67L401N

Overview

The Advanced Micro Devices 67L401N is an asynchronous FIFO memory device configured as a 64 x 4 uni-directional buffer. It operates at a maximum data rate of 10MHz with a typical access time of 45ns. The component is housed in a 16-pin PDIP package and supports a supply voltage range of 4.75V to 5.25V. It functions within a commercial temperature range of 0°C to +70°C and draws a current of 160mA.

Feature Summary

• Provides asynchronous first-in, first-out buffering for data flow management between systems operating at different clock speeds.
• Supports uni-directional data transfer with a depth of 64 words and a width of 4 bits.
• Features standard TTL-compatible logic levels for straightforward integration into digital circuits.

Applications

• Data buffering in computer peripheral interfaces
• Synchronization between microprocessors and I/O devices
• Temporary storage in high-speed digital signal processing chains

Procurement Notes

Verify the manufacturer designation carefully, as some sources attribute this part to Integrated Device Technology (IDT) or Renesas due to corporate acquisitions. Confirm the specific package type and speed grade match your design requirements before ordering. Ensure the source provides valid RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component when a small-capacity, low-speed asynchronous buffer is needed for 4-bit wide data paths. It is suitable for applications where clock domain crossing is required but deep memory structures are unnecessary. Consider the 16-pin DIP package constraints for PCB layout and verify that the 10MHz speed meets the system timing requirements.

Part Context

This device belongs to the family of asynchronous FIFO memories designed for temporary data storage. It allows independent read and write clocks, facilitating data transfer between subsystems with different timing characteristics. The 64x4 configuration offers a compact solution for simple buffering tasks in legacy or specialized digital systems.

Replacement Considerations

Check for cross-references from IDT or Renesas if sourcing from modern distributors, as AMD's logic assets were acquired. Verify pin compatibility and electrical specifications against potential substitutes like the IDT 62 series or similar 64x4 FIFOs to ensure functional equivalence in the target circuit.