71V2556SA166BG

Overview

The 71V2556SA166BG is a 4.5 Mbit Synchronous ZBT SRAM organized as 128K x 36, manufactured by Renesas Electronics Corporation. It operates with a maximum clock frequency of 166 MHz and features a 3.5 ns access time. The device utilizes a parallel interface and supports a supply voltage range of 3.135 V to 3.465 V. Designed for surface mount applications, it is housed in a 119-PBGA package measuring 14x22 mm. The component supports an operating temperature range from 0°C to +70°C and includes humidity sensitivity considerations.

Feature Summary

• Synchronous Zero Bus Turnaround (ZBT) architecture eliminates dead bus cycles during read-to-write or write-to-read transitions.
• Single-cycle data throughput capability via pipelined synchronous operation.
• Compatible with standard LVTTL input/output logic levels.

Applications

• High-performance networking equipment requiring low-latency memory buffering
• Telecommunications systems utilizing fast data processing
• Industrial control systems needing reliable synchronous memory solutions

Procurement Notes

Verify the specific suffix 'BG' against official Renesas documentation to confirm package type and pinout compatibility. Confirm current lifecycle status, as this part may be subject to End-of-Life notices. Ensure that the 119-PBGA footprint matches your PCB design constraints. Check for any recent Product Change Notifications regarding substrate or labeling updates before finalizing procurement plans.

Selection Notes

Select this component when a 128K x 36 organization is required for wide-data-path applications. The 166 MHz speed grade suits designs needing high bandwidth without the complexity of asynchronous timing. Consider the PBGA package size for space-constrained boards. Verify that the 3.3V core voltage aligns with your system power rails and that I/O levels match your controller specifications.

Part Context

This part belongs to the 71V2556SA series of Synchronous ZBT SRAMs. It shares architectural similarities with other members like the 71V2556SA133BGG but offers higher clock speeds. The series is designed to replace asynchronous SRAMs in high-speed digital systems, providing deterministic timing through synchronous clocking mechanisms.

Replacement Considerations

Check for direct substitutes within the 71V2556SA family, such as the 71V2556SA133BGG for lower speed requirements. Verify pin-to-pin compatibility with alternative packages if form factor changes are permissible. Consult Renesas for recommended obsolescence alternatives if this specific variant is discontinued.