71V3577S85BGI

Overview

The IDT71V3577S85BGI is a high-speed synchronous SRAM organized as 128K x 36 bits, providing a total capacity of 4.5 Mbit. It operates with a 3.3V core supply and supports 3.3V I/O levels. The device features an 8.5 ns access time and a maximum clock frequency of 100 MHz. It utilizes a flow-through output architecture without registers in the data output path. The component is housed in a 119-pin PBGA package measuring 14 x 22 mm.

Feature Summary

• Supports burst mode operations with internal burst address counter for sequential data access
• Features self-timed write cycles controlled by global write control and byte write enables
• Provides flow-through outputs to eliminate pipeline latency

Applications

• High-performance cache memory systems
• Network infrastructure equipment
• Telecommunications base stations

Procurement Notes

Verify current availability status as this component may be subject to end-of-life notices or discontinuation. Confirm RoHS compliance requirements against specific project standards, as older batches may not meet current environmental regulations. Ensure the 119-pin BGA footprint matches the target PCB layout design constraints.

Selection Notes

Select this part when a 128K x 36 organization is required for wide-data bus applications. Choose the S85 speed grade for systems needing 100 MHz operation. Consider the PBGA package for high-density surface mount assembly. Verify that the synchronous interface and flow-through architecture align with the system controller's timing capabilities.

Part Context

This component belongs to the IDT 71V3577 family of 3.3V synchronous SRAMs. The family includes variants with different access times and package options, such as TQFP and fpBGA. The 'S' suffix typically denotes synchronous operation, while 'BGI' indicates the specific 119-pin BGA package variant with industrial temperature range support.

Replacement Considerations

Check for direct pin-compatible replacements within the same 71V3577 series, such as the IDT71V3577S75BGI for faster speeds. Verify electrical compatibility with other 3.3V synchronous SRAMs from Renesas or IDT offering identical 128K x 36 organization and 119-pin BGA packaging.