CY7C4231V-25AXC

FIFOs Memory Overview

The CY7C4231V-25AXC is a low-voltage, high-speed synchronous FIFO memory with a density of 2K x 9 bits. It operates at a maximum frequency of 40 MHz with a minimum cycle time of 25 ns and an access time of 15 ns. The device functions on a 3.3 V supply with active current consumption of 20 mA. It features independent read and write clocks, programmable Almost Full/Empty flags, and 5V-tolerant inputs. The component is housed in a 32-pin Pb-Free Thin Quad Flatpack (A32) package.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read/write operations using independent clock domains.
• Includes programmable Almost Full and Almost Empty status flags for precise buffer management.
• Features 5V-tolerant input pins to facilitate integration into mixed-voltage systems.

FIFOs Memory Applications

• High-speed data acquisition buffering
• Multi-processor interface synchronization
• Communications system buffering

FIFOs Memory Procurement Notes

Verify the specific suffix 'AXC' confirms the Pb-Free Thin Quad Flatpack (A32) package type and commercial temperature range. Ensure the ordering code matches the required 25 ns speed grade. Confirm RoHS compliance status if required by local regulations. Cross-reference the manufacturer's latest datasheet revision to validate pinout and electrical characteristics against current production standards.

FIFOs Memory Selection Notes

Select this component when a 2K depth with 9-bit width is required for asynchronous data transfer between clock domains. The 25 ns speed grade suits applications operating up to 40 MHz. Consider the industrial temperature variant if ambient conditions exceed standard commercial limits. Verify that the 3.3 V logic level compatibility aligns with the target system voltage requirements.

FIFOs Memory Part Context

This part belongs to the CY7C42X1V family of low-voltage synchronous FIFOs manufactured by Cypress Semiconductor, now part of Infineon Technologies. The family includes variants ranging from 64x9 to 8Kx9 densities. The CY7C4231V specifically provides 2048 words of storage, bridging the gap between smaller 1K buffers and larger 4K or 8K configurations.

FIFOs Memory Replacement Considerations

CY7C4231V-25AC serves as a non-Pb-Free equivalent within the same package footprint. CY7C4231V-15AXC offers faster performance but requires verification of timing constraints. Direct substitutes from other manufacturers require careful evaluation of pin compatibility and electrical specifications.

FIFOs Memory FAQ

How are the programmable flag offsets configured?

The offset registers are programmed by holding WEN2/LD LOW during reset and using subsequent write clock cycles to load data into the empty and full offset LSB and MSB registers.

What is the function of the WEN2/LD pin?

WEN2/LD acts as a dual-purpose pin: it serves as a second write enable when held HIGH at reset, or as a load control for programming flag offsets when held LOW at reset.