CY7C421-20VXC

FIFOs Memory Overview

The CY7C421-20VXC is a 512 × 9 asynchronous FIFO memory component manufactured by Infineon Technologies (formerly Cypress Semiconductor). It operates at a maximum frequency of 50 MHz with a 20 ns access time. The device utilizes dual-port RAM cells and supports independent read and write operations. It features TTL-compatible inputs, low operating power consumption, and provides Empty, Full, and Half Full status flags. The part is housed in a 28-pin 300-mil molded SOJ package.

FIFOs Memory Feature Summary

• Supports asynchronous read and write operations up to 50 MHz using dual-port RAM architecture
• Includes Empty, Full, and Half Full flags for flow control and overflow prevention
• Features retransmit capability in standalone and width expansion modes
• Allows unlimited depth and width expansion through dedicated expansion pins

FIFOs Memory Applications

• Buffering data between components operating at different clock speeds
• Packet storage and retransmission in communication systems
• Data rate matching in high-speed digital interfaces

FIFOs Memory Procurement Notes

Verify the specific suffix 'VXC' corresponds to the 28-pin Molded SOJ package and commercial temperature range. Confirm RoHS compliance status as indicated by the 'X' suffix. Check current product lifecycle status, as older Cypress memory parts may be subject to discontinuation or obsolescence notices from Infineon.

FIFOs Memory Selection Notes

Select this part when a 512-word by 9-bit depth is required with asynchronous interface timing. Ensure the system voltage matches the 5 V ± 10% requirement. Consider the 20 ns access time against system cycle requirements. Verify that the 28-pin SOJ package form factor fits the target PCB layout constraints.

FIFOs Memory Part Context

This component belongs to the CY7C421 family of asynchronous FIFOs. It is functionally equivalent to legacy parts such as the IDT7201 and AM7201. The device is fabricated using 0.65-micron P-well CMOS technology and includes ESD protection greater than 2000 V. It is part of Infineon's broader memory portfolio acquired from Cypress Semiconductor.

FIFOs Memory Replacement Considerations

Pin-compatible and functionally equivalent replacements include the IDT7201 and AM7201. Verify electrical characteristics and package dimensions match before substitution.