71342SA70JI8

Overview

The Renesas Electronics Corporation 71342SA70JI8 is a 32Kb (4K x 8) dual-port static random-access memory IC. It features asynchronous parallel interface operation with a 70 ns access time and write cycle time. The device operates on a single 5V power supply ranging from 4.5V to 5.5V. It is housed in a 52-pin PLCC package measuring 19.13x19.13 mm, designed for surface mount installation. The component supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to the same memory location from either port.
• Fully asynchronous operation allowing flexible timing control without external clock synchronization requirements.
• Automatic power down feature controlled by chip enable signals to achieve very low standby power consumption.

Applications

• Systems requiring hardware semaphore signaling for port arbitration
• Real-time data buffering between independent processors
• Industrial equipment with strict temperature tolerance requirements

Procurement Notes

This component is officially discontinued by the manufacturer. Verify availability through authorized distributors only, as stock may be limited or obsolete. Confirm RoHS compliance status, which is listed as non-compliant for this specific part number. Ensure replacement strategies account for the end-of-life status before finalizing design implementations.

Selection Notes

Select this part when true dual-port functionality with hardware semaphore support is required for asynchronous systems. The 70 ns speed suits moderate-speed applications where simultaneous read/write access is critical. Consider the 52-PLCC package constraints and industrial temperature range suitability for your specific environmental conditions.

Part Context

The 71342SA70JI8 belongs to the 71342 series of high-speed dual-port SRAMs. This series distinguishes itself by including on-chip hardware semaphore logic for automatic port arbitration, unlike the simpler 7134 series which lacks this feature. It represents a specialized memory solution for complex multi-processor architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation due to the product's discontinuation status. Evaluate alternative dual-port SRAM families with similar semaphore capabilities if direct pin-to-pin replacements are required for ongoing production needs.