CY7C4235-15AC

FIFOs Memory Overview

The CY7C4235-15AC is a 2K x 18 synchronous FIFO memory manufactured by Cypress Semiconductor. It operates at a maximum frequency of 66.7 MHz with a minimum cycle time of 15 ns and a maximum access time of 10 ns. The device features independent read and write clocks, programmable Almost Full/Empty flags, and retransmit functionality. It is available in a 64-pin TQFP package and supports width and depth expansion for system scalability.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read/write operations with independent clock domains.
• Includes programmable Almost Full and Almost Empty status flags for precise buffer management.
• Features a retransmit function to acknowledge data receipt and repeat transmission if necessary.
• Enables system scalability through dedicated pins for width and depth expansion configurations.

FIFOs Memory Applications

• High-speed data acquisition systems requiring temporary storage.
• Multiprocessor interfaces needing reliable data buffering.
• Communications equipment utilizing packet-based data transfer protocols.

FIFOs Memory Procurement Notes

Verify the specific suffix AC corresponds to the commercial temperature range and TQFP package as defined in the official selection guide. Confirm that the -15 speed grade matches the required 66.7 MHz operational frequency for your design. Ensure compatibility with existing 5V logic levels and check for any obsolete status or end-of-life notices from the manufacturer before finalizing procurement plans.

FIFOs Memory Selection Notes

Select this component when a 2K word depth with an 18-bit data width is required. The -15 speed grade provides a balance between performance and power consumption for general-purpose applications. Consider the TQFP package for surface-mount assembly needs. Evaluate the need for programmable flags and retransmit capabilities against simpler FIFO alternatives to ensure optimal system complexity and cost efficiency.

FIFOs Memory Part Context

This part belongs to the CY7C42X5 family of high-speed, low-power synchronous FIFOs. The family includes variants with densities ranging from 64x18 to 4Kx18. All members share pin and functional compatibility with IDT722X5 devices, facilitating direct replacement in existing designs. The series utilizes advanced 0.65m N-Well CMOS technology for improved performance and noise immunity.

FIFOs Memory Replacement Considerations

The CY7C4235-15AC is functionally compatible with the IDT72235. Verify pinout alignment and electrical characteristics before substitution. Other family members like CY7C4225 or CY7C4245 offer different depths but share similar control logic. Ensure the replacement supports the required 18-bit width and synchronous operation mode.