70261L55PF8

Memory IC Overview

The Renesas Electronics Corporation 70261L55PF8 is a high-speed, 256Kb (16K x 16) dual-port static random-access memory. It features asynchronous parallel interfaces with a maximum access time of 55 ns. The device operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. It is housed in a 100-pin TQFP surface-mount package and supports commercial operating temperatures from 0°C to 70°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by both ports.
• On-chip hardware support for semaphore signaling and port arbitration logic to manage concurrent data transfers.
• Separate upper-byte and lower-byte control lines designed for multiplexed bus compatibility.
• Automatic power-down feature controlled by chip enable signals to achieve low standby power consumption.

Memory IC Applications

• Stand-alone dual-port RAM applications requiring independent read/write operations.
• Master/Slave dual-port configurations for 32-bit or wider word systems.
• High-speed data buffering in telecommunications equipment.
• Network switch memory buffers requiring low-latency access.

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to potential counterfeit risks. Confirm RoHS compliance status as older variants may not meet current environmental standards. Check moisture sensitivity level handling requirements during assembly. Validate package integrity against shipping damage. Ensure design-in compatibility with existing system voltage levels before procurement.

Memory IC Selection Notes

Select this component when simultaneous independent access to shared memory is required without external arbitration logic. Consider the 55 ns access speed for moderate throughput needs. Evaluate the 100-pin TQFP footprint against available PCB space. Compare power consumption characteristics against other dual-port SRAM options for efficiency requirements.

Memory IC Part Context

The 70261 series represents a family of high-performance dual-port SRAMs designed for complex digital signal processing and networking applications. This specific model belongs to the L-series, indicating commercial temperature grading. The part integrates advanced arbitration logic to simplify system design compared to standard single-port memories.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-compatibility with newer generations of dual-port SRAMs if this specific variant is discontinued.