71V2556SA100BG8

Memory IC Overview

The 71V2556SA100BG8 is a 4.5 Mbit synchronous SRAM organized as 128K x 36, manufactured by Renesas Electronics Corporation. It operates with a 3.3V core supply and 2.5V I/O voltage, supporting a maximum clock frequency of 100 MHz with a 5 ns access time. The device utilizes Zero Bus Turnaround (ZBT) technology to eliminate dead cycles between read and write operations. It features pipelined architecture, four-word burst capability, and individual byte write controls. The component is housed in a 119-pin PBGA package measuring 14x22 mm and supports an operating temperature range from -40°C to +85°C.

Memory IC Feature Summary

• Zero Bus Turnaround (ZBT) technology eliminates dead bus cycles during bus turnaround between reads and writes.
• Pipelined architecture provides four cycles of data for a single address presentation.
• Internally synchronized output buffer enable removes the need for external OE control.
• Supports interleaved or linear four-word burst capabilities.

Memory IC Applications

• High-performance processor secondary cache systems
• Network equipment requiring high-speed data buffering
• Industrial automation controllers needing fast memory access

Memory IC Procurement Notes

Verify RoHS compliance status carefully, as documentation indicates non-compliance for this specific part number. Confirm package authenticity against the 119-PBGA specification. Check for moisture sensitivity level 3 handling requirements during storage and assembly. Ensure the supplier provides valid traceability documents given the component's discontinued status.

Memory IC Selection Notes

Select this component when ZBT performance is required to maximize bus efficiency in synchronous designs. The 36-bit width suits applications needing wide data paths without parallel chip expansion. Verify that the 2.5V I/O interface is compatible with the target system logic levels. Consider the BGA package constraints for PCB layout and thermal management.

Memory IC Part Context

This part belongs to the 71V2556 family of synchronous SRAMs. It shares architectural similarities with other ZBT devices but is distinguished by its specific speed grade and package configuration. The 'BG' suffix denotes the 119-pin PBGA package, while 'G8' typically indicates tape and reel packaging variations within the product line.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Renesas obsolescence notices for potential lifecycle alternatives.