71V3556SA166BGI8

Memory IC Overview

The 71V3556SA166BGI8 is a synchronous single data rate zero bus turnaround SRAM manufactured by Renesas Electronics Corporation. It offers a storage capacity of 4.5 Mbit organized as 128K x 36. The device supports a maximum clock frequency of 166 MHz with an access time of 3.5 ns. It operates within a supply voltage range of 3.135 V to 3.465 V and functions at temperatures between -40°C and 85°C. The component is housed in a 119-pin PBGA package measuring 14x22 mm.

Memory IC Feature Summary

• Synchronous parallel interface architecture designed for high-speed data transfer applications
• Zero bus turnaround technology eliminates dead cycles during read-to-write or write-to-read transitions
• Pipelined output structure ensures consistent throughput without wait states

Memory IC Applications

• High-performance networking equipment requiring fast memory buffering
• Telecommunications systems utilizing parallel data processing
• Industrial control systems operating in extended temperature environments

Memory IC Procurement Notes

Verify the specific suffix BGI8 to confirm the 119-PBGA package type and industrial temperature rating. Confirm RoHS compliance status as documentation indicates non-compliance. Check for end-of-life notices, as production may be discontinued. Ensure compatibility with existing PCB footprints for the 14x22 mm substrate. Validate moisture sensitivity level requirements for assembly processes.

Memory IC Selection Notes

Select this component when a 36-bit wide parallel interface is required for synchronous memory operations. Consider the 166 MHz speed grade if higher latency is acceptable in alternative packages. Evaluate the 119-pin PBGA footprint against available board space constraints. Compare power consumption specifications against system thermal limits. Verify that the 3.3V I/O logic levels match the host processor interface.

Memory IC Part Context

This part belongs to the 71V3556 family of synchronous SRAMs from Renesas. It shares architectural similarities with other variants in the series but differs in speed grade and packaging. The 'SA' suffix typically denotes specific performance or environmental characteristics within the product line. Understanding the broader family helps in identifying compatible pinouts and electrical characteristics across different speed bins.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the specialized nature of the 119-PBGA package and specific speed grade, direct replacements may require redesigning the printed circuit board layout. Consult manufacturer resources for potential obsolescence management options.