71342LA20PF8

Overview

The Renesas Electronics Corporation 71342LA20PF8 is a high-speed 4K x 8 Dual-Port Static RAM. It features fully asynchronous operation from either port and includes true dual-ported memory cells allowing simultaneous access to the same location. The device incorporates full on-chip hardware support for semaphore signaling between ports, facilitating independent arbitration. It operates on a TTL-compatible single 5V power supply with a range of 4.5V to 5.5V. The component supports battery backup operation with 2V data retention capabilities specific to the LA variant.

Feature Summary

• True dual-ported memory architecture enabling simultaneous independent access to shared memory locations by both ports.
• Integrated on-chip hardware semaphore logic block providing automatic port arbitration and flag control.
• Fully asynchronous interface operation supporting flexible system integration without clock synchronization requirements.
• Automatic power-down feature controlled by chip enable and semaphore signals for low standby power consumption.

Applications

• High-speed data buffering in parallel processing systems requiring concurrent read/write operations.
• Communication equipment utilizing semaphore-based hardware arbitration for multi-port data exchange.
• Industrial control systems needing reliable dual-port memory with asynchronous timing characteristics.

Procurement Notes

Verify the exact suffix configuration against official Renesas documentation, as PF8 may indicate specific packaging or testing variations distinct from PFG8. Confirm moisture sensitivity levels and lead-free status prior to assembly. Ensure compatibility with existing board layouts regarding pin assignments and voltage tolerances. Cross-reference part numbers carefully to avoid confusion with similar density variants within the 71342 family.

Selection Notes

Select this component when simultaneous bidirectional data access is required without external arbitration logic. The integrated semaphore mechanism simplifies design complexity compared to standard dual-port SRAMs lacking hardware support. Verify that the asynchronous nature aligns with system timing constraints. Consider the 5V TTL compatibility for direct interfacing with legacy digital logic families.

Part Context

This device belongs to the 71342 series of dual-port static random-access memories manufactured by Renesas Electronics. The series is designed for applications demanding high-speed, non-destructive read capabilities and independent port operation. The LA suffix typically denotes industrial temperature range availability and specific battery backup retention features compared to other variants in the lineup.

Replacement Considerations

Public confirmed substitute part numbers include IDT71342LA20PFG8. Verify functional equivalence regarding semaphore logic and package dimensions before substitution.