CY7C4251V-15AC

FIFOs Memory Overview

The CY7C4251V-15AC is a low-voltage synchronous FIFO memory with an 8K x 9 organization, providing 72 kbit of storage. It operates at a maximum frequency of 66.7 MHz with an access time of 11 ns and a cycle time of 15 ns. The device supports a supply voltage range of 3.0 V to 3.6 V and draws a maximum active current of 20 mA in commercial applications. It features independent read and write clocks, programmable Almost Empty/Full flags, and 5V-tolerant inputs. The component is housed in a 32-pin TQFP package.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read/write operations using independent clock domains.
• Includes programmable Almost Empty and Almost Full status flags for precise buffer management.
• Features 5V-tolerant inputs allowing direct interfacing with legacy logic systems.
• Provides width expansion capability by connecting multiple devices for wider data buses.

FIFOs Memory Applications

• High-speed data acquisition systems requiring temporary storage.
• Multi-processor interfaces managing data flow between processors.
• Communications buffering for network and serial protocols.

FIFOs Memory Procurement Notes

Verify the specific suffix 'AC' corresponds to the standard 32-lead Thin Quad Flatpack (TQFP) package and Commercial temperature range as defined in the official ordering guide. Confirm that the source documentation explicitly lists this part number variant before procurement, as suffixes dictate package type and operating conditions. Cross-reference the manufacturer's latest selection guide to ensure availability and compliance with current RoHS standards.

FIFOs Memory Selection Notes

Select this component when an 8K depth and 9-bit width are required for synchronous buffering. Ensure the system design accommodates independent Read and Write Clock signals for optimal performance. Verify that the 3.3V supply voltage aligns with the target platform. Consider the 5V-tolerant input feature if interfacing with higher voltage logic levels without additional level shifting circuitry.

FIFOs Memory Part Context

This device belongs to the CY7C42X1V family of low-voltage synchronous FIFOs, which includes densities ranging from 64 x 9 to 8K x 9. Manufactured using advanced 0.65 µm P-Well CMOS technology, the family shares common control logic and flag architectures. The CY7C4251V represents the highest density option within this specific series, offering the largest buffer capacity among the listed variants.

FIFOs Memory Replacement Considerations

CY7C4251V-15AXC

FIFOs Memory FAQ

How are the Programmable Almost Empty and Almost Full flags configured?

The flags are configured via offset registers accessed through the WEN2/LD pin. When held LOW during reset, this pin enables loading or reading of the empty and full offset values into the internal registers.

What is the function of the WEN2/LD dual-purpose pin?

If held HIGH at reset, it acts as a second write enable for depth expansion. If held LOW at reset, it functions as a Load (LD) enable to program or read the programmable flag offset registers.