71V3557S85PFGI

Overview

The IDT71V3557S85PFGI is a synchronous ZBT SRAM with 4.5Mb capacity organized as 128K x 36. It features an 8.5 ns access time and operates on a 3.3V supply voltage ranging from 3.135V to 3.465V. The device utilizes a parallel interface and is housed in a 100-TQFP (14x14) package. It supports surface mount installation and functions within a temperature range of -40°C to 85°C.

Feature Summary

• Synchronous Zero Bus Turnaround (ZBT) technology eliminates dead cycles between write and read operations.
• Internally synchronized output buffer enable removes the need for external control signals.
• Supports high-performance system speeds through efficient data transfer mechanisms.

Applications

• High-speed data buffering in communication systems
• Cache memory applications in embedded processors
• Network equipment data storage

Procurement Notes

Verify component authenticity due to discontinuation status. Confirm RoHS compliance version, as earlier batches may differ. Check for Renesas Electronics branding, reflecting the acquisition of IDT. Ensure packaging integrity for moisture-sensitive level 3 components. Validate replacement part numbers if sourcing new inventory is required.

Selection Notes

Select this component for designs requiring fast synchronous memory with wide data buses. Consider the 100-TQFP package constraints for PCB layout. Evaluate thermal performance within the specified operating temperature range. Verify compatibility with existing system clock frequencies and voltage levels before integration.

Part Context

This part belongs to the IDT 71V3557 family of synchronous ZBT SRAMs. It represents a specific speed grade and package variant within the broader product line. The family is known for high-density memory solutions in compact packages. Renesas Electronics now manages this product series following corporate acquisitions.

Replacement Considerations

Officially documented substitutes include 71V2556S133PFGI and 71V2556S150PFGI from Renesas Electronics Corporation. These alternatives offer different capacities or speeds. Verify pinout and electrical specifications before substitution.