CY7C4221-15AXC

FIFOs Memory Overview

The CY7C4221-15AXC is a 1K x 9 synchronous FIFO memory manufactured by Cypress Semiconductor. It features a 9-bit data bus width and operates with a maximum clock frequency of 66.7 MHz, corresponding to a cycle time of 15 ns. The device utilizes CMOS technology and supports simultaneous asynchronous read and write operations. It includes programmable Almost Empty and Almost Full flags, TTL-compatible inputs, and independent read/write enable pins.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read and write operations using separate clocks.
• Features programmable Almost Empty and Almost Full status flags for precise buffer management.
• Includes Independent Read and Write Enable pins for flexible control logic integration.
• Offers width-expansion capability to increase data bus width beyond the native 9 bits.

FIFOs Memory Applications

• High speed data acquisition systems
• Multiprocessor interfaces
• Communications buffering

FIFOs Memory Procurement Notes

Verify the specific suffix 'AXC' against official documentation to confirm package type and lead-free status. Confirm the operating temperature range matches the commercial specification. Ensure the source document explicitly lists this exact part number variant to avoid confusion with other speed grades or packages in the CY7C42X1 family.

FIFOs Memory Selection Notes

Select this component when a 1K depth and 9-bit width are required for synchronous buffering. The -15 speed grade provides a 15 ns cycle time suitable for 66.7 MHz applications. Consider the TQFP package if space-saving surface mount is needed, or PLCC if through-hole compatibility with legacy designs like IDT72221 is required.

FIFOs Memory Part Context

This part belongs to the CY7C42X1 family of high-speed, low-power synchronous FIFOs. The family includes densities ranging from 64x9 to 8Kx9. The CY7C4221 specifically offers 1K x 9 organization. It is pin-compatible and functionally equivalent to IDT72421, 72201, 72211, 72221, 72231, and 72241.

FIFOs Memory Replacement Considerations

Pin-compatible substitutes include IDT72421, 72201, 72211, 72221, 72231, and 72241. Verify that replacement parts support the same 15 ns cycle time and 5V operation.