7143SA35G

Overview

The Renesas Electronics Corporation 7143SA35G is a high-speed, asynchronous dual-port static random-access memory (SRAM) IC. It provides a storage capacity of 32K bits, organized as 2K words by 16 bits. The device features a parallel interface with an access time and write cycle time of 35 nanoseconds. It operates on a single 5V power supply within a voltage range of 4.5V to 5.5V. The component is housed in a 68-pin Plastic Leadless Chip Carrier (PLCC) package, measuring 29.46mm by 29.46mm. It supports industrial temperature ranges and includes on-chip port arbitration logic for simultaneous access.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to the same memory location from both ports without conflict.
• Integrated on-chip port arbitration logic that manages bus contention, allowing full-speed operation in master/slave configurations without external discrete logic.
• Asynchronous operation from either port, supporting versatile byte-level write control to easily expand data bus widths to 32 bits or more.

Applications

• High-speed data buffering in telecommunications systems requiring simultaneous read/write operations.
• Master/Slave dual-port RAM configurations in 32-bit or wider memory system applications.
• Industrial control systems requiring reliable asynchronous memory interfaces within specified temperature ranges.

Procurement Notes

Verify component authenticity through authorized distributors due to potential obsolescence status. Confirm RoHS compliance requirements against specific project standards, as historical batches may vary. Ensure packaging integrity upon receipt, as PLCC components are sensitive to mechanical stress during handling and placement. Cross-reference datasheet revisions to confirm pinout and electrical specifications match current design requirements before finalizing procurement orders.

Selection Notes

Select this component when simultaneous bidirectional data transfer is required between two processors or controllers. The integrated arbitration logic simplifies design compared to solutions requiring external control circuits. Verify that the 68-pin PLCC package fits the available PCB footprint and assembly capabilities. Ensure the 35ns speed meets the timing constraints of the target application's clock domains. Consider thermal management requirements if operating at the upper limits of the specified voltage and temperature ranges.

Part Context

The 7143SA series belongs to Renesas' family of high-speed dual-port SRAMs, derived from IDT technology. These devices utilize CMOS processes to offer low power consumption while maintaining fast access times. The 7143 variant specifically targets 2K x 16 density applications. The series is designed to replace older ECL or bipolar memories in high-performance computing and networking equipment, providing a drop-in compatible solution with enhanced functionality.

Replacement Considerations

Publicly confirmed substitute part numbers include 7143LA35G. Verify package compatibility and electrical parameter alignment before substitution. Check for any changes in lead finish or marking codes that may affect assembly processes. Consult official replacement guides for end-of-life notifications.