71V2556SA133BGI

Overview

The Renesas Electronics Corporation 71V2556SA133BGI is a 4.5 Mbit (128K x 36) Zero Bus Turnaround (ZBT) synchronous static random-access memory (SRAM). It operates with a core voltage of 3.3 V and features 2.5 V I/O levels. The device supports a maximum clock frequency of 133 MHz with an access time of 4.2 ns. It utilizes a parallel interface and is housed in a 119-pin plastic ball grid array (PBGA) package measuring 14x22 mm. The component is designed for high-speed data buffering applications requiring pipelined architecture.

Feature Summary

• Zero Bus Turnaround (ZBT) technology eliminates dead bus cycles during read-to-write or write-to-read transitions, maximizing throughput efficiency.
• Synchronous pipelined architecture registers address, control, and data signals to support high-frequency operation up to 133 MHz.
• Dual-voltage design separates the 3.3 V core supply from the 2.5 V I/O supply, allowing compatibility with mixed-voltage system environments.

Applications

• High-performance networking equipment requiring low-latency packet buffering
• Telecommunications infrastructure systems utilizing synchronous data processing
• Industrial automation controllers needing fast local data storage

Procurement Notes

This component has been officially discontinued by the manufacturer. Production ended on January 3, 2024, as indicated in Product Change Notification documents. Current availability is restricted to remaining stock from authorized distributors. Buyers must verify the authenticity of existing inventory and confirm that the specific lot meets moisture sensitivity level requirements before procurement.

Selection Notes

Engineers should evaluate alternative components due to the discontinuation status of this part. When selecting a replacement, ensure the new device matches the 128K x 36 organization and 119-pin PBGA footprint. Verify that the substitute supports ZBT technology if zero turnaround latency is critical for the application timing constraints.

Part Context

The 71V2556 belongs to the IDT/Renesas 71V2556 family of synchronous SRAMs. This series is characterized by its ZBT architecture, which distinguishes it from standard synchronous memories by removing turnaround delays. The BGI suffix denotes the specific 119-pin PBGA package variant with industrial temperature range capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Renesas cross-reference guides for compatible devices.