71V3557S85BG

Memory IC Overview

The IDT71V3557S85BG is a synchronous ZBT SRAM IC with a 4.5 Mbit capacity organized as 128K x 36. It features an 8.5 ns access time and operates on a 3.3 V supply voltage ranging from 3.135 V to 3.465 V. The device utilizes a parallel interface and is housed in a 119-PBGA (14x22) package. It supports surface mount installation and functions within a commercial temperature range of 0°C to 70°C.

Memory IC Feature Summary

• Supports high-performance system speeds through Zero Bus Turnaround technology, eliminating dead cycles between write and read operations.
• Features internally synchronized output buffer enables that remove the requirement for external control signals during data transfer.

Memory IC Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in network routers and switches
• Data storage in industrial automation control systems

Memory IC Procurement Notes

Verify component authenticity due to discontinued status and potential availability of refurbished units. Confirm RoHS compliance requirements as original specifications may not meet current environmental standards. Validate package integrity upon receipt to ensure BGA solder joint quality remains uncompromised during storage.

Memory IC Selection Notes

Evaluate thermal management capabilities given the maximum supply current of 180 mA. Ensure PCB layout accommodates the 119-pin PBGA footprint dimensions accurately. Consider signal integrity requirements for parallel interfaces operating at specified clock frequencies within the target application environment.

Memory IC Part Context

This component belongs to the IDT 71V3557 family of synchronous ZBT SRAMs manufactured by Renesas Electronics Corporation following its acquisition of IDT. The series provides non-volatile-like performance with volatile memory characteristics, designed for applications requiring fast random access and low latency data handling in embedded systems.

Memory IC Replacement Considerations

IDT71V3557SA85BG serves as a verified substitute part number offering identical electrical specifications and pinout compatibility for direct replacement in existing designs without requiring schematic modifications.