71V3557S85PFG8

Overview

The Renesas 71V3557S85PFG8 is a static random-access memory (SRAM) device organized as 4M bits, structured in 128K words by 36 bits. It operates with a maximum clock frequency of 87 MHz and features an access time of 8.5 ns. The component utilizes a parallel interface and supports 3.3V I/O levels. It is housed in a 100-pin LQFP package with dimensions of 14x14 mm. The supply voltage range is specified from 3.135V to 3.465V.

Feature Summary

• Synchronous Zero-Bus Turnaround (ZBT) architecture for high-speed data transfer
• Flow-through output mode enabling continuous read operations without wait states
• Asynchronous inputs synchronized to the rising edge of the clock signal

Applications

• High-performance embedded systems requiring fast local memory
• Industrial equipment control units
• Network infrastructure hardware

Procurement Notes

Verify the specific suffix 'I8' against the requested 'G8' variant, as industrial temperature ranges may differ. Confirm RoHS compliance status directly with the manufacturer or authorized distributor, as documentation indicates potential variations in environmental specifications across different production batches and suffixes. Ensure the package type matches the target PCB footprint requirements.

Selection Notes

Select this component when synchronous ZBT SRAM performance is required with a 36-bit data width. Compare against the 71V3557S80PFGI8 for faster 8ns access times if system timing permits. Verify that the 100-LQFP package is compatible with the assembly process and that the 3.3V I/O logic levels align with the host processor's voltage standards.

Part Context

This part belongs to the IDT/Renesas 71V3557 series of Synchronous ZBT SRAMs. These devices are designed to replace asynchronous SRAMs in high-speed applications. The series typically includes variants with different access speeds and package options, such as the 71V3557S80 and 71V3557S85 models, offering flexibility for various timing constraints.

Replacement Considerations

Publicly confirmed substitute part numbers include 71V547S100PFGI8 and IS61NLF12836A-7.5TQLI.