7142LA4J

Overview

The Renesas Electronics Corporation 7142LA4J is a high-speed 2K x 8 dual-port static RAM. It features true dual-ported memory cells allowing simultaneous access to the same location and supports battery backup with 2V data retention. The device operates on a single 5V ±10% TTL-compatible supply, includes an automatic power-down mode controlled by CE for low standby power, and utilizes a 52-pin PLCC package.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations without discrete logic
• Battery backup capability supporting 2V data retention for continuous operation during power loss
• Automatic power-down functionality managed by chip enable signals to minimize standby power consumption

Applications

• High-speed real-time engine systems requiring parallel data processing
• Industrial equipment utilizing asynchronous dual-port communication
• Slave dual-port RAM configurations in multi-bit width systems paired with master devices

Procurement Notes

Verify component authenticity through authorized distributors as this part may be obsolete. Confirm lead-free status and moisture sensitivity level requirements before integration. Ensure compatibility with existing 5V logic levels and check for specific military or industrial temperature grade certifications if required for your application environment.

Selection Notes

Select this component when simultaneous read/write access to shared memory is critical. It serves as a slave device in systems requiring expansion beyond single-port capabilities. Ensure the design accommodates the 52-pin PLCC footprint and provides necessary battery backup circuitry for the 2V retention feature.

Part Context

This component belongs to the 7142 series of dual-port SRAMs, designed to operate alongside 7132 master devices. It eliminates the need for additional discrete logic in 16-bit or wider word width systems, ensuring full-speed error-free operation within its specified electrical parameters.

Replacement Considerations

Consult official datasheets for direct pin-to-pin substitutes within the 7142 family. Verify that any alternative maintains the 2K x 8 organization and 52-pin PLCC package form factor.