring external components.
• Three-state outputs enable multiple devices to share a common data line efficiently.

Applications

• High-performance memory mapping systems
• Clock drivers and buffer applications
• Bus-oriented architectures requiring bidirectional data flow

Procurement Notes

Verify the specific suffix 'PC' indicates the package type and temperature rating during procurement. Confirm that the operating voltage range aligns with your system's power supply specifications. Ensure that the pinout matches your PCB layout design to prevent connection errors. Check for any regional compliance certifications required for your market.

Selection Notes

Select this component when an octal bus transceiver with active pull-ups is required. Consider the 2.0V to 3.6V operating range for low-voltage applications. Evaluate the trade-off between speed and power consumption against other AC series variants. Ensure the package style fits your assembly constraints.

Part Context

This part belongs to the 74AC family of high-speed CMOS logic devices. It serves as a critical interface component in digital systems, facilitating data movement between different voltage domains or bus structures. The AC series is known for its superior performance compared to older HC or HCT families.

Replacement Considerations

Check for direct replacements from onsemi or other manufacturers offering equivalent octal bus transceivers with active pull-ups. Verify pin compatibility and electrical characteristics before substitution. Ensure the alternative part meets the same voltage and speed requirements.