70121S45JG8

Memory IC Overview

The Renesas Electronics Corporation 70121S45JG8 is a high-speed, fully asynchronous dual-port static random-access memory (SRAM) device. It features an 18Kb storage capacity organized as 2K words by 9 bits. The component supports independent access from two ports with on-chip arbitration logic for master-slave configurations. It operates within a 4.5V to 5.5V supply voltage range and offers a maximum access time of 45ns. The device is housed in a 52-pin PLCC surface-mount package.

Memory IC Feature Summary

• Dual-port architecture enabling simultaneous independent access from two distinct interfaces
• On-chip port arbitration logic facilitating seamless expansion to wider data bus widths
• Automatic power-down mode controlled by chip enable signals for low standby power consumption

Memory IC Applications

• High-speed data buffering in industrial control systems
• Real-time signal processing applications requiring concurrent read/write operations
• Embedded systems utilizing master-slave memory expansion topologies

Memory IC Procurement Notes

Verify the exact suffix designation against official manufacturer documentation, as variations such as JG versus JG8 may indicate specific packaging or environmental compliance differences. Confirm current availability status, as this component family has been subject to discontinuation notices. Ensure compatibility with existing board layouts regarding the 52-PLCC footprint and electrical specifications before finalizing procurement decisions.

Memory IC Selection Notes

Select this component when designing systems requiring true dual-port memory without external arbitration logic. It is suitable for applications needing expanded word widths through cascading master and slave units. Verify that the 45ns access speed meets system timing requirements and that the 52-PLCC package aligns with thermal and spatial constraints.

Memory IC Part Context

This part belongs to the IDT 70121 series of dual-port SRAMs, originally developed by Integrated Device Technology and now managed by Renesas Electronics. The series is designed for high-performance embedded applications where concurrent data access is critical. The 70121 variant specifically serves as a master unit capable of expanding to 18-bit or wider word lengths when paired with compatible slave devices.

Memory IC Replacement Considerations

Consult official Renesas replacement guides for direct equivalents. Cross-reference pinouts and electrical characteristics carefully if considering alternative manufacturers.