70T651S12BF

Memory IC Overview

The Renesas Electronics Corporation 70T651S12BF is a high-speed asynchronous dual-port static random-access memory (SRAM) with a storage capacity of 9 Mbit. The device features a memory organization of 256K x 36 bits and supports parallel interface access. It operates within a supply voltage range of 2.4V to 2.6V and provides an access time of 12 ns. The component is housed in a 208-CABGA package measuring 15x15 mm, designed for surface mount installation. It functions reliably across 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 between the two ports.
• On-chip port arbitration logic manages bus conflicts automatically during concurrent read/write operations.
• Selectable I/O power supply allows compatibility with either 3.3V or 2.5V logic levels while maintaining a single core voltage.

Memory IC Applications

• High-speed data buffering in telecommunications equipment requiring low-latency memory access.
• Network switch and router architectures utilizing interleaved I/O configurations for expanded data paths.
• Industrial control systems operating within extended temperature ranges requiring reliable volatile memory storage.
• Master/Slave cascaded configurations expanding system word width beyond standard 36-bit boundaries.

Memory IC Procurement Notes

Verify component authenticity through authorized distributors as this part may be subject to obsolescence notices. Confirm RoHS compliance status prior to integration, as specific variants may not meet current environmental directives. Validate package markings against official datasheets to prevent counterfeit substitution. Check for recent product change notifications regarding labeling or manufacturing site changes before finalizing procurement orders.

Memory IC Selection Notes

Select this component when simultaneous bidirectional memory access is required without external logic overhead. Ensure design accommodates the specific 2.4V to 2.6V core voltage requirement distinct from I/O levels. Verify PCB layout supports the 208-CABGA thermal dissipation characteristics. Consider interrupt flag capabilities for complex handshake protocols between processing units connected to each port.

Memory IC Part Context

This device belongs to the 70T651 series of asynchronous dual-port SRAMs manufactured by Renesas Electronics. The series is engineered for applications demanding high throughput and flexible bus interfacing. It serves as a standalone memory block or expands into larger word-width systems through master/slave cascading. The technology emphasizes rapid write cycles and automatic power-down modes for energy efficiency.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer discontinuance notifications for potential alternative recommendations. Evaluate pin-compatible alternatives only if electrical parameters match exactly. Verify that any replacement maintains the 256K x 36 organization and 12 ns access speed requirements.