CY7C4285-10ASC

FIFOs Memory Overview

The CY7C4285-10ASC is a 64K x 18 Deep Sync FIFO memory fabricated using 0.5 micron CMOS technology. It supports asynchronous and simultaneous read/write operations with independent clocks, achieving a maximum frequency of 100 MHz and a cycle time of 10 ns. The device features programmable Almost Empty and Almost Full flags, retransmit capability, and width/depth expansion options. It operates at 5V ± 10% within the commercial temperature range of 0°C to +70°C.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read and write operations with independent clock inputs.
• Includes programmable Almost Empty and Almost Full status flags for precise buffer management.
• Enables depth and width expansion through dedicated cascade input and output pins.
• Provides a retransmit function to facilitate data packet acknowledgment and error recovery.

FIFOs Memory Applications

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

FIFOs Memory Procurement Notes

Verify the specific suffix ASC confirms the 64K density, 10 ns speed grade, and 64-pin TQFP package. Confirm the operating range matches commercial requirements (0°C to +70°C). Check for end-of-life status as Cypress products may be discontinued or superseded by newer families.

FIFOs Memory Selection Notes

Select this component when 64K x 18 word depth and 100 MHz throughput are required. Ensure the design accommodates independent read and write clocks if asynchronous operation is needed. Verify that the 5V logic levels and TTL compatibility match the system interface requirements.

FIFOs Memory Part Context

This part belongs to the CY7C42X5 family of high-speed, low-power FIFO memories. It is pin-compatible with the smaller 32K density variant (CY7C4275) and offers a density upgrade path. The family utilizes advanced 0.5 micron CMOS processes for optimized speed and power consumption.

FIFOs Memory Replacement Considerations

Public confirmed substitute part numbers: None available in source material.

FIFOs Memory FAQ

How are the Almost Empty and Almost Full flags synchronized?

The PAE and PAF flags become synchronous when the VCC/SMODE pin is tied to VSS. In this mode, PAE updates on the rising edge of RCLK and PAF updates on the rising edge of WCLK.

What is the function of the FL/RT pin?

In cascaded configurations, it serves as the First Load control. In stand-alone mode, it acts as the Retransmit input; strobing it resets the internal read pointer to the first physical location.