71V2546S150PFG8

Overview

The IDT71V2546S150PFG8 is a 4.5 Mbit synchronous single data rate zero bus turnaround SRAM manufactured by Renesas Electronics Corporation. It features a parallel interface with a memory organization of 128K x 36 bits. The device supports a clock frequency of 150 MHz and offers an access time of 3.8 ns. It operates on a supply voltage range of 4.5 V to 5.5 V and is housed in a 100-TQFP (14x14) surface-mount package. The component is designed for high-speed data buffering applications requiring fast read/write cycles.

Feature Summary

• Zero Bus Turnaround (ZBT) technology eliminates dead bus cycles during read-to-write or write-to-read transitions, maximizing throughput efficiency.
• Synchronous Single Data Rate architecture ensures precise timing alignment through a dedicated clock input for predictable system performance.
• High-speed pipelined operation allows for continuous data processing at frequencies up to 150 MHz without pipeline stalls.

Applications

• High-performance network routers and switches requiring rapid packet buffering
• Telecommunications base stations needing low-latency signal processing memory
• Industrial automation controllers utilizing fast data acquisition systems

Procurement Notes

Verify the specific suffix 'XS' versus 'S' when sourcing replacements, as voltage ranges may differ between 3.3V and 5V variants. Confirm RoHS compliance status as older batches may not meet current environmental standards. Check for end-of-life notices from Renesas, as this part number has been subject to discontinuation announcements. Ensure the 100-TQFP package dimensions match your PCB footprint requirements before finalizing orders.

Selection Notes

Select this component when system design requires a 36-bit wide data path with synchronous timing constraints. It is suitable for designs operating within the 4.5V to 5.5V power domain. Engineers should consider the 150 MHz speed grade if higher latency is unacceptable. Compare against the 100 MHz variant if lower power consumption is prioritized over maximum bandwidth. Verify that the 100-pin TQFP package fits the available board space.

Part Context

This device belongs to the IDT 71V2546 family of synchronous ZBT SRAMs. It shares architectural similarities with other members like the 71V2546S100 but differs in speed grade and voltage specifications. The family is widely used in embedded systems where deterministic memory access times are critical. It serves as a bridge between high-speed processors and slower peripheral buses.

Replacement Considerations

The 71V2546S150PFG is a pin-compatible alternative with tray packaging instead of tape and reel. The 71V2546S133PFG offers a slightly lower speed grade of 133 MHz. Verify voltage compatibility carefully, as some family members operate at 3.3V rather than 5V.