71V3556S166PFG8

Overview

The 71V3556S166PFG8 is a 4.5 Mbit synchronous static random access memory (SRAM) manufactured by Renesas Electronics Corporation. It features a parallel interface with an organization of 128K x 36 bits and supports clock frequencies up to 166 MHz. The device operates within a supply voltage range of 3.135 V to 3.465 V and is housed in a 100-TQFP package. Designed for zero bus turnaround (ZBT) applications, it eliminates dead cycles during read/write transitions.

Feature Summary

• Supports zero bus turnaround (ZBT) architecture to eliminate dead bus cycles between read and write operations
• Provides high-speed parallel data transfer capabilities suitable for demanding system interfaces
• Operates on a single 3.3 V power supply with specified voltage tolerance ranges

Applications

• High-performance embedded systems requiring fast data buffering
• Network infrastructure equipment utilizing parallel SRAM interfaces
• Industrial control systems needing reliable volatile memory storage

Procurement Notes

This component is officially discontinued and no longer manufactured by Renesas Electronics. Verification of availability should focus on authorized distributors holding remaining stock or approved substitute part numbers. Confirm end-of-life status through official product change notifications before procurement planning.

Selection Notes

Select this part only if legacy compatibility with the 128K x 36 parallel interface is required. Consider alternative ZBT SRAM devices from the same family that remain in production. Verify pinout and electrical specifications against current design requirements to ensure seamless integration without redesign.

Part Context

The 71V3556 series belongs to Renesas' line of 3.3 V CMOS synchronous SRAMs designed for high-speed data processing. These devices are engineered to improve system throughput by removing wait states associated with traditional SRAM architectures. The series supports various organizational configurations to meet diverse memory density needs.

Replacement Considerations

Officially documented similar substitutes include the 71V2546S100PFG. Verify functional equivalence and interface compatibility before replacement.