71V2556S100PFG

Overview

The 71V2556S100PFG is a 4.5 Mbit synchronous static random-access memory (SRAM) integrated circuit manufactured by Renesas Electronics Corporation. It features a parallel interface with a data organization of 128K x 36 bits. The device operates at a maximum clock frequency of 100 MHz and provides an access time of 5 ns. It requires a supply voltage range of 3.135 V to 3.465 V. The component is housed in a 100-pin Thin Quad Flat Package (TQFP) with dimensions of 14x14 mm. It supports an industrial operating temperature range from -40°C to +85°C.

Feature Summary

• Zero Bus Turnaround (ZBT) architecture eliminates dead cycles between read and write operations.
• Internally synchronized output buffer enable removes the need for external Output Enable control.
• Single Read/Write control pin simplifies interface logic requirements.
• Positive clock-edge triggered registers for address, data, and control signals support fully pipelined applications.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data storage in industrial automation controllers

Procurement Notes

Verify RoHS compliance status as documentation indicates variations across production lots; some sources list compliance while others note non-compliance. Confirm package marking and date codes against current manufacturing notices. Check for End-of-Life declarations affecting long-term availability. Validate moisture sensitivity level handling procedures during assembly.

Selection Notes

Select this component when ZBT performance is required to maximize bus throughput without turnaround latency. Ensure system design accommodates the specific 3.3V core voltage and 2.5V I/O voltage requirements. Verify that the 100-pin TQFP footprint matches the PCB layout constraints. Consider thermal dissipation capabilities within the specified industrial temperature range.

Part Context

This part belongs to the 71V2556 family of synchronous SRAMs, which utilizes Zero Bus Turnaround technology to enhance data transfer efficiency. The family includes variants with different speeds and packages, such as the 71V2556S150PFGI for higher speed applications. The 71V2556 series is designed for applications requiring high-density memory with fast access times in a compact surface-mount package.

Replacement Considerations

The 71V2556S133PFG offers similar functionality with a higher clock frequency of 133 MHz. The 71V2556S150PFGI provides increased speed up to 150 MHz. Both alternatives maintain the same 128K x 36 organization and 100-pin TQFP package, ensuring pin compatibility.