CY7C4255-10AC

FIFOs Memory Overview

The CY7C4255-10AC is an 8K x 18 deep synchronous FIFO memory fabricated using 0.5 micron CMOS technology. It operates at a maximum frequency of 100 MHz with a cycle time of 10 ns and data access time of 8 ns. The device features independent read and write clocks, programmable Almost Full/Empty flags, and retransmit functionality. It supports width and depth expansion via cascade pins and is available in 64-pin TQFP packages.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read/write operations with independent clock domains.
• Includes programmable status flags for Empty, Full, Half Full, and configurable Almost Empty/Almost Full states.
• Enables depth expansion through dedicated Write and Read Expansion Input/Output pins.
• Features a retransmit function to reset the internal read pointer for packet acknowledgment.

FIFOs Memory Applications

• High-speed data acquisition systems
• Multiprocessor interface buffering
• Communications data buffering

FIFOs Memory Procurement Notes

Verify the specific suffix '10AC' against official Infineon/Cypress documentation to confirm it corresponds to the 10 ns speed grade (100 MHz) within the commercial temperature range. Ensure the package type matches the required 64-pin TQFP or STQFP form factor. Confirm RoHS compliance status if lead-free packaging is mandatory for the target assembly process.

FIFOs Memory Selection Notes

Select this component when an 18-bit wide buffer is required with independent read and write clock control. It is suitable for applications needing precise flow control via programmable flag offsets. Consider the CY7C4265 variant if double the storage depth is necessary, as both share pin compatibility and functional characteristics.

FIFOs Memory Part Context

This device belongs to the CY7C42X5 family of high-speed, low-power synchronous FIFOs. It is functionally compatible with IDT72205/15/25/35/45 devices and allows for density upgrades within the Cypress/Infineon portfolio. The architecture utilizes dual-port SRAM cells optimized for speed and power efficiency.

FIFOs Memory Replacement Considerations

Pin-compatible alternatives include the CY7C4265 and CY7C4265A for increased density. Cross-brand equivalents such as the IDT72205, IDT72215, IDT72225, IDT72235, and IDT72245 are documented as compatible replacements.