71V3556S133PFG8

Memory IC Overview

The Renesas Electronics Corporation 71V3556S133PFG8 is a 4.5 Mbit synchronous static random-access memory (SRAM) organized as 128K x 36 bits. It operates with a maximum clock frequency of 133 MHz and features an access time of 4.2 ns. The device utilizes a parallel interface and requires a supply voltage between 3.135 V and 3.465 V. It is housed in a 100-TQFP package with dimensions of 14x14 mm. The component supports surface mount installation and functions within a commercial temperature range of 0°C to 70°C.

Memory IC Feature Summary

• Zero Bus Turnaround (ZBT) architecture eliminates dead cycles during bus turnaround between read and write operations.
• Internally synchronized output buffer enable removes the requirement for external Output Enable (OE) control.
• Single Read/Write control pin simplifies interface logic design.
• Positive clock-edge triggered address, data, and control signal registers support fully pipelined applications.

Memory IC Applications

• High-performance processor secondary cache systems
• Network router and switch buffering
• Telecommunications equipment data storage
• Industrial control system memory

Memory IC Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeit risks. Confirm RoHS compliance status as specific listings indicate non-compliance. Check for End-of-Life (EOL) notices and Production Change Notices (PCN) regarding substrate or labeling updates. Ensure compatibility with existing PCB footprints and moisture sensitivity levels before procurement.

Memory IC Selection Notes

Select this component for designs requiring high-speed synchronous memory with ZBT technology to maximize bus efficiency. Verify that the 100-TQFP package fits the available board space and thermal constraints. Ensure the system power supply maintains the required 3.3V ±5% tolerance. Consider the 0°C to 70°C operating range against environmental conditions. Evaluate alternative packages if higher density or industrial temperature ranges are needed.

Memory IC Part Context

This part belongs to the 71V3556 family of 3.3V CMOS synchronous SRAMs. It shares architectural similarities with other members like the 71V3556SA and 71V3558 series, differing primarily in speed grades, organization, and package types. The family is designed for applications demanding low latency and high throughput without complex control overhead.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers were not identified in the provided documentation. Consult official Renesas resources for current obsolescence management and recommended replacement strategies.