70261L25PFI

Memory IC Overview

The Renesas Electronics Corporation 70261L25PFI is a high-speed 16K x 16 Dual-Port Static RAM with a 256 kbit storage capacity. It operates on a single 5V power supply and features asynchronous parallel interfaces for both ports. The component supports simultaneous independent access to memory locations, utilizing built-in hardware semaphore signaling and port arbitration logic. It is housed in a 100-pin TQFP package and is designed for industrial temperature ranges.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from either port without conflict.
• On-chip hardware support for semaphore signaling and automatic port arbitration logic to manage data integrity during concurrent operations.
• Separate upper-byte and lower-byte control lines facilitate multiplexed bus compatibility and allow expansion of data bus width to 32 bits or more.

Memory IC Applications

• Stand-alone dual-port memory systems requiring high-speed data exchange between two processors.
• Master/Slave dual-port configurations for 32-bit or wider word systems.
• Industrial embedded applications requiring reliable asynchronous memory access within specified temperature ranges.

Memory IC Procurement Notes

Verify the specific suffix 'PFI' against official Renesas documentation to confirm package type and temperature grade. Ensure design compatibility with 5V TTL-compatible logic levels. Confirm moisture sensitivity level (MSL) handling requirements prior to assembly. Check for any product discontinuance notifications or lifecycle status updates directly from the manufacturer before finalizing procurement plans.

Memory IC Selection Notes

Select this component when true dual-port functionality with hardware arbitration is required for synchronous data sharing between two masters. It is suitable for designs needing simultaneous read/write access to shared memory without external arbitration controllers. Consider the 100-pin TQFP footprint and 5V operating voltage constraints during PCB layout and power supply design.

Memory IC Part Context

The 70261 series represents a family of high-speed dual-port SRAMs designed for complex data communication tasks. This specific model belongs to the 70261 line, which emphasizes hardware-based conflict resolution through semaphores. It serves as a bridge between different processing domains, allowing seamless data transfer in multi-processor environments without software overhead for bus management.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence carefully if considering alternative dual-port SRAMs, particularly regarding semaphore logic and pinout compatibility.