7134LA70J8/LT

Overview

The 7134LA70J8/LT is a high-speed 32Kbit (4K x 8) dual-port static RAM manufactured by Renesas Electronics Corporation. It features asynchronous parallel interface with a 70 ns access time and operates on a single 5V power supply within the 4.5V to 5.5V range. The component utilizes true dual-ported memory cells allowing simultaneous independent access from either port without hardware arbitration. It is housed in a 52-pin PLCC surface-mount package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• True dual-ported architecture enabling simultaneous independent access to shared memory locations
• Fully asynchronous operation eliminating wait states for flexible system integration
• Automatic low-power standby mode controlled by chip enable signals
• Battery backup capability supporting 2V data retention

Applications

• Systems requiring contention handling through external arbitration logic
• High-speed data buffering where simultaneous read/write operations are critical
• Industrial control environments necessitating extended temperature stability
• Embedded architectures utilizing standard TTL-compatible 5V logic levels

Procurement Notes

This component is officially classified as obsolete by the manufacturer. Verify current availability status through authorized distributors, noting that lead times may be extended or stock limited. Confirm RoHS compliance requirements against project specifications, as this specific variant may not meet modern environmental standards. Validate pin compatibility and thermal characteristics before finalizing procurement decisions for legacy system maintenance.

Selection Notes

Select this part when designing systems that require independent dual access to shared memory without internal arbitration hardware. Ensure the application environment remains within the specified -40°C to +85°C operational range. Verify that the 52-PLCC package fits the target PCB footprint constraints. Confirm that the 70 ns access speed meets the timing requirements of the connected processors or controllers.

Part Context

The 7134 series represents a family of high-speed CMOS dual-port SRAMs designed for applications demanding concurrent data access. This specific model belongs to the LA sub-series, indicating industrial temperature grading and battery backup support. It serves as a bridge between standard single-port memories and complex FIFO buffers, offering direct port-to-port communication capabilities for efficient data transfer in embedded systems.

Replacement Considerations

Verify functional equivalence with other 7134LA variants such as 7134LA70JI8 or 7134SA70J, ensuring package compatibility and electrical parameter alignment. Cross-reference datasheets to confirm identical pinouts and timing characteristics. Consult manufacturer obsolescence notices for recommended successor components or alternative manufacturers offering comparable dual-port SRAM solutions.