71321LA25JI

Memory IC Overview

The Renesas Electronics Corporation 71321LA25JI is a high-speed, asynchronous dual-port static random-access memory (SRAM) device. It features a storage capacity of 16 kilobits organized as 2K words by 8 bits. The component supports parallel interface operations with a maximum access time of 25 nanoseconds. It operates within a supply voltage range of 4.5 volts to 5.5 volts and is housed in a 52-pin Plastic Leadless Chip Carrier (PLCC) package. The device is designed for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location by two processors without conflict.
• Integrated internal interrupt logic providing two dedicated flags for efficient port-to-port communication and synchronization.
• On-chip arbitration logic manages bus conflicts automatically, allowing expansion to wider data buses when paired with compatible slave devices.

Memory IC Applications

• Interprocessor communication buffers in multiprocessor systems
• High-speed data buffering between asynchronous system components
• Master dual-port RAM configuration in expanded 16-bit or wider data bus architectures

Memory IC Procurement Notes

Verify current availability status as this component may be subject to end-of-life restrictions. Confirm RoHS compliance requirements against specific project standards, as older variants may not meet current environmental directives. Ensure the 52-PLCC footprint matches the target PCB design. Validate that the 4.5V to 5.5V operating voltage aligns with the system power supply rails before finalizing procurement.

Memory IC Selection Notes

Select this component when true simultaneous dual-port access is required for complex data sharing between processors. The integrated interrupt logic simplifies system design by reducing the need for external control circuitry. Consider the 25ns access speed for applications requiring fast data throughput. Ensure the system can accommodate the 52-pin PLCC package size and that the operating temperature range meets environmental constraints.

Memory IC Part Context

This part belongs to the 71321 series of dual-port SRAMs manufactured by Renesas Electronics. It is functionally related to other members of the 71321 family, such as the 71321SA25J, which shares similar electrical characteristics but may differ in packaging or commercial temperature ratings. The LA suffix typically denotes industrial temperature range capability.

Memory IC Replacement Considerations

IDT71321LA25JI is listed as an alias for this component. Verify pinout compatibility and electrical specifications before substituting with any alternative dual-port SRAM devices.