70121S25JG

Memory IC Overview

The Renesas Electronics Corporation 70121S25JG is a high-speed, asynchronous dual-port static random-access memory (SRAM) device. It features an 18-kilobit storage capacity organized as 2K words by 9 bits. The component operates with a maximum access time of 25 nanoseconds and supports parallel interface communication. It functions within a supply voltage range of 4.5 volts to 5.5 volts and is designed for surface-mount installation in a 52-pin Plastic Leadless Chip Carrier (PLCC) package.

Memory IC Feature Summary

• Dual-port architecture enabling independent simultaneous access from two distinct ports without external arbitration logic.
• Integrated on-chip port arbitration logic allows the master port to manage bus conflicts automatically.
• Supports expansion of data bus width to 18 bits or more when paired with compatible slave devices.
• Includes automatic power-down functionality controlled by chip enable signals to minimize standby power consumption.

Memory IC Applications

• High-speed data buffering in real-time processing systems
• Master-slave memory configurations requiring expanded word widths
• Industrial equipment control systems demanding low-latency data access

Memory IC Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm RoHS3 compliance and moisture sensitivity level requirements during handling. Validate package integrity against shipping damage risks associated with PLCC form factors. Ensure compatibility with existing system voltage levels before integration into final assemblies.

Memory IC Selection Notes

Select this component for applications requiring fully asynchronous dual-port operation with integrated arbitration. Consider the 25 ns access speed for timing-critical interfaces. Evaluate the 52-PLCC package constraints for PCB layout space. Assess the need for battery backup capabilities if data retention below 2V is required for specific operational scenarios.

Memory IC Part Context

This part belongs to the IDT/Renesas 70121/70125 series of dual-port SRAMs. The 70121 serves as the master unit, while the 70125 acts as the slave unit for wider data buses. This family eliminates discrete logic requirements for multi-port memory systems, offering a compact solution for complex embedded memory architectures.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available. The product is listed as discontinued. Designers must evaluate alternative dual-port SRAM families with similar pinouts and electrical characteristics for migration purposes.