70T659S15BC

Memory IC Overview

The 70T659S15BC 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. The device operates with a maximum access time of 15 ns and requires a supply voltage range of 2.4 V to 2.6 V. It is housed in a 256-lead CABGA package measuring 17x17 mm. The component supports parallel interface communication and functions within an operating temperature range of 0°C to 70°C.

Memory IC Feature Summary

• Dual-port architecture enabling simultaneous independent access to shared memory locations from two separate ports.
• Asynchronous operation allowing flexible timing control without reliance on a global clock signal for data transfers.
• Integrated hardware support for semaphore signaling to manage port contention and coordinate access between processors.

Memory IC Applications

• High-speed data buffering in telecommunications equipment
• Cache memory implementation in embedded processing systems
• Data logging applications requiring rapid write cycles

Memory IC Procurement Notes

Verify the current lifecycle status before procurement, as this specific part number may be discontinued or subject to production changes. Confirm that the required 2.4V to 2.6V power supply aligns with your system design. Ensure compatibility with the 256-CABGA surface-mount package footprint during PCB layout. Check for RoHS compliance requirements, as older variants may not meet current environmental standards.

Memory IC Selection Notes

Select this component when a system requires high-bandwidth, low-latency data sharing between two independent controllers. The 36-bit word width suits applications needing wide data paths without external multiplexing. Consider the 15 ns access speed against system timing constraints. Evaluate the thermal performance within the commercial temperature range if operating conditions exceed standard ambient limits.

Memory IC Part Context

This device belongs to the 70T659 series of dual-port SRAMs, designed for high-performance memory applications. It shares architectural similarities with other members like the 70T659S12BC but differs in access speed specifications. The series utilizes LVTTL-compatible I/O levels, facilitating integration with various logic families while maintaining high-speed data integrity across the parallel bus interface.

Memory IC Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative devices such as the 70T659S12BC only if electrical parameters and pin configurations match exactly.