70261S55PFI8/2703

Memory IC Overview

The 70261S55PFI8 is a dual-port static random-access memory integrated circuit manufactured by Renesas Electronics. It features a storage capacity of 256 kbit organized as 16K x 16 words. The device supports asynchronous parallel interface with a maximum access time of 55 ns. It operates on a single 4.5V to 5.5V power supply and functions within an industrial temperature range of -40°C to +85°C. The component is housed in a 100-pin TQFP surface-mount package.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from both ports.
• Integrated hardware support for semaphore signaling and port arbitration logic to manage data conflicts between ports.
• Automatic power-down feature controlled by chip enable signals, allowing on-chip circuitry to enter low standby power mode.
• Separate upper-byte and lower-byte control lines designed for compatibility with multiplexed bus systems.

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 in industrial control applications

Memory IC Procurement Notes

Verify RoHS compliance status carefully, as specific suffixes may indicate non-compliant variants. Confirm moisture sensitivity level (MSL 3) requirements for reflow soldering profiles. Check current production status, as this part number may be discontinued or subject to limited availability. Ensure the selected package matches the 100-TQFP footprint specifications for PCB layout compatibility.

Memory IC Selection Notes

Select this component when true dual-port functionality with hardware arbitration is required for high-speed data exchange. Consider the 55 ns access speed against system timing constraints. Verify that the 100-pin TQFP package fits the available board space. Ensure the design accommodates the separate byte control signals if interfacing with multiplexed buses.

Memory IC Part Context

This component belongs to the 70261 series of high-speed dual-port SRAMs. The series offers various access times and packaging options to suit different performance and form-factor requirements. The 70261 family is designed for applications requiring concurrent read/write operations from two independent processors or controllers without external arbitration overhead.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for end-of-life notifications or recommended upgrades if this specific variant is discontinued.