71V3559S85BQG

Overview

The 71V3559S85BQG is a synchronous single data rate zero bus turnaround SRAM manufactured by Renesas Electronics Corporation. It provides a total storage capacity of 4.5 megabits, organized as 256K words by 18 bits. The device features an 8.5 nanosecond access time and operates on a 3.3-volt power supply ranging from 3.135 to 3.465 volts. It utilizes a parallel interface and is housed in a 165-terminal CABGA package measuring 13 by 15 millimeters. The component supports commercial temperature operation between 0°C and 70°C.

Feature Summary

• Supports synchronous burst operations with zero bus turnaround for high-speed data transfer
• Includes self-timed write cycles controlled by global write and byte write enable signals
• Features low power consumption with dedicated power-down control via the ZZ input pin

Applications

• High-performance networking equipment requiring fast buffer memory
• Industrial automation systems utilizing parallel SRAM interfaces
• Telecommunications infrastructure components needing reliable volatile storage

Procurement Notes

Verify RoHS compliance status carefully as this specific part number may not meet current environmental standards. Confirm package dimensions against PCB footprint requirements before integration. Check official manufacturer channels for end-of-life notifications or alternative sourcing options due to potential discontinuation risks associated with older generation SRAM products.

Selection Notes

Select this component when a 256K x 18 organization is required for synchronous applications. Ensure the design accommodates the 165-CABGA package size and thermal characteristics. Verify that the system voltage aligns with the specified 3.3-volt range and that the operating temperature falls within the commercial grade limits defined for this variant.

Part Context

This device belongs to the 71V3559 family of synchronous SRAMs designed for high-speed data processing. It shares architectural similarities with other members like the 71V3559S85BQ but differs in packaging and specific suffix designations. The product line emphasizes performance through synchronous clocking mechanisms while maintaining compatibility with standard parallel bus protocols used in embedded systems.

Replacement Considerations

Consult official substitution guides for equivalent packages or updated versions within the same family. Direct replacements must match the 256K x 18 organization and 8.5 ns speed grade. Verify pinout compatibility if substituting with different package types such as TQFP or PBGA variants.