71342LA35PF8

Overview

The Renesas Electronics Corporation 71342LA35PF8 is a high-speed 4K x 8 Dual-Port Static RAM featuring fully asynchronous operation from either port. It includes true dual-ported memory cells allowing simultaneous access to the same location and on-chip hardware semaphore logic for port arbitration. The device supports battery backup with 2V data retention, operates on a single 5V TTL-compatible supply (4.5V to 5.5V), and has a 35 ns access time. It is housed in a TQFP-64 surface-mount package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• True dual-ported memory cells enabling simultaneous independent access to shared memory locations by both ports.
• Integrated hardware semaphore logic block providing automatic power-down control and unassigned flags for port arbitration.
• Battery backup capability ensuring data retention at 2V while maintaining standard 5V operation.

Applications

• Systems requiring full-speed error-free operation without external wait states or discrete arbitration logic.
• High-speed data buffering where simultaneous read/write access from two independent processors is necessary.
• Industrial embedded applications operating within the specified wide temperature range.

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm that the specific suffix PF8 corresponds to the required TQFP-64 packaging and industrial temperature grade (-40°C to +85°C). Ensure compatibility with existing 5V logic levels and check for any recent product change notifications regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when hardware-based semaphore arbitration is preferred over software management. It is suitable for designs needing simultaneous access to identical memory addresses without contention handling logic. Verify that the 35 ns access speed meets system timing requirements and that the TQFP-64 package fits the board layout constraints.

Part Context

This device belongs to the 71342 series of dual-port SRAMs, which are designed for applications demanding high-speed parallel data transfer between two masters. Unlike the non-semaphore 7134 series, the 71342 includes dedicated hardware for managing access conflicts, making it ideal for complex multi-processor architectures.

Replacement Considerations

Publicly confirmed substitute part numbers were not identified in the provided documentation. Consult manufacturer resources for potential cross-references or updated series replacements.