7143SA55G

Overview

The Renesas Electronics Corporation 7143SA55G 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 and write cycle time of 55 ns. It operates on a single 5V power supply within the voltage range of 4.5V to 5.5V. The component is housed in a 68-pin ceramic pin grid array (PGA) package measuring 29.46x29.46 mm. Designed for industrial applications, it functions reliably within a temperature range of 0°C to 70°C.

Feature Summary

• True dual-ported memory cells enable simultaneous independent access to the same memory location from both ports 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 allow flexible data bus expansion to 32 bits or wider.
• Supports battery backup operation with data retention down to 2V, ensuring data integrity during main power loss.

Applications

• High-performance real-time engine systems requiring concurrent data processing
• Industrial equipment controllers needing reliable non-volatile-like data handling via battery backup
• Communication systems utilizing master/slave dual-port RAM architectures for error-free full-speed operation

Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm package integrity for the 68-PGA ceramic housing. Check RoHS compliance requirements as the part may not meet current environmental standards. Validate electrical specifications against system requirements before integration. Review official product change notices for any labeling or manufacturing updates.

Selection Notes

Select this component when simultaneous bidirectional memory access is required without external arbitration logic. Ensure the design accommodates the 68-pin PGA footprint and through-hole mounting constraints. Verify that the 55 ns speed meets the system timing requirements. Consider the industrial temperature range suitability for the operating environment. Evaluate battery backup circuitry needs for data retention below 4.5V.

Part Context

The 7143SA55G belongs to the Renesas 7143SA series of high-speed dual-port SRAMs. This family utilizes CMOS technology to provide fast, asynchronous operation. The series includes variants with different access times and packages, such as the 7143SA25G and 7143SA55J. These devices are designed for applications demanding high throughput and complex memory management without external logic overhead.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The 7143SA55G is listed as discontinued. Engineers should consult official Renesas resources for potential obsolescence management strategies or equivalent legacy parts.