7143LA90GB

Overview

The Renesas 7143LA90GB is a high-speed, 32Kb (2K x 16) dual-port static random-access memory (SRAM). It features asynchronous parallel operation with independent read/write ports. The device operates on a single 5V power supply within the 4.5V to 5.5V range. It utilizes true dual-ported memory cells allowing simultaneous access to the same location. The component is housed in a 68-pin PLCC package and supports battery backup for data retention.

Feature Summary

• True dual-ported architecture enabling simultaneous independent access from two ports
• On-chip port arbitration logic with BUSY input for master/slave configurations
• TTL-compatible single 5V power supply operation
• Separate write control for upper and lower bytes of each port

Applications

• High-speed data buffering in communication systems
• Cache memory applications in embedded processors
• Industrial control system data storage
• Test and measurement equipment memory modules

Procurement Notes

Verify the specific suffix GB against official Renesas documentation to confirm package type and compliance status. Check current lifecycle status as older SRAM models may be discontinued or subject to last-time-buy notices. Ensure compatibility with existing PCB footprints for the 68-LCC(J-Lead) configuration before procurement.

Selection Notes

Select this component when simultaneous independent access to shared memory locations is required without external arbitration logic. The 2K x 16 organization suits applications needing moderate density with high throughput. Verify that the 68-pin PLCC package fits the assembly constraints and that the 5V TTL interface matches the system voltage levels.

Part Context

The 7143 series represents a family of high-speed dual-port SRAMs originally developed by IDT and later acquired by Renesas. These devices are designed for complex digital signal processing and real-time control applications where low latency and concurrent port access are critical. The LA variant typically denotes specific speed grades and packaging options within the broader 7143 product line.

Replacement Considerations

Cross-reference with other 7143LA variants such as 7143LA20JG8 or 7143LA35J8 for different access times. Verify pinout compatibility with original designs. Consider newer Renesas dual-port SRAM families if the 7143 series is no longer in active production.