COM20020I-HT

Controllers Overview

The COM20020i-HT is an ARCNET controller implementing the ANSI 878.1 token-passing protocol with data rates up to 5 Mbps. It features a 2Kx8 on-chip dual-port RAM buffer and supports flexible microcontroller interfaces, including multiplexed and non-multiplexed buses. The device operates within a temperature range of -40°C to +85°C and utilizes a single +5V supply.

Controllers Feature Summary

• Implements deterministic token-passing ARCNET protocol for real-time applications
• Integrates 2Kx8 dual-port RAM with command chaining for packet queuing
• Supports traditional hybrid interface and RS485 differential driver media options
• Features internal clock scaler and multiplier for adjustable network speeds

Controllers Applications

• Industrial automation networks
• Factory control systems
• Building automation infrastructure
• Transportation control environments

Controllers Procurement Notes

Verify the specific package type required, as the datasheet lists both 28-pin PLCC and 48-pin TQFP options. Confirm that the HT suffix aligns with the specified industrial temperature range and voltage requirements for your design.

Controllers Selection Notes

Select this component when a dedicated ARCNET controller is needed to offload protocol processing from the main CPU. Ensure the host system supports either 80XX or 68XX bus timing modes, as the device automatically detects the interface type upon reset.

Controllers Part Context

This device belongs to Microchip's family of Embedded ARCNET Controllers. It is designed to provide a complete communications node solution when paired with a standard microcontroller, eliminating the need for complex external logic or separate protocol engines.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.