CY7C421-30PC

Overview

The CY7C421-30PC is an asynchronous FIFO memory IC manufactured by Cypress Semiconductor Corp. It provides a storage capacity of 512 x 9 bits with unidirectional bus direction. The device supports a data rate of 25MHz and features an access time of 30ns. It is housed in a 28-PDIP package.

Feature Summary

• Asynchronous first-in-first-out memory architecture for buffering data between different clock domains
• Unidirectional data transfer capability for single-direction flow applications
• Standard parallel interface configuration for general-purpose logic integration

Applications

• Data buffering in digital signal processing systems
• Interface bridging between components operating at different clock speeds
• Temporary storage in high-speed data acquisition circuits

Procurement Notes

Verify the specific package type and pinout compatibility with your PCB footprint before ordering. Confirm that the asynchronous operation mode aligns with your system timing requirements, as this differs from synchronous alternatives. Ensure voltage levels match your design specifications to prevent damage or malfunction during implementation.

Selection Notes

Select this component when unidirectional asynchronous buffering is required rather than bidirectional or synchronous solutions. Consider the 512 x 9 bit depth and 30ns access speed against your throughput needs. Evaluate the 28-PDIP package constraints if surface mount technology is preferred for production scalability.

Part Context

This part belongs to the CY7C421 series of FIFO memories from Cypress Semiconductor. The series includes various speed grades and package options, such as the CY7C421-10JXC and CY7C421-25PC, offering flexibility in access times and physical form factors for diverse embedded memory applications.

Replacement Considerations

Compatible substitutes include the CY7C421-25PC for faster 25ns access and the CY7C421-10JXC for 10ns performance in a PLCC package. Verify pin compatibility and electrical characteristics when cross-referencing with other asynchronous FIFO devices from different manufacturers.