71421SA5J8

Overview

The Renesas Electronics Corporation 71421SA5J8 is a dual-port static random-access memory (SRAM) integrated circuit. It provides a storage capacity of 16 kilobits, organized as 2K words by 8 bits. The device utilizes an asynchronous parallel interface with a maximum access time of 55 nanoseconds. It operates within a supply voltage range of 4.5V to 5.5V and supports surface-mount installation in a 52-pin Plastic Leadless Chip Carrier (PLCC) package. The component is designed for commercial temperature operation ranging from 0°C to 70°C.

Feature Summary

• Supports simultaneous independent read/write operations at two distinct ports.

Applications

• High-speed data buffering in communication systems
• Cache memory implementation in embedded processors
• Data logging in industrial control units

Procurement Notes

Verify the specific suffix J8 against official datasheets to confirm package dimensions and lead finish specifications. Confirm RoHS compliance status as historical records indicate non-compliance for this series. Validate that the supplier provides genuine Renesas products due to the component's discontinued status and potential availability through third-party channels.

Selection Notes

Select this component when dual-port functionality is required for concurrent master-slave or peer-to-peer data exchange. Ensure the system design accommodates the 52-PLCC footprint and 5V logic levels. Consider the 55ns access speed relative to processor clock cycles. Verify thermal management requirements for the commercial temperature grade environment.

Part Context

This part belongs to the IDT71421SA family of dual-port SRAMs manufactured by Renesas Electronics. These devices are engineered for applications requiring high-bandwidth memory sharing between multiple controllers without bus contention. The 71421SA variant specifically offers 16Kb density in a compact PLCC form factor suitable for space-constrained electronic assemblies.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, verify pin compatibility and electrical characteristics with alternative dual-port SRAMs from other manufacturers before integration.