71321SA20J

Memory IC Overview

The Renesas Electronics Corporation 71321SA20J is a high-speed, asynchronous dual-port static random access memory (SRAM) with an internal interrupt logic for interprocessor communications. It features a storage capacity of 16 kbit organized as 2K x 8 bits. The device supports parallel interface operation with a maximum access time of 20 ns. It operates on a single 5V ±10% power supply, with voltage ranging from 4.5 V to 5.5 V and a maximum power current of 110 mA. The component is housed in a PLCC-52 surface-mount package and functions within an operating temperature range of 0°C to +70°C.

Memory IC Feature Summary

• True dual-ported memory cells allow simultaneous access to the same memory location without conflict.
• Includes two INT flags for direct port-to-port communication and status signaling.
• Features on-chip port arbitration logic and BUSY output flag for seamless data transfer.
• Supports automatic power down mode controlled by chip enable signals for low standby power.

Memory IC Applications

• Interprocessor communication systems requiring fast data exchange
• Stand-alone 8-bit dual-port RAM applications
• Master dual-port RAM configurations in 16-bit or wider word width systems

Memory IC Procurement Notes

Verify component authenticity through authorized distributors or official Renesas channels due to potential counterfeit risks. Confirm RoHS compliance status as indicated in specific datasheets, noting that some variants may not meet current environmental standards. Check for moisture sensitivity level handling requirements during storage and assembly. Ensure compatibility with existing PCB footprints and thermal management solutions before procurement.

Memory IC Selection Notes

Select this component when simultaneous independent access to shared memory is required between two processors. Consider the 20 ns access speed and 16 kbit capacity for moderate performance needs. Evaluate the PLCC-52 package constraints against available board space. Verify that the 0°C to +70°C industrial temperature range meets operational environment requirements.

Memory IC Part Context

This part belongs to the 71321SA series of dual-port SRAMs designed for high-speed data buffering and sharing. It serves as a master device capable of expanding bus widths when paired with slave devices like the 71421. The series emphasizes error-free operation without additional discrete logic, simplifying system design for complex embedded architectures.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not explicitly listed in the provided source material for this specific variant. Consult official Renesas documentation for updated replacement recommendations or equivalent series members such as the 71321LA series if lead-free options are required.