70261S55PFG

Memory IC Overview

The Renesas Electronics Corporation 70261S55PFG is a high-speed 16K x 16 Dual-Port Static RAM designed for standalone or master/slave configurations in 32-bit systems. It features true dual-ported memory cells allowing simultaneous access to the same location, separate upper-byte and lower-byte control for multiplexed bus compatibility, and on-chip port arbitration logic with semaphore signaling. The device operates asynchronously from either port with TTL-compatible single 5V power supply. It includes busy and interrupt flags and an automatic power-down feature controlled by CE for low standby power. The component is housed in a 100-pin TQFP package.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations from two distinct ports.
• Integrated hardware support for semaphore signaling and port arbitration logic to manage concurrent data access conflicts.
• Separate byte control mechanisms facilitating compatibility with multiplexed bus systems and expanded data width configurations.

Memory IC Applications

• Standalone dual-port random access memory modules
• Master/slave dual-port RAM combinations for 32-bit or wider word systems
• High-speed asynchronous data buffering applications

Memory IC Procurement Notes

Verify the specific suffix PFG against official datasheets to confirm the 100-pin TQFP package and commercial temperature range specifications. Confirm RoHS compliance status as indicated in current manufacturer documentation. Check for any product change notices regarding lead-free material declarations or assembly location updates before finalizing procurement orders.

Memory IC Selection Notes

Select this component when simultaneous bidirectional access to shared memory is required without external arbitration circuitry. Ensure system voltage requirements align with the specified 4.5V to 5.5V operating range. Consider the 55 ns access time relative to system clock speeds and verify that the 100-pin TQFP footprint matches the target PCB layout constraints.

Memory IC Part Context

This part belongs to the 70261 series of dual-port SRAMs manufactured by Renesas Electronics. The series offers various speed grades and packaging options to suit different performance and form factor requirements. The 70261S55PFG specifically denotes the 55 nanosecond access time variant within the commercial temperature grade subset of this family.

Memory IC Replacement Considerations

Officially documented substitute part numbers are not available in the provided source material. Verify cross-compatibility with other 70261 series variants only if pinout and electrical characteristics match exactly.