70261L20PFGI

Memory IC Overview

The Renesas 70261L20PFGI is a high-speed 256 kbit (16K x 16) dual-port static RAM featuring asynchronous parallel interfaces. It operates on a single 5V supply within a voltage range of 4.5V to 5.5V, with a maximum access time of 20 ns and peak current consumption of 240 mA. The device supports simultaneous independent access to memory locations via separate upper-byte and lower-byte controls for multiplexed bus compatibility. It is housed in a 100-pin TQFP package suitable for surface mount installation and functions reliably across an industrial temperature range from -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by both ports.
• Integrated hardware support for semaphore signaling and port arbitration logic to manage data conflicts between masters and slaves.
• Automatic power-down functionality controlled by chip enable signals to achieve very low standby power modes.
• TTL-compatible operation with separate byte control lines facilitating easy expansion of data bus width to 32 bits or more.

Memory IC Applications

• Stand-alone dual-port memory systems requiring high-speed data buffering.
• Master/slave dual-port configurations for 32-bit or wider word systems.
• Industrial control applications operating within extended temperature environments.
• Network equipment requiring reliable asynchronous data transfer between processors.

Memory IC Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'PFGI' matches the required 100-pin TQFP package and industrial temperature grade. Check for moisture sensitivity level compliance during storage and handling. Ensure the ordering documentation explicitly states the 20 ns access speed variant. Validate RoHS compliance status against current regulatory requirements before finalizing procurement orders.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is critical for system performance. The 16-bit word width and 20 ns speed suit applications needing fast asynchronous communication without complex synchronization protocols. Consider the 100-pin TQFP footprint for PCB layout constraints. Evaluate the need for built-in arbitration features if multiple masters share the memory resource. Compare power consumption metrics against alternative SRAM families for battery-sensitive designs.

Memory IC Part Context

This part belongs to the 70261 series of dual-port SRAMs, designed for high-reliability data exchange. It serves as a bridge between different processing domains, allowing seamless data sharing without external arbitration circuitry. The series emphasizes robustness in industrial settings, offering consistent performance across wide temperature ranges. It complements other Renesas memory solutions by providing dedicated dual-port capabilities for specialized networking and control tasks.

Memory IC Replacement Considerations

The discontinued 70261S35PFI8 is listed as an obsolete predecessor. Verify electrical compatibility regarding access times and pinouts before substituting. Ensure the replacement maintains the same 16K x 16 organization and 5V supply requirements. Confirm package dimensions match the existing PCB footprint to avoid mechanical interference during assembly.