71V2556S100PFG

Overview

The IDT 71V2556S100PFG is a 3.3V Synchronous ZBT SRAM with a memory organization of 128K x 36 bits, providing a total capacity of 4.5 Mbit. It operates at a maximum clock frequency of 100 MHz with a typical access time of 5 ns. The device utilizes a 100-pin TQFP package and supports 3.3V core voltage with specific I/O requirements.

Feature Summary

• Eliminates dead bus cycles during read-to-write or write-to-read transitions
• Features internally synchronized output buffer enable to simplify control logic
• Supports individual byte write operations for data masking

Applications

• High-performance system interconnects requiring zero wait states
• Network routing and switching equipment buffers
• Telecommunications infrastructure signal processing

Procurement Notes

Verify the exact suffix configuration against the manufacturer's current datasheet, as variations such as 'I8' may indicate specific packaging or environmental compliance differences. Confirm that the 100-pin TQFP package availability aligns with current production status, as this component family has undergone lifecycle changes by Renesas Electronics Corporation.

Selection Notes

Select this component when system architecture requires synchronous pipelined SRAM with ZBT technology to maximize throughput without adding latency. Ensure the design accommodates the specific 3.3V core and required I/O voltage levels. Verify that the 100-pin TQFP footprint fits the PCB layout constraints and that thermal dissipation meets the operating temperature range specifications.

Part Context

This part belongs to the IDT 71V2556 series of high-speed synchronous SRAMs. The series is characterized by its Zero Bus Turnaround (ZBT) technology, which optimizes data transfer efficiency in parallel interfaces. The 128K x 36 organization makes it suitable for wide-data-path applications compared to narrower 8-bit or 16-bit variants.

Replacement Considerations

Public confirmed substitute part numbers include 71V2556S133PFGI and 71V2556S150PFGI from Renesas Electronics Corporation. These alternatives offer different clock speeds while maintaining similar architectural features.