CY7C4271-15AC

Overview

The CY7C4271-15AC is a 32K x 9 deep synchronous FIFO memory fabricated using 0.5 micron CMOS technology. It supports a maximum clock frequency of 66.7 MHz with a minimum cycle time of 15 ns and a data access time of 10 ns. The device operates on a single 5V power supply (±10%) within the commercial temperature range of 0°C to +70°C, drawing an active current of 35 mA. It features independent read and write clocks, programmable Almost Full/Empty flags, and is housed in a 32-pin TQFP package.

Feature Summary

• Supports fully asynchronous and simultaneous read/write operations with independent clock domains.
• Includes programmable status flags for precise buffer management.
• Enables width expansion by cascading multiple devices.

Applications

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

Procurement Notes

Verify the specific suffix 'AC' corresponds to the commercial temperature grade and standard plastic TQFP packaging. Confirm that the component is sourced from authorized distributors or verified secondary markets due to potential end-of-life status associated with this legacy Cypress/Infineon product family.

Selection Notes

Select this model when a 32K depth and 9-bit word width are required for synchronous buffering applications. Ensure the system design accommodates the 5V logic levels and 35 mA active current consumption. Verify that the 15 ns cycle time meets the timing requirements of the host processor or bus architecture.

Part Context

This component belongs to the CY7C42X1 family of deep synchronous FIFOs, which also includes the 16K density variant (CY7C4261). The family utilizes advanced 0.5 micron CMOS processes to deliver high speed and low power characteristics suitable for demanding digital signal processing and communication environments.

Replacement Considerations

Public confirmed substitutes include the IDT7232L18PE and IDT7232L18PGE. These parts offer pin-compatible upgrades with similar specifications.

FAQ

How is the WEN2/LD pin configured?

The WEN2/LD pin functions as a second write enable if held HIGH at reset, or as a load control for programmable flag offsets if held LOW at reset.

What is the default value for the programmable flags?

The Almost Empty and Almost Full flags default to Empty + 7 and Full - 7 respectively, but can be programmed via the offset registers.