CY7C4251-10JXC

FIFOs Memory Overview

The CY7C4251-10JXC is a high-speed, low-power synchronous FIFO memory with an 8K x 9 organization. It operates at frequencies up to 100 MHz with a 10 ns cycle time. The device features fully asynchronous and simultaneous read/write capabilities controlled by independent clocks. It includes programmable Almost Empty and Almost Full flags for precise buffer management. The component is housed in a 32-pin PLCC package and supports width expansion.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read and write operations using independent clock domains.
• Features programmable Almost Empty and Almost Full status flags for granular buffer level monitoring.
• Provides expandable word width capability through parallel connection of multiple devices.
• Includes dedicated Output Enable pin to control three-state data bus driving.

FIFOs Memory Applications

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

FIFOs Memory Procurement Notes

Verify the specific suffix 'JXC' indicates Pb-free packaging as documented in the selection guide. Confirm the '-10' speed grade corresponds to the 100 MHz maximum frequency specification. Ensure the PLCC package type matches the target PCB footprint requirements. Cross-reference the density against other CY7C42X1 variants if different storage depths are required.

FIFOs Memory Selection Notes

Select this model for applications requiring 8K depth with 9-bit data width. Choose the -10 speed grade for designs operating at or below 100 MHz. Consider the Industrial temperature range variant if ambient conditions exceed commercial limits. Evaluate width expansion needs to determine if single or multiple devices are optimal for system architecture.

FIFOs Memory Part Context

This component belongs to the CY7C42X1 family of synchronous FIFOs manufactured by Cypress Semiconductor, now part of Infineon Technologies. The family offers various densities ranging from 64 to 8K words. These devices utilize advanced CMOS technology to provide high performance with low power consumption, serving as standard solutions for data buffering in digital systems.

FIFOs Memory Replacement Considerations

Pin-compatible and functionally equivalent replacements include IDT72421, IDT72201, IDT72211, IDT72221, IDT72231, and IDT72241. Verify electrical characteristics and timing parameters match the original design requirements before substitution.

FIFOs Memory FAQ

How are the Programmable Almost Empty (PAE) and Almost Full (PAF) flags configured?

These flags are configured by holding WEN2/LD LOW during reset and using WCLK to write offset values into the internal registers. The default offset value is typically set to 7 words.

Can the read and write clocks operate independently?

Yes, the device supports fully asynchronous operation where the Read Clock (RCLK) and Write Clock (WCLK) can run independently or be tied together for single-clock operation.