70261L55PF

Memory IC Overview

The Renesas Electronics Corporation 70261L55PF is a high-speed, 256Kbit (16K x 16) dual-port static random-access memory (SRAM). It features asynchronous parallel interface operation with a maximum access time of 55 ns. The device operates on a single 5V power supply within the 4.5V to 5.5V range and supports surface-mount installation in a 100-pin TQFP package. It includes automatic power-down capabilities controlled by chip enable signals.

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 and port arbitration logic to manage concurrent data transfers.
• Separate upper-byte and lower-byte control lines designed for multiplexed bus compatibility and flexible data width expansion.

Memory IC Applications

• Stand-alone dual-port RAM configurations in embedded systems.
• Master/Slave dual-port RAM combinations for 32-bit or wider word systems.
• High-speed data buffering between asynchronous processors.

Memory IC Procurement Notes

Verify component authenticity through authorized channels as this series may have legacy status. Confirm RoHS compliance and moisture sensitivity levels prior to assembly. Check for specific suffix variations that may indicate temperature grade or packaging differences. Ensure design-in documentation matches the exact pinout and electrical specifications required for the target application.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration overhead. The 55 ns speed suits moderate-frequency applications where cost-effective SRAM is preferred over faster alternatives. Ensure the system design accommodates the 100-pin TQFP footprint and provides adequate thermal management for the specified operating temperature range.

Memory IC Part Context

The 70261L55PF belongs to the Renesas 70261 family of dual-port SRAMs. This family is characterized by its ability to function as either standalone memory or in master/slave pairs. The 'L' suffix typically denotes commercial temperature range variants, while the '55' indicates the 55 nanosecond access time specification common across the series.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify compatibility with existing designs if considering alternative dual-port SRAM families.