70T651S10BCI

Memory IC Overview

The Renesas Electronics Corporation 70T651S10BCI is a high-speed asynchronous dual-port static random-access memory (SRAM) device. It features a storage organization of 256K words by 36 bits, providing a total capacity of 9 Mbit. The component supports a maximum access time of 10 ns and operates on a single 2.5V power supply with a tolerance of ±100mV for the core voltage. It utilizes a parallel interface and is housed in a 208-ball CABGA package measuring 15x15 mm. The device functions within an industrial temperature range from -40°C to +85°C.

Memory IC Feature Summary

• Dual-port architecture enables simultaneous independent access to the same memory location by two separate ports without external arbitration logic.
• Integrated hardware support for semaphore signaling facilitates efficient data synchronization and conflict resolution between the two ports.
• Selectable I/O voltage levels allow compatibility with both 3.3V and 2.5V logic systems while maintaining a single 2.5V core supply.
• Automatic power-down mode reduces standby current consumption when chip selects are deasserted.

Memory IC Applications

• High-performance telecommunications equipment requiring low-latency data buffering
• Network routers and switches utilizing interleaved I/O configurations
• Industrial control systems needing reliable dual-processor data exchange
• Master/slave cascaded memory expansions for wide-data bus architectures

Memory IC Procurement Notes

Verify the specific suffix BCI against official Renesas documentation to confirm package type and temperature grade. Confirm RoHS compliance status as sources indicate non-compliance. Check for end-of-life notifications or product discontinuance notices prior to procurement. Ensure supply chain availability aligns with long-term production requirements given potential obsolescence risks.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data access is required without external bus arbitration. The 36-bit word width suits error-correction code applications. Verify that the 208-pin CABGA footprint fits the target PCB layout. Ensure the design accommodates the LVTTL-compatible I/O levels and the specific 2.5V core power requirement.

Memory IC Part Context

This part belongs to the Renesas 70T651 series of asynchronous dual-port SRAMs. It is designed for standalone operation or cascaded master/slave configurations to expand data bus widths beyond 36 bits. The series emphasizes high-speed performance and integrated port management features for complex system-on-chip environments.

Memory IC Replacement Considerations

The 70T651S12BFI is documented as a similar replacement option, offering identical functionality with a 12 ns access time. Verify pinout and electrical parameter compatibility before substitution.