71V65903S85BG

Overview

The IDT71V65903S85BG is a 9Mb (512K x 18) synchronous static random-access memory IC manufactured by Renesas Electronics. It utilizes Zero Bus Turnaround (ZBT) technology to eliminate dead bus cycles during read/write transitions, ensuring high-speed data throughput. The device operates with a parallel interface and supports an access time of 8.5 ns at a maximum clock frequency of 87 MHz. It functions within a supply voltage range of 3.135V to 3.465V and is housed in a 119-pin PBGA package.

Feature Summary

• Zero Bus Turnaround (ZBT) architecture eliminates dead bus cycles between read and write operations for continuous data flow.
• Synchronous Single Data Rate (SDR) operation allows high-frequency performance up to 87 MHz.
• Integrated address, data-in, and control signal registers optimize system timing and reduce external logic requirements.

Applications

• High-performance embedded systems requiring fast memory access
• Network infrastructure equipment and routers
• Industrial automation controllers

Procurement Notes

Verify the specific suffix 'BG' against official datasheets to confirm the 119-PBGA package and commercial temperature range. Confirm RoHS compliance status as some listings indicate non-compliance. Check current lifecycle status, as this component may be subject to discontinuation notices or production changes documented in Product Change Notices.

Selection Notes

Select this component when a 512K x 18 organization is required for wide-data applications. Ensure the design supports 3.3V I/O levels and synchronous clocking. Compare against the 71V65903S80PFI if a TQFP package or 8ns speed is preferred over the PBGA form factor. Verify that the 119-pin BGA footprint matches the PCB layout constraints.

Part Context

This part belongs to the 71V65903 family of ZBT Synchronous SRAMs from Renesas. It shares architectural similarities with other members like the 71V65903S80PFI but differs in package type and specific timing characteristics. The family is designed for applications demanding high bandwidth and low latency without the complexity of asynchronous interfaces.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The 71V65903S85PFG8 is listed as obsolete. Designers should consult official Renesas resources for current alternatives or verify pin-to-pin compatibility with similar ZBT SRAM devices.