COM20020I-DZD

Controllers Overview

The COM20020I-DZD is an embedded ARCNET controller implementing the ANSI 878.1 token-passing protocol. It features a 2Kx8 on-chip dual-port RAM buffer and supports data rates up to 5 Mbps using an internal clock multiplier. The device operates on a single +5V supply with an extended temperature range of -40°C to +85°C. It provides flexible microcontroller interfaces that automatically detect 80XX or 68XX bus protocols, along with traditional hybrid and RS-485 media interfaces for industrial applications.

Controllers Feature Summary

• Implements deterministic token-passing ARCNET protocol with automatic network reconfiguration capabilities.
• Features integrated 2Kx8 dual-port RAM with command chaining for efficient packet queuing.
• Supports flexible microcontroller interfaces via automatic detection of 80XX or 68XX bus signaling.
• Includes internal clock scaling and multiplication to support data rates from 156.25 Kbps to 5 Mbps.

Controllers Applications

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

Controllers Procurement Notes

Verify the specific package configuration against the datasheet, as the COM20020i family includes both 28-pin PLCC and 48-pin TQFP options. Confirm that the ordering suffix corresponds to the required physical footprint and pinout for your design. Ensure compatibility with the target microcontroller's bus timing requirements before finalizing procurement.

Controllers Selection Notes

Select this component when a dedicated hardware solution for ARCNET networking is required to offload processing from the main CPU. It is suitable for designs needing robust token-passing reliability and extended temperature operation. Consider the available interface modes and memory depth when evaluating system integration complexity.

Controllers Part Context

This device belongs to Microchip's Embedded ARCNET Controller family, designed specifically for industrial and embedded control environments. It serves as a specialized communications controller that integrates the ARCNET protocol engine directly into the silicon, reducing the need for external logic components in network node implementations.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify mechanical and electrical compatibility if considering alternative ARCNET controllers from other manufacturers.