70T659S12BCI8

Memory IC Overview

The 70T659S12BCI8 is a dual-port asynchronous static random-access memory (SRAM) manufactured by Renesas Electronics Corporation. It provides a total storage capacity of 4.5 Mbit, organized as 128K words by 36 bits per word. The device features parallel interface access with a maximum access time of 12 ns and a write cycle time of 12 ns. It operates on a single power supply voltage ranging from 2.4 V to 2.6 V. The component is housed in a 256-ball CABGA package measuring 17x17 mm. It supports an industrial operating temperature range from -40°C to +85°C.

Memory IC Feature Summary

• Dual-port architecture enables simultaneous independent access to the same memory location from two separate ports.
• Asynchronous operation allows flexible timing control without requiring a system clock signal for data transfers.
• Integrated busy input mechanism manages port contention to prevent data corruption during simultaneous access attempts.

Memory IC Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in network processing systems
• Data logging applications in industrial automation controllers

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance requirements as the part may not meet current environmental standards. Validate package marking and date codes against official Renesas documentation to ensure traceability. Check for available replacement options if long-term supply stability is required for production.

Memory IC Selection Notes

Select this component when dual-port functionality with 36-bit data width is necessary for high-throughput applications. Ensure the design accommodates the 2.5V core voltage requirement and LVTTL I/O levels. Consider the 256-ball BGA footprint for PCB layout constraints. Verify that the 12 ns access speed meets the system timing requirements for asynchronous interfaces.

Memory IC Part Context

This part belongs to the 70T659 series of dual-port SRAMs designed for high-performance memory applications. It shares architectural similarities with other members of the family but offers specific capacity and pinout configurations. The CABGA package provides thermal efficiency and reliable surface-mount assembly for dense circuit board designs.

Memory IC Replacement Considerations

Official substitutes include 70T659S12BFI and 70T659S12BC8. Verify package compatibility and electrical specifications before substitution. Cross-reference datasheets to confirm pin-to-pin equivalence and functional parity.