67C401-15NL

Overview

The AMD 67C401-15NL is an asynchronous First-In-First-Out (FIFO) buffer memory component manufactured by Advanced Micro Devices. It features a storage organization of 64 words by 4 bits, providing temporary data buffering capabilities for digital systems. The device supports a maximum data rate of 15 MHz and operates with independent read and write clocks, allowing for flexible interface integration between disparate clock domains. It is housed in a 20-pin PLCC package.

Feature Summary

• Asynchronous operation with independent read and write clock domains
• Uni-directional data flow for temporary storage and buffering
• CMOS RAM-based architecture for high-performance buffering

Applications

• Data buffering between microcontrollers and peripheral devices
• Interface bridging between systems operating at different clock speeds
• Temporary storage in digital signal processing chains

Procurement Notes

Verify the specific suffix 'NL' corresponds to the 20-PLCC package and 15 MHz speed grade when sourcing. Confirm that the asynchronous nature aligns with system timing requirements. Ensure compatibility with existing PCB footprints for the PLCC form factor during procurement planning.

Selection Notes

Select this component when a small, uni-directional FIFO buffer is required for 4-bit wide data paths. The 15 MHz speed rating suits applications where moderate throughput is sufficient. Consider the PLCC package constraints if surface-mount density is a priority, as alternative packages like PDIP or SOIC may exist within the same series.

Part Context

This part belongs to the AMD 67C40X/XX series of CMOS FIFO buffers. The series typically includes variants with different access times and package options, such as the 67C401-25J. These components are designed for general-purpose buffering in embedded systems and industrial control applications requiring reliable data synchronization.

Replacement Considerations

The 67C401-25J is a confirmed substitute within the same series, offering identical 64x4 functionality but with a 25 MHz speed rating. Verify pinout compatibility and ensure the higher speed does not introduce timing issues in the target application.