70261S12PFI8

Memory IC Overview

The Renesas Electronics Corporation 70261S12PFI8 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, with separate upper-byte and lower-byte control for multiplexed bus compatibility. The device includes busy and interrupt flags, on-chip port arbitration logic, and full hardware support for semaphore signaling between ports. It operates asynchronously from either port using a TTL-compatible single 5V power supply and is available in a 100-pin TQFP package.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations by two distinct ports.
• Integrated on-chip hardware support for semaphore signaling and port arbitration logic to manage concurrent data transfers.
• Built-in busy and interrupt flags provide status monitoring and notification capabilities for system synchronization.
• Automatic power-down feature controlled by chip enable signals allows low standby power consumption modes.

Memory IC Applications

• Standalone dual-port memory applications requiring high-speed asynchronous data exchange.
• Master/slave dual-port RAM configurations for expanding data bus widths to 32 bits or more.
• Systems requiring hardware-based semaphore signaling for efficient inter-port communication.

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to obsolescence notices. Confirm moisture sensitivity level (MSL) and reflow soldering profiles prior to assembly. Check for specific RoHS compliance documentation relevant to the manufacturing date code. Ensure proper ESD handling procedures are followed during storage and installation due to semiconductor sensitivity.

Memory IC Selection Notes

Select this component when simultaneous bidirectional access to a common memory block is required without external arbitration overhead. Consider the 100-pin TQFP package constraints for PCB layout. Evaluate the need for internal semaphore logic versus external software management. Verify that the 5V TTL interface matches the host system voltage levels. Assess thermal requirements for the operating temperature range specified in the datasheet.

Memory IC Part Context

This component belongs to the 70261 series of dual-port SRAMs, which are engineered for high-performance embedded applications. The series supports various access times and packaging options to suit different speed and form factor requirements. These devices are commonly utilized in telecommunications, networking equipment, and industrial control systems where reliable parallel data processing is critical.

Memory IC Replacement Considerations

Check for direct pin-to-pin replacements within the 70261 family such as 70261L12PFI8 or 70261S12PFGI, ensuring access time and package type match. Verify if newer revisions offer improved power characteristics or updated environmental compliance. Consult manufacturer PCNs for any functional changes in successor parts.