70261S15PF8

Memory IC Overview

The Renesas Electronics Corporation 70261S15PF8 is a high-speed 256Kbit (16K x 16) dual-port static random-access memory. It features asynchronous parallel interface with 15 ns access time and operates on a single 4.5V to 5.5V power supply. The component utilizes a 100-pin TQFP surface-mount package. It supports simultaneous independent access by two processors, includes hardware semaphore signaling for port arbitration, and offers automatic power-down modes controlled by chip enable inputs.

Memory IC Feature Summary

• True dual-ported architecture enabling simultaneous independent access to the same memory location by two separate ports
• On-chip hardware support for semaphore signaling and port arbitration logic to manage concurrent data access
• Automatic low standby power mode activated via chip enable control to reduce power consumption during idle states

Memory IC Applications

• Stand-alone dual-port memory systems requiring independent processor access
• Master/Slave dual-port configurations for expanding data bus width in 32-bit or larger word systems
• High-speed data buffering applications involving concurrent read/write operations from multiple sources

Memory IC Procurement Notes

This component is officially classified as obsolete and no longer manufactured by Renesas Electronics Corporation. Verification of availability should focus exclusively on surplus distributors or secondary market suppliers. Buyers must confirm the specific revision level and physical condition of existing stock, as original packaging may vary. Cross-referencing part number aliases such as IDT70261S15PF8 is recommended when searching for legacy inventory.

Memory IC Selection Notes

Select this component only if the design requires a 16K x 16 organization with 15 ns access speed in a 100-pin TQFP package. Ensure the system voltage aligns with the 4.5V to 5.5V operating range. Verify that the application can accommodate the end-of-life status and potential supply constraints associated with obsolete memory devices. Consider alternative modern dual-port SRAMs if long-term production stability is required.

Memory IC Part Context

The 70261 series represents a family of high-speed dual-port SRAMs designed for complex embedded systems. This specific model belongs to the S-series, indicating commercial temperature range operation. It shares architectural similarities with other variants like the 70261L20PFI8 but differs in speed grade and temperature rating. The device integrates standard TTL-compatible I/O levels for easy interfacing with microprocessors.

Memory IC Replacement Considerations

Renesas recommends the 70261L15PFG8 as an upgrade replacement. This alternative offers similar electrical characteristics but complies with RoHS standards and provides industrial temperature range capability. Designers should verify pin compatibility and software compatibility before transitioning to the L-series variant.