7143LA90J

Overview

The Renesas Electronics Corporation 7143LA90J is a high-speed, asynchronous dual-port static random-access memory (SRAM) IC. It features a storage capacity of 32Kb organized as 2K words by 16 bits. The device supports parallel interface operation with an access time of 90 ns. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V and functions at temperatures between 0°C and 70°C. The component is housed in a 68-pin Plastic Leadless Chip Carrier (PLCC) package.

Feature Summary

• True dual-ported memory cells allow simultaneous independent access to the same memory location from either port without conflict.
• On-chip port arbitration logic manages bus contention automatically, eliminating the need for external discrete logic in master/slave configurations.
• Separate write control signals for the upper and lower bytes of each port enable flexible data bus expansion capabilities.

Applications

• High-performance real-time engine systems requiring concurrent data processing
• Industrial equipment utilizing 32-bit microcontroller architectures
• Master/Slave dual-port RAM configurations for error-free full-speed operation

Procurement Notes

Verify the specific suffix 'J' against official Renesas documentation to confirm the exact package variant and temperature grade. Confirm RoHS compliance status as older variants may not meet current environmental standards. Check for active production status or Last Time Buy notifications directly with the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when simultaneous read/write access to shared memory is required without external arbitration hardware. Ensure the system design accommodates the 68-pin PLCC footprint and 5V logic levels. Verify that the 90 ns access speed meets the timing requirements of the target application's processor interface.

Part Context

The 7143 series represents a family of high-speed dual-port SRAMs originally developed by Integrated Device Technology (IDT) and later acquired by Renesas Electronics. These devices utilize a Master/Slave approach to facilitate wide-memory system applications. The LA suffix typically denotes the commercial temperature range and plastic packaging option within this product line.

Replacement Considerations

Cross-reference with IDT7143SA90J or IDT7143LA90J for pin-compatible alternatives. Verify functional equivalence regarding port arbitration logic and byte-wide write controls before substitution.