71421LA20PFG8

Overview

The Renesas Electronics Corporation 71421LA20PFG8 is a high-speed 16Kbit (2K x 8) dual-port static random-access memory (SRAM). It operates asynchronously with a maximum access time of 20 ns. The device supports a single 5V ±10% power supply, functioning within a voltage range of 4.5V to 5.5V. It utilizes a parallel interface and is housed in a 64-pin Thin Quad Flat Package (TQFP) with dimensions of 14x14 mm. The component is designed for surface mount installation and operates within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Features true dual-ported memory cells allowing simultaneous independent access to the same memory location from both ports.
• Includes internal interrupt logic providing two INT flags for direct port-to-port communication without external discrete logic.
• Supports expansion to 16-bit or wider data buses when configured as a slave unit paired with a master dual-port RAM.
• Incorporates on-chip port arbitration logic and a BUSY output flag to manage concurrent access conflicts.

Applications

• Interprocessor communication systems requiring low-latency data exchange between multiple processors.
• High-speed buffer applications in real-time control systems.
• Data storage interfaces in embedded systems utilizing parallel bus architectures.
• Master-slave memory configurations expanding word width beyond 8 bits.

Procurement Notes

Verify component authenticity through authorized distributors due to potential obsolescence status. Confirm package integrity upon receipt, as moisture sensitivity level 3 requires proper handling. Check datasheet revisions for any pinout or electrical parameter updates. Ensure compatibility with existing system voltage levels and timing requirements before integration into final designs.

Selection Notes

Select this component for applications requiring simultaneous read/write access from two independent masters. Consider the 20 ns access speed for high-throughput data buffering needs. Evaluate the 64-TQFP package constraints against available PCB space. Verify that the 0°C to 70°C operating range meets environmental conditions. Assess system complexity reduction benefits from integrated arbitration logic compared to discrete solutions.

Part Context

This part belongs to the 71421LA series of dual-port SRAMs manufactured by Renesas Electronics. It serves as a specialized memory solution for complex embedded architectures. The LA suffix indicates specific electrical characteristics compatible with standard 5V logic families. The PFG8 designation identifies the specific tape-and-reel packaging configuration for automated assembly processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Renesas resources for current equivalent components or legacy cross-reference lists if discontinuation affects production timelines.