CY7C4255-10AXC

FIFOs Memory Overview

The CY7C4255-10AXC is an 8K x 18 deep synchronous FIFO memory fabricated using 0.5 micron CMOS technology. It supports asynchronous read and write operations with independent clocks, achieving a maximum frequency of 100 MHz. The device features programmable Almost Empty and Almost Full flags, retransmit capability, and width/depth expansion logic. It operates within a commercial temperature range of 0°C to +70°C at a supply voltage of 5V ± 10%. Available in 64-pin TQFP and STQFP packages, it provides TTL-compatible inputs and center power/ground pins for noise reduction.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read/write operations with independent clock domains.
• Includes programmable status flags for Almost Empty and Almost Full conditions.
• Enables depth and width expansion through dedicated cascade input and output pins.
• Features a retransmit function to facilitate packet data acknowledgment and re-sending.

FIFOs Memory Applications

• High-speed data acquisition systems requiring buffering between disparate clock domains.
• Multiprocessor interfaces needing reliable data transfer control.
• Communications buffering applications handling variable data rates.

FIFOs Memory Procurement Notes

Verify the specific suffix 'AXC' against official Infineon or Cypress documentation to confirm package type and lead-free status. Ensure the source document explicitly links this suffix to the CY7C4255 model. Confirm availability as this component family may be subject to discontinuation notices. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and current production status.

FIFOs Memory Selection Notes

Select this component when an 8K x 18 buffer is required for asynchronous interface bridging. Consider the CY7C4265 if double the depth (16K) is needed while maintaining pin compatibility. Evaluate the need for programmable flags versus fixed thresholds. Verify that the 5V supply voltage aligns with the system design constraints before finalizing the selection.

FIFOs Memory Part Context

This device belongs to the CY7C42X5 family of deep synchronous FIFOs manufactured by Cypress Semiconductor, now part of Infineon Technologies. The family includes variants with different densities and speeds, such as the CY7C4265. These components are designed for high-performance buffering in digital systems, offering flexibility through expansion capabilities and configurable status flags.

FIFOs Memory Replacement Considerations

The CY7C4265 serves as a pin-compatible density upgrade option within the same family. For cross-manufacturer replacements, the IDT72205/15/25/35/45 series is documented as pin-compatible. Verify electrical characteristics and flag logic compatibility before substituting.