71V3556S166PFGI

Overview

The IDT71V3556S166PFGI is a synchronous Single Data Rate (SDR) Zero Bus Turnaround (ZBT) Static Random Access Memory (SRAM) manufactured by Renesas Electronics Corporation. It features a storage capacity of 4.5 Mbit organized as 128K x 36 bits. The device supports a maximum clock frequency of 166 MHz with an access time of 3.5 ns. It operates within a supply voltage range of 3.135 V to 3.465 V and is rated for an industrial temperature range of -40°C to +85°C. The component utilizes a parallel interface and is housed in a 100-pin Thin Quad Flat Package (TQFP) measuring 14x14 mm.

Feature Summary

• Eliminates dead bus cycles during read-to-write or write-to-read transitions via Zero Bus Turnaround technology.
• Supports high-speed data transfer through synchronous operation at frequencies up to 166 MHz.
• Provides reliable data retention using volatile SRAM architecture with pipelined burst capabilities.

Applications

• High-performance embedded systems requiring fast memory access
• Industrial equipment control units
• Network infrastructure hardware

Procurement Notes

Verify the specific suffix PFGI to confirm the 100-TQFP package and industrial temperature rating, as other variants exist within the 71V3556 family. Confirm RoHS compliance status, as older production runs may differ from current specifications. Check for End-of-Life notices, as this component series has faced discontinuation announcements. Ensure compatibility with existing PCB footprints before procurement.

Selection Notes

Select this part when a 128K x 36 organization is required for wide data buses. Choose the SDR ZBT variant over asynchronous options for higher throughput in clocked systems. Verify that the 3.3V core voltage aligns with the system power design. Consider the TQFP package constraints if board space is limited compared to BGA alternatives.

Part Context

This component belongs to the IDT 71V3556/58 family of synchronous SRAMs. It shares architectural similarities with other members like the 71V3556S166BQGI but differs in package type and pinout. The family is designed for applications demanding low latency and high bandwidth without the complexity of DRAM refresh cycles.

Replacement Considerations

• 71V3556S166PFG

FAQ

What is the difference between the 71V3556 and 71V3558 models?

The 71V3556 is organized as 128K x 36 bits, while the 71V3558 is organized as 256K x 18 bits. Both offer similar performance characteristics and interfaces.

Does this SRAM support pipelined burst mode?

Yes, the 71V3556 series supports pipelined burst operations to maximize data throughput during sequential accesses.