71V2556S133PFG

Overview

The IDT 71V2556S133PFG is a 3.3V synchronous ZBT SRAM with a memory organization of 128K x 36 bits and a total density of approximately 4.5 Mbit. It operates at a maximum clock frequency of 133 MHz with a typical access time of 4.2 ns. The device utilizes a 100-pin TQFP package and features pipelined outputs with a burst counter. It supports single R/W control and individual byte write capabilities, designed to eliminate dead cycles between read and write operations.

Feature Summary

• Eliminates dead bus cycles during read-to-write or write-to-read transitions using Zero Bus Turnaround (ZBT) technology
• Features internally synchronized output buffer enable to remove the need for external Output Enable (OE) control
• Supports fully pipelined applications through positive clock-edge triggered address, data, and control signal registers

Applications

• High-performance system speed requirements in networking equipment
• Cache memory implementations in embedded systems
• Buffering applications in telecommunications infrastructure

Procurement Notes

Verify component authenticity as this part may be discontinued or superseded by newer revisions. Confirm that the specific suffix matches the required voltage and package specifications. Check for RoHS compliance status relative to manufacturing date. Ensure availability from authorized distributors to avoid counterfeit risks associated with legacy semiconductor components.

Selection Notes

Select this component when a 36-bit wide synchronous interface is required for high-speed data buffering. Compare against alternative ZBT SRAM families if lower power consumption or different I/O voltages are needed. Consider pin compatibility with existing PCB layouts if replacing older generations within the same product family.

Part Context

This device belongs to the IDT 71V2556S series of 3.3V Synchronous ZBT SRAMs. It shares architectural similarities with other members like the 71V2556SA and 71V2556S166, differing primarily in clock speed and specific I/O configurations. The series is characterized by its ability to handle high-bandwidth data transfers without performance penalties during bus turnaround events.