COM20020ILJP

Controllers Overview

The COM20020ILJP is a 28-pin PLCC embedded ARCNET controller supporting data rates up to 5 Mbps. It features 2K x 8 on-chip dual-port RAM and implements the deterministic ANSI 878.1 token-passing protocol. The device operates on a single +5V supply with an extended temperature range of -40°C to +85°C. Key specifications include programmable reconfiguration times, command chaining for packet queuing, and software-programmable node IDs. It supports various network topologies including star, tree, and bus configurations.

Controllers Feature Summary

• Implements deterministic token-passing ARCNET protocol for predictable response times in real-time applications
• Integrates 2Kx8 dual-port RAM buffer with command chaining capability for efficient packet queuing
• Features flexible media interface supporting traditional hybrid connections and RS485 differential drivers
• Includes internal clock scaler and multiplier for adjustable network speed control

Controllers Applications

• Industrial automation systems requiring deterministic communication
• Factory and building automation networks
• Transportation control applications
• Embedded automotive environments

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and compliance status. The ILJP designation corresponds to the standard 28-pin PLCC package variant. Ensure compatibility with existing system voltage requirements and thermal management specifications before finalizing procurement orders.

Controllers Selection Notes

Select this component when a dedicated ARCNET controller with integrated memory is required for industrial or embedded applications. Consider the 28-pin PLCC package availability and verify that the microcontroller interface logic matches the target system architecture. Evaluate the need for 5 Mbps data rates and deterministic token-passing capabilities versus alternative networking protocols.

Controllers Part Context

This component belongs to the family of Embedded ARCNET Controllers from Standard Microsystems Corporation (SMSC). It is designed as a general-purpose communications controller for networking microcontrollers and intelligent peripherals. The device optimizes network implementation by integrating protocol engine functions directly onto the chip.

Controllers Replacement Considerations

Official replacement part numbers include COM20020I-DZD for lead-free RoHS compliant 28-pin PLCC packages. Other variants in the series include COM20020I-HD and COM20020I-HT for 48-pin TQFP packages. Verify pinout compatibility and electrical characteristics when substituting.