70121S45JG

Memory IC Overview

The 70121S45JG is a dual-port static random-access memory (SRAM) integrated circuit manufactured by Renesas Electronics Corporation. It provides an 18Kbit storage capacity organized as 2K words by 9 bits. The device features asynchronous parallel interface operation with a maximum access time of 45 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package measuring 19.13mm x 19.13mm. The component supports surface-mount installation and functions reliably across a commercial temperature range of 0°C to 70°C.

Memory IC Feature Summary

• Dual-port architecture enabling independent simultaneous access from two separate masters
• Asynchronous parallel interface for straightforward integration into existing bus systems
• Compact 52-pin PLCC surface-mount packaging suitable for space-constrained designs

Memory IC Applications

• Data buffering in high-speed digital signal processing systems
• Cache memory implementation in embedded microcontroller architectures
• FIFO buffer applications in telecommunications equipment

Memory IC Procurement Notes

Verify the exact suffix JG confirms the 52-PLCC package and 45ns speed grade, as variations exist within the 70121 family. Confirm RoHS compliance status and moisture sensitivity level requirements against your manufacturing process specifications. Check for obsolescence notices or last-time buy notifications directly from Renesas, as this component may have reached end-of-life status. Ensure lead times align with production schedules given potential availability constraints for legacy memory parts.

Memory IC Selection Notes

Select this component when dual-port functionality is required for concurrent data handling without external arbitration logic. The 45ns access time suits moderate-speed asynchronous applications rather than high-frequency synchronous buses. Consider the 52-PLCC footprint compatibility with existing PCB layouts. Evaluate power consumption characteristics against system thermal limits, noting the specific operating voltage range constraints for reliable noise immunity.

Memory IC Part Context

This part belongs to the IDT/Renesas 70121 series of dual-port SRAMs, designed for applications requiring independent port access. The series offers various speed grades and package options to accommodate different performance and form-factor requirements. These devices are commonly utilized in industrial control, networking, and automotive subsystems where data integrity and concurrent access are critical operational parameters.

Memory IC Replacement Considerations

Direct substitutes include other 70121 series variants with compatible pinouts and electrical characteristics. Verify that any replacement maintains the 52-PLCC package dimensions and 4.5V-5.5V supply requirements. Cross-reference functional equivalents from other manufacturers ensuring identical dual-port asynchronous behavior and timing specifications.