70T651S12BCI8

Memory IC Overview

The 70T651S12BCI8 is a 9-Mbit asynchronous dual-port static random-access memory (SRAM) manufactured by Renesas Electronics Corporation. It features a memory organization of 256K words by 36 bits, providing high-speed data access with a maximum access time of 12 nanoseconds. The device operates on a single 2.5V core power supply and supports selectable 3.3V or 2.5V I/O levels. It is housed in a 256-ball CABGA package measuring 17x17 mm and is rated for industrial temperatures ranging from -40°C to +85°C.

Memory IC Feature Summary

• Supports simultaneous independent access to the same memory location from both ports without external arbitration logic.
• Includes RapidWrite mode to simplify high-speed consecutive write cycles.
• Features full on-chip hardware support for semaphore signaling between ports.
• Provides automatic low standby power mode controlled by chip enable inputs.

Memory IC Applications

• Stand-alone dual-port RAM systems
• Master/Slave configurations for expanding data bus width to 72 bits or more
• Systems requiring concurrent read/write operations without discrete logic

Memory IC Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm package marking and date codes against official Renesas documentation. Check for moisture sensitivity level compliance prior to soldering. Ensure voltage levels match system requirements for both core and I/O supplies.

Memory IC Selection Notes

Select this component when simultaneous bidirectional data transfer is required without external control logic. Suitable for applications needing expanded word widths via cascading. Verify thermal management capabilities for the CABGA package within the specified industrial temperature range.

Memory IC Part Context

This part belongs to the 70T651 series of high-speed asynchronous dual-port SRAMs. It shares architectural similarities with other members like the 70T653M but differs in density and specific pinout configurations. The series is designed for robust parallel interface communication in embedded systems.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available as the product is discontinued. Evaluate equivalent asynchronous dual-port SRAMs with matching 256K x 36 organization and 12ns access time.