71V3556S100PFG

Memory IC Overview

The IDT71V3556S100PFG is a ZBT SRAM with a memory organization of 128K x 36 and a total density of 4.5 Mbit. It operates at a maximum clock frequency of 100 MHz with a longest access time of 5 ns. The device utilizes a 100-pin TQFP package (14x20 mm) and supports 3.3V I/O levels. It features synchronous operation, common I/O type, and 3-state output characteristics.

Memory IC Feature Summary

• Supports high-performance system speeds through synchronous ZBT architecture
• Eliminates dead cycles between write and read operations
• Features internally synchronized output buffer enable to simplify control logic

Memory IC Applications

• High-speed data buffering in communication systems
• Cache memory applications in embedded processors
• FIFO buffers in network switching equipment

Memory IC Procurement Notes

Verify the specific suffix 'I8' if industrial temperature range (-40°C to 85°C) is required, as the base part may denote commercial range. Confirm RoHS compliance status and check for End-of-Life notices from Renesas Electronics Corporation, which acquired IDT's memory business. Ensure the 100-TQFP footprint matches the target PCB design constraints.

Memory IC Selection Notes

Select this component when a 128K x 36 configuration is necessary for wide-data bus interfaces. The 100 MHz speed grade suits applications requiring moderate latency without the complexity of asynchronous timing. Compare against the XS series if faster access times below 5 ns are needed, or consider the SA/XSA variants for different pinout or power optimizations.

Memory IC Part Context

This device belongs to the IDT 71V3556 family of 3.3V Synchronous ZBT SRAMs. It shares architectural similarities with the 71V3558 series but differs in data width (36-bit vs 18-bit). The family is characterized by its pipelined outputs and burst capability, designed to interface directly with high-speed microprocessors and DSPs.

Memory IC Replacement Considerations

Public confirmed substitute: 71V547S100PFGI8.