COM90C26LJP

Controllers Overview

The SMSC COM90C26LJP is a dedicated ARCNET local area network controller and transceiver designed for interconnecting processors with intelligent peripherals. It integrates the MAC layer logic and physical layer interface into a single CMOS component, supporting standard ARCNET protocols. The device features an on-chip RAM buffer to facilitate data handling and includes an AT-compatible interface for straightforward integration with host microprocessors. It operates as a special-purpose communications adapter, enabling reliable network communication in embedded systems without requiring external protocol controllers.

Controllers Feature Summary

• Integrated ARCNET controller and transceiver functionality
• On-chip RAM for data buffering and management
• AT-compatible interface for processor connectivity
• Supports standard ARCNET local area network protocols

Controllers Applications

• Interfacing processors with intelligent peripherals in industrial networks
• Embedded system local area network nodes
• Automated control system communication modules

Controllers Procurement Notes

Verify the specific suffix LJP indicates the package type and temperature grade against the official datasheet. Confirm availability status as legacy components may have limited production runs. Ensure compatibility with existing system voltage levels and clock requirements before procurement.

Controllers Selection Notes

Select this component when a complete ARCNET solution is required without external PHY or MAC chips. Compare pinout compatibility with alternative versions like COM90C66 if additional memory is needed. Verify that the AT interface matches the host processor's bus architecture.

Controllers Part Context

This part belongs to the COM90 series of ARCNET controllers from SMSC (now Microchip Technology). These devices were widely used in the 1990s and early 2000s for building robust, deterministic local area networks in industrial and commercial applications. The COM90C26 variant specifically offers integrated transceiver capabilities.

Controllers Replacement Considerations

Check for direct pin-to-pin replacements within the COM90 family, such as the COM90C66, which includes additional on-chip RAM. Verify if newer ARCNET controllers from Microchip or other vendors maintain backward compatibility with existing software drivers and hardware layouts.