70121L55JG8

Memory IC Overview

The 70121L55JG8 is a dual-port asynchronous SRAM manufactured by Renesas Electronics Corporation. It features a storage capacity of 18Kb organized as 2K x 9 bits. The device operates with a parallel interface and has an access time of 55 ns. It supports a supply voltage range of 4.5V to 5.5V and functions within a temperature range of 0°C to 70°C. The component is housed in a 52-pin PLCC package.

Memory IC Feature Summary

• Dual-port architecture enabling independent simultaneous access from two ports
• Asynchronous operation without requiring external clock signals
• On-chip port arbitration logic for master/slave expansion configurations

Memory IC Applications

• High-speed data buffering in industrial equipment
• Real-time control systems requiring low latency memory access
• Embedded applications utilizing 18-bit or wider data bus architectures

Memory IC Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS3 compliance and moisture sensitivity level (MSL 3) requirements for surface mount assembly processes. Review product change notices for any labeling or packaging updates prior to procurement.

Memory IC Selection Notes

Select this component for designs requiring independent dual-port memory access with TTL-compatible 5V signaling. Ensure the system accommodates the 52-pin PLCC footprint and operates within the specified commercial temperature range. Consider pin compatibility if replacing legacy IDT variants.

Memory IC Part Context

This part belongs to the 70121 series of high-speed dual-port static RAMs. It is designed to function as a standalone 9-bit memory or as a master unit expanding width when paired with slave devices like the 70125. The series supports battery backup operations for data retention.

Memory IC Replacement Considerations

The 70121L25JG8 is a documented alternative offering faster 25 ns access times within the same package and electrical specifications.