71V3556S166PFG

Overview

The IDT71V3556S166PFG is a 4.5 Mbit synchronous ZBT SRAM organized as 256K x 18, operating at a maximum clock frequency of 166 MHz with a 3.5 ns access time. It utilizes a 100-pin TQFP surface-mount package and supports a supply voltage range of 3.135 V to 3.465 V. The device features pipelined outputs and a single R/W control pin for fully pipelined applications.

Feature Summary

• Eliminates dead bus cycles during read-to-write or write-to-read transitions
• Internally synchronized output buffer enable removes external OE control requirements
• Supports four-word burst capability in interleaved or linear modes

Applications

• High-performance system memory buffering
• Network equipment data storage
• Industrial control systems requiring fast turnaround times

Procurement Notes

Verify the exact suffix against official Renesas documentation, as variations exist between PFG and PFGI packages. Confirm current availability status, as this component may be subject to discontinuation notices. Ensure compatibility with existing PCB footprints and thermal management requirements before procurement.

Selection Notes

Select this part when low-latency turnaround between read and write operations is critical. The 166 MHz speed grade suits high-bandwidth applications. Verify that the 100-pin TQFP package fits the design constraints and that the 3.3V core voltage aligns with the system power architecture.

Part Context

This component belongs to the IDT 71V3556 family of synchronous ZBT SRAMs. These devices are designed for high-speed parallel interface applications where minimal latency is required. The family typically includes variants with different speeds and package options to support diverse system integration needs.

Replacement Considerations

Consult official Renesas documentation for verified substitutes such as the 71V3556SA166PFG or other speed-grade variants within the same family. Ensure functional equivalence regarding organization and interface timing before substitution.