70T651S15BC8

Memory IC Overview

The Renesas 70T651S15BC8 is a high-speed asynchronous dual-port static random-access memory (SRAM) with a storage capacity of 9 Mbit, organized as 256K x 36. It operates on a single 2.5V power supply for the core and supports selectable 3.3V or 2.5V I/O levels. The device features a 15 ns access time and utilizes a 256-ball CABGA package. Designed for parallel interface applications, it includes advanced features such as RapidWrite mode, port arbitration logic, semaphore signaling, and JTAG functionality to facilitate complex system integration.

Memory IC Feature Summary

• Dual-port architecture enabling simultaneous independent access from two separate ports without external arbitration logic.
• Master/Slave cascading capability allows data bus width expansion to 72 bits or more while maintaining full-speed operation.
• Integrated hardware support for semaphore signaling and port arbitration simplifies multi-processor communication protocols.
• RapidWrite mode optimizes consecutive write cycles to enhance throughput in high-speed data acquisition scenarios.

Memory IC Applications

• High-performance networking equipment requiring low-latency packet buffering
• Telecommunications systems utilizing interleaved I/O architectures
• Industrial control systems needing reliable dual-processor data exchange

Memory IC Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance requirements as original specifications may differ from current manufacturing standards. Validate package integrity upon receipt, as moisture sensitivity level 3 requires strict handling protocols. Ensure design-in compatibility with existing voltage domains before finalizing procurement plans.

Memory IC Selection Notes

Select this component when dual-port independence and wide data bus expansion are critical. The 256K x 36 organization suits applications requiring large word lengths without external logic. Consider the 15 ns speed grade for moderate-to-high frequency interfaces. Evaluate thermal performance within the commercial temperature range if operating conditions exceed standard limits.

Memory IC Part Context

Part of the 70T651 family of asynchronous dual-port SRAMs. Shares architectural similarities with variants like 70T651S10BFGI8 but differs in access speed and packaging. Designed for standalone use or cascaded configurations in master/slave modes. Represents a legacy solution for high-reliability memory applications in established industrial and telecom designs.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in verified documentation. Designers should consult official discontinuation notices for recommended migration paths or equivalent series members with compatible pinouts and electrical characteristics.