IDT71V3579S85PF8

Memory IC Overview

The IDT71V3579S85PF8 is a high-speed synchronous SDR SRAM organized as 256K x 18, providing a total capacity of 4.5Mb. It features a flow-through architecture with parallel interface and supports clock frequencies up to 87 MHz with an access time of 8.5 ns. The device operates on a 3.3V core and I/O supply voltage (3.135V to 3.465V) and is housed in a 100-pin TQFP package.

Memory IC Feature Summary

• Supports fast access times up to 87 MHz with 8.5 ns delay
• Features self-timed write cycles with global write control and byte write enable
• Includes LBO input for selecting interleaved or linear burst modes
• Provides power down functionality controlled by the ZZ input

Memory IC Applications

• High-performance cache memory systems
• Network routing and switching equipment
• Telecommunications infrastructure
• Industrial automation controllers

Memory IC Procurement Notes

Verify the specific suffix 'PF8' against official Renesas documentation to confirm package type and temperature grade. Confirm RoHS compliance status as historical data indicates potential non-compliance for older batches. Ensure the component source matches the manufacturer's authorized distribution channels to avoid counterfeit parts.

Memory IC Selection Notes

Select this component when a 256K x 18 synchronous SRAM with flow-through output is required. It is suitable for designs needing 3.3V operation and single-cycle deselect capabilities. Consider the 100-TQFP package constraints and ensure the system supports the necessary synchronous control signals like CLK, CE, and CS.

Memory IC Part Context

This part belongs to the IDT71V3577/79 family of 3.3V synchronous SRAMs. The '79' designation specifically denotes the 256K x 18 configuration, distinguishing it from the 128K x 36 variant. The 'S' suffix typically indicates commercial temperature range availability within the broader product line.

Memory IC Replacement Considerations

• IDT71V3579S85PFI

Memory IC FAQ

What is the difference between the IDT71V3577 and IDT71V3579?

The IDT71V3577 is organized as 128K x 36, while the IDT71V3579 is organized as 256K x 18. Both share similar electrical characteristics and pinouts.

How does the LBO input affect burst mode?

The LBO input selects between interleaved and linear burst sequences. When LBO is HIGH, the interleaved sequence is selected; when LOW, the linear sequence is selected.