CY7C421-20JC

FIFOs Memory Overview

The CY7C421-20JC is a synchronous first-in, first-out (FIFO) memory integrated circuit manufactured by Cypress Semiconductor Corp. It features a storage capacity of 512 words by 9 bits and operates with a maximum access time of 20 nanoseconds. The device supports a data rate of 33.3 MHz and functions within a supply voltage range of 4.5 V to 5.5 V. It utilizes a unidirectional bus architecture and is housed in a 32-pin PLCC package measuring 11.43 x 13.97 mm. The component is designed for surface mount installation and operates within a commercial temperature range of 0°C to 70°C.

FIFOs Memory Feature Summary

• Synchronous FIFO architecture supporting unidirectional data transfer
• Configurable programmable flags for status monitoring
• Supports relay capability for signal buffering

FIFOs Memory Applications

• Data buffering between asynchronous system domains
• Interface bridging in high-speed digital communication systems
• Temporary storage in embedded processing applications

FIFOs Memory Procurement Notes

Verify the specific suffix 'JC' confirms the 20ns speed grade and 32-PLCC package configuration. Confirm RoHS compliance status as historical Cypress products may not meet current environmental directives. Ensure the supplier provides valid traceability documentation for this discontinued or legacy part number. Check for moisture sensitivity level requirements during handling and storage.

FIFOs Memory Selection Notes

Select this component when a synchronous FIFO interface is required for 9-bit wide data paths. The 512-word depth suits moderate buffering needs without excessive board space consumption. Verify that the 4.5V to 5.5V supply voltage aligns with the target system logic levels. Consider the 32-PLCC package constraints for PCB layout and thermal management requirements.

FIFOs Memory Part Context

The CY7C421 series represents a family of synchronous FIFO memories from Cypress Semiconductor. This specific model belongs to the 512x9 organization variant. It shares architectural similarities with other CY7C421 models but differs in speed grades and package options. The series was widely used in legacy industrial and telecommunications equipment before newer generations replaced it.

FIFOs Memory Replacement Considerations

Direct pin-compatible replacements include the CY7C421-25JC or CY7C421-10JC for different speed grades. Verify functional equivalence regarding flag outputs and relay capabilities. Cross-reference with Infineon Technologies equivalents if Cypress inventory is unavailable.