71V3579S85PFG8

Overview

The 71V3579S85PFG8 is a 4.5Mb (256K x 18) synchronous SDR SRAM manufactured by Renesas Electronics Corporation. It operates with an access time of 8.5 ns and supports clock frequencies up to 87 MHz. The device utilizes a parallel interface and functions within a supply voltage range of 3.135V to 3.465V. It is housed in a 100-TQFP (14x14) surface-mount package and is rated for operation between 0°C and 70°C.

Feature Summary

• Supports burst mode operations including interleaved or linear modes selectable via the LBO input.
• Features self-timed write cycles controlled by global write control, byte write enable, and individual byte writes.
• Includes power-down functionality managed by the ZZ input pin.

Applications

• High-performance computing systems requiring fast data buffering
• Network infrastructure equipment utilizing synchronous memory interfaces
• Industrial control applications needing reliable volatile storage

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm RoHS compliance status and moisture sensitivity level requirements before procurement. Ensure the specific suffix matches the required packaging format. Check for any recent product change notifications regarding substrate or labeling updates.

Selection Notes

Select this component when a 256K x 18 organization with synchronous flow-through output is required. Ensure the system design accommodates the 3.3V I/O levels and the specified operating temperature range. Verify that the 100-pin TQFP footprint fits the PCB layout constraints and thermal management requirements.

Part Context

This device belongs to the 71V3579 family of 3.3V CMOS SRAMs. It shares architectural similarities with other members like the 71V3577 but differs in density and organization. The family is designed for high-speed parallel data processing tasks where low latency and predictable timing are critical for system performance.

Replacement Considerations

Publicly confirmed substitute part numbers include IS61LF25618A-7.5TQLI and IS61LF25618EC-7.5TQLI from ISSI. These alternatives offer similar specifications and should be evaluated for pin compatibility and electrical characteristics before integration.