71V3556SA166BGGI

Overview

The IDT71V3556SA166BGGI is a 4.5Mb synchronous ZBT SRAM with a 128K x 36 organization. It operates at a clock frequency of 166 MHz with a 3.5 ns access time. The device uses a 119-PBGA package and supports 3.3V I/O. It features pipelined outputs, a burst counter, and single R/W control. The memory is volatile and designed for high-performance system applications.

Feature Summary

• Synchronous Zero Bus Turnaround (ZBT) technology eliminates dead cycles between write and read operations.
• Pipelined output buffers allow for fully pipelined application architectures without external control overhead.
• Single Read/Write control pin simplifies interface logic by removing the need for separate control signals.

Applications

• High-speed data buffering in telecommunications equipment
• Cache memory systems in network routers and switches
• Digital signal processing applications requiring low-latency access

Procurement Notes

Verify component authenticity through authorized Renesas Electronics distributors due to discontinued status. Confirm package integrity and moisture sensitivity level handling procedures before assembly. Ensure supply chain documentation matches the specific SA suffix variant requirements for lead-free compliance and RoHS standards.

Selection Notes

Select this part for designs requiring 36-bit wide synchronous memory interfaces with ZBT performance characteristics. Compare against standard SDRAM or asynchronous alternatives when cycle efficiency is critical. Consider the 119-pin BGA footprint constraints and thermal management requirements for the PBGA package during PCB layout planning.

Part Context

This component belongs to the IDT 71V3556 family of 3.3V Synchronous ZBT SRAMs. It shares architectural similarities with other variants like the 71V3556S and 71V3558 series, differing primarily in speed grade and package type. The SA suffix typically denotes enhanced specifications or packaging variations within the product line.

Replacement Considerations

The IDT71V3556S166BQGI is listed as a similar replacement option. Verify pinout compatibility and electrical parameter alignment before substitution. Check for any differences in operating temperature ranges or package dimensions that may impact existing board designs.