7143LA25G

Overview

The Renesas Electronics Corporation 7143LA25G is a high-speed, 32-kilobit (2K x 16) dual-port static random-access memory. It operates on a single 5V power supply with a voltage range of 4.5V to 5.5V and features a maximum access time of 25 nanoseconds. The device utilizes a parallel interface for asynchronous operation from either port. It is housed in a 68-pin PLCC package and supports battery backup operations with data retention down to 2V. The component includes on-chip arbitration logic and TTL-compatible inputs.

Feature Summary

• True dual-ported memory cells allow 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.
• Supports versatile write control for separate upper and lower bytes, enabling easy expansion of data bus width to 32 bits or more.

Applications

• High-speed real-time processing systems requiring concurrent data access
• Master/Slave dual-port RAM architectures for error-free full-speed operation
• Battery-backed volatile memory applications requiring 2V data retention

Procurement Notes

Verify current availability status as this component may be subject to discontinuation or limited stock. Confirm RoHS compliance requirements against specific project standards, as older variants may not meet current environmental directives. Ensure the 68-pin PLCC package footprint matches the target PCB design constraints before finalizing procurement orders.

Selection Notes

Select this model when simultaneous read/write access to shared memory is required without external arbitration hardware. The 25ns speed class suits moderate-to-high frequency digital signal processing tasks. Verify that the 0°C to +70°C commercial temperature range meets the operational environment specifications. Consider the 68-pin PLCC package if through-hole or standard surface-mount assembly methods are preferred over smaller form factors.

Part Context

The 7143 series represents a family of high-performance dual-port SRAMs designed by IDT and now manufactured by Renesas. These devices utilize a proprietary Master/Slave approach to facilitate wide-bus memory systems. The 7143LA variant specifically denotes the commercial temperature grade and plastic leaded chip carrier packaging, distinguishing it from industrial or military grade equivalents within the same functional architecture.

FAQ

How does the 7143LA25G handle simultaneous access requests from both ports?

The device incorporates on-chip port arbitration logic that automatically resolves conflicts, allowing true dual-port operation without requiring additional external control circuitry.

What is the minimum voltage for data retention during battery backup?

The component supports battery backup operation with data retention capabilities down to 2V, ensuring data integrity during main power loss.