70261S55PF

Memory IC Overview

The 70261S55PF is a high-speed 256Kbit (16K x 16) dual-port static random-access memory manufactured by Renesas Electronics. It features asynchronous parallel interface with 55 ns access time and operates on a single 5V power supply within the industrial temperature range of -40°C to +85°C. The device is housed in a 100-pin TQFP package.

Memory IC Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location from both ports.
• On-chip hardware support for semaphore signaling, busy flags, and interrupt flags to manage port arbitration.
• Separate upper-byte and lower-byte control lines designed for multiplexed bus compatibility.

Memory IC Applications

• Stand-alone dual-port RAM applications requiring independent data access.
• Master/Slave dual-port RAM configurations for 32-bit or wider word systems.
• High-speed data buffering in industrial embedded systems.

Memory IC Procurement Notes

Verify component authenticity through authorized channels as this part may be obsolete. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Review official datasheets for lead-free packaging specifications and handling requirements to ensure manufacturing integrity.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration logic. Ensure system voltage matches the 5V specification and verify that the 100-pin TQFP footprint aligns with the PCB layout design constraints.

Memory IC Part Context

This device belongs to the 70261 series of dual-port SRAMs, offering varying access speeds. It provides a robust solution for applications needing high-speed memory sharing between two processors or controllers while maintaining data integrity through built-in synchronization mechanisms.

Memory IC Replacement Considerations

Consult manufacturer documentation for direct upgrades such as the 70261L25PFG. Verify pinout compatibility and electrical characteristics before substituting to ensure system functionality remains intact.