71V2556S150PFG

Overview

The 71V2556S150PFG is a 4.5 Mbit synchronous SRAM organized as 128K x 36, manufactured by Renesas Electronics Corporation. It operates with a core voltage of 3.3V and supports an I/O frequency of 150 MHz with a 3.8 ns access time. The device utilizes Zero Bus Turnaround (ZBT) technology to eliminate dead cycles during bus turnaround. It features pipelined architecture, four-word burst capability, and individual byte write controls. The component is housed in a 100-pin TQFP package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Zero Bus Turnaround (ZBT) technology eliminates dead bus cycles between read and write operations
• Fully pipelined architecture with internally synchronized output buffer enable
• Four-word burst capability supporting interleaved or linear modes
• Individual byte write control for precise data masking

Applications

• High-performance processor secondary cache systems
• Network routing and switching equipment buffers
• Telecommunications base station signal processing
• Industrial automation controller memory modules

Procurement Notes

Verify the specific suffix 'PFG' against official Renesas documentation to confirm the exact package dimensions and lead finish specifications. Confirm current lifecycle status as distribution sources may list obsolete components. Ensure compatibility with 3.3V core and 2.5V I/O supply requirements if applicable to the target design.

Selection Notes

Select this component when zero-latency bus turnaround is critical for system throughput. The 128K x 36 organization suits wide-data-path applications requiring high-speed parallel access. Consider the 150 MHz clock speed relative to system timing constraints. Verify thermal management capabilities for the TQFP package within the specified industrial temperature range.

Part Context

This part belongs to the 71V2556 family of ZBT synchronous SRAMs. It shares architectural similarities with other members like the 71V2556S133PFGI but offers higher clock speeds. The family is designed for embedded systems requiring fast, deterministic memory access without the complexity of DRAM refresh cycles.

Replacement Considerations

The 71V2556S133PFGI is documented as a similar alternative within the same manufacturer portfolio.