CY7C421-15AXCT

FIFOs Memory Overview

The CY7C421-15AXCT is a 512 × 9 asynchronous FIFO memory component manufactured by Infineon Technologies. It features a maximum access time of 15 ns and supports independent read and write operations at speeds up to 50 MHz. The device operates on a single power supply ranging from 4.5 V to 5.5 V, with a maximum operating current of 35 mA. It utilizes dual-port RAM cells for true asynchronous operation and includes Full, Empty, and Half Full status flags. The part is housed in a 32-pin TQFP package.

FIFOs Memory Feature Summary

• Supports independent asynchronous read and write operations using dual-port RAM architecture
• Provides Full, Empty, and Half Full status flags to prevent overflow and underflow
• Enables unlimited expansion in depth and width through dedicated Expansion In/Out pins
• Includes a retransmit feature to repeat data transmission upon request

FIFOs Memory Applications

• Buffering data between components operating at different clock rates
• Data flow-through applications requiring high-speed transfer
• Packet transfer systems utilizing the retransmit capability
• Parallel bus interface buffering

FIFOs Memory Procurement Notes

Verify that the specific suffix 'CT' corresponds to the standard 'XC' (Pb-free) designation documented in the official datasheet ordering information. Confirm the package type matches the 32-pin TQFP specification. Ensure the speed grade aligns with the 15 ns access time requirements for your design.

FIFOs Memory Selection Notes

Select this component when a 512-word depth and 9-bit width are required for asynchronous buffering. It is suitable for designs needing TTL-compatible logic levels and low power consumption. Consider the expansion capabilities if larger memory depths or wider data buses are needed in the future.

FIFOs Memory Part Context

This part belongs to the CY7C421 family of asynchronous FIFO memories. It is functionally equivalent to legacy parts like the IDT7201 and AM7201. The device is fabricated using advanced 0.65-micron P-well CMOS technology, offering high speed and low power dissipation compared to older technologies.

FIFOs Memory Replacement Considerations

The datasheet lists the IDT7201 and AM7201 as pin-compatible and functionally equivalent alternatives.