71V2546S150PFG

Overview

The IDT71V2546S150PFG is a 3.3V Synchronous Zero Bus Turnaround (ZBT) SRAM with a memory organization of 128K x 36, providing a total capacity of 4.5 Mbit. It operates at a maximum clock frequency of 150 MHz with a 3.8 ns clock-to-data access time. The device utilizes a 3.3V power supply and supports 2.5V I/O levels. It is housed in a 100-pin plastic thin quad flatpack (TQFP) package.

Feature Summary

• Zero bus turnaround technology eliminates dead cycles between read and write operations
• Fully pipelined architecture with positive clock-edge triggered registers
• Single R/W control pin simplifies interface logic
• Supports four-word burst capabilities in interleaved or linear modes

Applications

• High-performance system speed applications requiring fast data throughput
• Systems needing simple depth expansion via multiple chip enables
• Applications utilizing individual byte write control for data masking

Procurement Notes

Verify the specific suffix 'PFG' to confirm the 100-pin TQFP package type and lead-free status. Confirm the 'S' variant designation aligns with the required 2.5V I/O voltage level. Check current availability as this component family may be subject to discontinuation notices from Renesas Electronics. Ensure compatibility with existing board layouts for the specified package dimensions.

Selection Notes

Select this part when system requirements demand high-speed synchronous memory with minimal bus turnaround latency. The 128K x 36 configuration suits wide data path applications. Verify that the 3.3V core voltage and 2.5V I/O supply meet the target platform's power constraints. Consider the 100-pin TQFP package if surface mount assembly with standard footprints is preferred over BGA options.

Part Context

This component belongs to the IDT 71V2546S series of Synchronous ZBT SRAMs. These devices are designed to eliminate dead bus cycles during bus turnaround. The series includes variants with different speeds and packages, such as the 100MHz and 133MHz versions. The manufacturer has transitioned to Renesas Electronics, which continues production under updated part numbering conventions.

Replacement Considerations

IDT71V2546S133PFG

FAQ

What is the function of the ZBT feature?

ZBT technology allows the device to switch between read and write cycles without inserting dead bus cycles, improving overall system performance.

How is byte-level data controlled?

The device provides individual byte write control pins (BW1-BW4) to mask specific bytes during write operations.