71V3577S85PFGI

Overview

The Renesas Electronics 71V3577S85PFGI is a 4.5 Mbit Synchronous Single Data Rate (SDR) Static Random Access Memory (SRAM). It features a memory organization of 128K x 36 bits and utilizes a parallel interface. The component supports a maximum clock frequency of 87 MHz with an access time of 8.5 ns. It operates on a 3.3V power supply, with voltage limits ranging from 3.135V to 3.465V. The device is housed in a 100-pin TQFP surface-mount package and is rated for an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Supports synchronous burst mode operations with selectable interleaved or linear modes via the LBO input.
• Features self-timed write cycles controlled by global write control (GW), byte write enable (BWE), and byte writes (BWx).
• Includes optional boundary scan JTAG interface compliant with IEEE 1149.1 standards.

Applications

• High-performance embedded systems requiring fast data buffering.
• Network infrastructure equipment utilizing flow-through SRAM architectures.
• Industrial control applications necessitating wide bus width and synchronous timing.

Procurement Notes

Verify current availability status as this component may be subject to end-of-life restrictions. Confirm RoHS compliance requirements against specific project standards, noting that some variants in this series have reported non-compliance. Ensure the 100-pin TQFP footprint matches the target PCB design. Validate thermal management capabilities for the specified industrial temperature range during system integration.

Selection Notes

Select this part when a 36-bit data path is required for synchronous processing. Compare against the 71V3577S85BG8 if a BGA package is preferred over TQFP. Consider the 71V3579 if a 18-bit width suffices. Verify that the 8.5 ns access time meets the system clock requirements. Check for alternative packages within the 71V3577 family if lead-free soldering processes are mandatory.

Part Context

This component belongs to the Renesas 71V3577S85 family of 3.3V CMOS SRAMs. It shares architectural similarities with other members like the 71V3577S85BG8 but differs in packaging. The series is characterized by high-speed synchronous operation and flow-through output options. It serves as a legacy solution for designs requiring wide data buses and deterministic latency in 3.3V environments.

Replacement Considerations

Public confirmed substitute part numbers include IDT71V3577S85PFGI8. Verify pinout compatibility and electrical specifications before substitution. Note that the original manufacturer may have discontinued production, requiring validation of long-term supply stability for new implementations.