CY7C421-40JC

Overview

The CY7C421-40JC is a synchronous FIFO memory integrated circuit manufactured by Cypress Semiconductor Corp. It features a storage capacity of 512 words by 18 bits, providing a total memory density suitable for data buffering applications. The device operates with a maximum access time of 40 nanoseconds and supports a clock frequency of up to 20 MHz. It is designed for unidirectional data transfer and functions within a supply voltage range of 4.5 V to 5.5 V. The component is housed in a 32-pin PLCC package with dimensions of 11.43 mm by 13.97 mm. It supports programmable flags and retransmit capabilities, operating reliably within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Synchronous operation with unidirectional data flow capability
• Supports programmable status flags for full/empty detection
• Includes retransmit functionality for reliable data handling

Applications

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

Procurement Notes

Verify the specific suffix 'JC' against official Cypress documentation to confirm the exact package type and temperature grade. Ensure compatibility with 5V logic levels and check for RoHS compliance requirements relative to current manufacturing standards. Confirm availability through authorized distributors as this component may be subject to lifecycle changes.

Selection Notes

Select this component when a synchronous FIFO with 18-bit word width and 512-depth is required. The 40ns access time suits moderate-speed applications. Verify that the 32-PLCC package fits the PCB layout constraints. Consider power consumption limits and ensure the system operates within the specified 4.5V to 5.5V voltage range.

Part Context

This part belongs to the CY7C421 series of synchronous FIFOs from Cypress Semiconductor. The series offers various speed grades and package options. The CY7C421-40JC specifically denotes the 40ns speed variant in a PLCC package. It is distinct from asynchronous variants like the CY7C421-40VCR which uses a different interface protocol and package.

Replacement Considerations

Check for direct substitutes within the CY7C421 family with different speed grades or packages. Verify pin-to-pin compatibility before replacing. No specific public substitute part numbers are confirmed in the provided data.