70121L25JG

Memory IC Overview

The Renesas Electronics Corporation 70121L25JG is a high-speed, asynchronous dual-port static random-access memory (SRAM) device. It features an 18Kb storage capacity organized as 2K x 9 bits. The component utilizes a parallel interface with a maximum access time of 25 ns and operates within a supply voltage range of 4.5V to 5.5V. It is housed in a 52-pin PLCC package with dimensions of 19.13x19.13 mm and supports surface mount installation. The device functions within a commercial temperature range of 0°C to 70°C.

Memory IC Feature Summary

• Dual-port architecture enabling simultaneous independent access from two separate ports without external arbitration logic.
• Master/Slave expandability allowing the 70121 Master chip to pair with the 70125 Slave chip for 18-bit or wider data bus systems.
• On-chip port arbitration logic integrated into the Master port to manage concurrent access conflicts automatically.
• Automatic power-down mode controlled by chip enable signals to minimize standby power consumption.

Memory IC Applications

• High-speed data buffering in communication systems requiring low-latency access.
• Embedded systems utilizing Master/Slave configurations for expanded memory depth.
• Industrial control applications requiring TTL-compatible signal levels and reliable asynchronous operation.

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to obsolete status. Confirm RoHS3 compliance and moisture sensitivity level (MSL 3) requirements for handling. Check for valid replacement part numbers such as IDT70121 variants if original stock is unavailable. Ensure packaging integrity matches standard tube specifications for surface-mount assembly processes.

Memory IC Selection Notes

Select this component when a 2K x 9 organization is required for dual-port memory applications. Consider the 25 ns access speed for systems needing fast asynchronous data retrieval. Evaluate the 52-PLCC package constraints against available PCB real estate. Verify that the 4.5V to 5.5V operating voltage aligns with the system's power supply rails.

Memory IC Part Context

The 70121 series belongs to Renesas' portfolio of high-performance dual-port SRAMs designed for complex embedded environments. This specific model serves as the 'Master' unit in cascaded memory architectures. It complements slave devices to create wider word-length memories without discrete logic overhead. The series emphasizes full-speed error-free operation in demanding industrial and commercial settings.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include IDT70121L25JG. Verify pin compatibility and electrical specifications before substitution. Consult manufacturer PCN documents for any functional changes in updated revisions.