74AC521MTCX

Overview

The onsemi 74AC521MTCX is an octal bus transceiver featuring three-state outputs, housed in a 20-TSSOP surface-mount package. It operates within a supply voltage range of 2 V to 6 V and supports a wide operating temperature range from -40 °C to +85 °C. The device exhibits a maximum propagation delay of 8.5 ns at 5 V with a 50 pF load. Static current consumption is specified at 4 μA, ensuring efficient power management for high-speed digital applications requiring reliable data transmission.

Feature Summary

• Octal configuration providing eight independent bidirectional data paths
• Three-state outputs enabling direct connection to system buses without additional drivers
• Wide supply voltage compatibility supporting both 3.3 V and 5 V logic systems

Applications

• High-speed data acquisition systems
• Clock driver circuits
• Bus-oriented memory mapping

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to confirm package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the full part number with authorized distributors to guarantee authenticity and traceability. Confirm that the thermal characteristics align with your PCB layout constraints.

Selection Notes

Select this component when designing systems requiring multiple bidirectional data lines with minimal signal distortion. The low static current makes it suitable for battery-powered or energy-efficient designs. Consider the 20-TSSOP footprint for space-constrained layouts. Evaluate the propagation delay specifications against your system timing requirements to ensure signal integrity across all channels.

Part Context

This device belongs to the AC logic family, characterized by high-speed operation compared to standard HC series components. It serves as a critical interface element in digital electronics, facilitating communication between microprocessors and peripheral devices. The TSSOP packaging allows for automated surface-mount assembly, enhancing production efficiency and board density.

Replacement Considerations

Compatible substitutes include MM74AC521MTCX and MC74AC521MTCX from the same manufacturer. Verify pinout compatibility and electrical parameters before substitution. Other manufacturers' equivalent octal bus transceivers may require schematic adjustments due to differing pin configurations.