70T651S12BCI

Memory IC Overview

The Renesas Electronics Corporation 70T651S12BCI is a high-speed asynchronous dual-port static random-access memory (SRAM) device. It features a storage organization of 256K x 36 bits, providing a total capacity of 9 Mbit. The component operates with a maximum access time of 12 ns and requires a single 2.5 V power supply for the core, with selectable I/O voltage levels of 3.3 V or 2.5 V. It is housed in a 256-ball CABGA package and supports an industrial operating temperature range from -40°C to +85°C.

Memory IC Feature Summary

• Dual-port architecture enables simultaneous independent access to shared memory locations by two separate processors without external arbitration logic.
• Integrated hardware semaphore signaling and port arbitration logic facilitate efficient data exchange and synchronization between ports.
• Supports depth expansion through dual-chip enable functionality and allows data bus width expansion to 72 bits or more via master/slave cascading.

Memory IC Applications

• High-performance computing systems requiring fast data buffering
• Network routers and switches utilizing interleaved I/O structures
• Telecommunications equipment needing low-latency memory interfaces

Memory IC Procurement Notes

This component has been officially discontinued by the manufacturer. Production ended on January 3, 2024, as indicated in the Product Discontinuance Notification. Current availability is limited to existing stock held by distributors or third-party suppliers. Buyers must verify the authenticity and condition of available units carefully, as no new manufacturing occurs. Supply chain planning should account for the lack of future production support.

Memory IC Selection Notes

Engineers selecting this part must consider its end-of-life status when designing long-term products. The device requires careful attention to its specific power supply requirements, including separate core and I/O voltages. Designers should evaluate alternative components that offer similar dual-port capabilities and pin compatibility if future production stability is required. Verification of the specific suffix 'BCI' ensures the correct package type and speed grade are matched to the application needs.

Memory IC Part Context

The 70T651 series belongs to Renesas Electronics' portfolio of high-speed asynchronous dual-port SRAMs. These devices are designed for applications demanding rapid data transfer and concurrent access. The 70T651S12BCI specifically represents the 12 ns speed grade within the 256K x 36 configuration family, offering a balance of density and performance for complex system architectures.

Memory IC Replacement Considerations

The 70T651S12BFI is documented as a similar replacement option. Both parts share the same 256K x 36 organization and 12 ns access time but differ in package configuration. Engineers should verify pinout compatibility and electrical specifications before substituting one for the other in existing designs.