71V2556SA133BG8

Overview

The 71V2556SA133BG8 is a 4.5Mb (128K x 36) synchronous ZBT SRAM manufactured by Renesas Electronics Corporation. It operates at a clock frequency of 133 MHz with a 4.2 ns access time. The device uses a 119-pin PBGA package and requires a core voltage of 3.135V to 3.465V. It supports 2.5V I/O levels and functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Zero Bus Turnaround (ZBT) architecture eliminates dead bus cycles during read/write transitions.
• Synchronous pipelined design provides four cycles of data for a single address presentation.
• Optional boundary scan JTAG interface compliant with IEEE 1149.1 standards.

Applications

• High-performance processor secondary cache systems
• Network routing and switching equipment buffers
• Telecommunications infrastructure signal processing

Procurement Notes

Verify component authenticity through authorized channels as the part is obsolete. Confirm RoHS compliance status, which indicates non-compliance in official records. Check for lead-free alternatives if environmental regulations require it. Validate package integrity upon receipt due to surface mount sensitivity.

Selection Notes

Select this component for applications requiring high-speed parallel data buffering with minimal turnaround latency. Ensure system power supplies support the specified 3.3V core and 2.5V I/O requirements. Verify PCB layout compatibility with the 119-pin BGA footprint and thermal management needs for commercial grade operation.

Part Context

This device belongs to the 71V2556 family of synchronous ZBT SRAMs. It shares architectural similarities with other variants like the 71V2556SA133BG but differs in packaging format. The series is designed to replace asynchronous memories in high-throughput digital systems requiring deterministic timing.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consider evaluating the 71V2556SA133BG for identical electrical specifications if packaging differences are acceptable. Verify pinout compatibility before substitution.