COM20020I3V-HT

Controllers Overview

The COM20020I3V-HT is a standalone ARCNET controller implementing the ANSI 878.1 protocol with data rates up to 5 Mbps. It features a 2K x 8 on-chip dual-port RAM buffer and supports flexible microcontroller interfaces, including multiplexed and non-multiplexed modes for 80xx and 68xx architectures. The device operates on a single +3.3V supply with 5V tolerant I/O and includes an internal clock scaler/multiplier for network speed adjustment. It provides deterministic token-passing communication suitable for industrial automation and transportation applications.

Controllers Feature Summary

• Implements deterministic token-passing ARCNET protocol (ANSI 878.1) with automatic network reconfiguration capabilities
• Integrates 2K x 8 dual-port RAM with command chaining for efficient packet queuing and sequential access
• Supports flexible media interfaces including traditional hybrid dipulse signaling and RS-485 differential drivers
• Features programmable node ID assignment, duplicate detection, and comprehensive internal diagnostics

Controllers Applications

• Industrial factory automation systems requiring deterministic real-time communication
• Building automation networks utilizing ARCNET topology
• Transportation control systems needing reliable embedded networking
• Embedded intelligent peripherals connected via microcontroller interfaces

Controllers Procurement Notes

Verify that the specific suffix HT corresponds to the 48-pin TQFP lead-free RoHS compliant package as documented in the ordering information. Confirm the revision level matches Rev.E specifications for timing and electrical characteristics. Ensure the procurement source provides the official datasheet to validate pin configurations and interface requirements before integration.

Controllers Selection Notes

Select this component when a standalone ARCNET controller with integrated memory is required to minimize external logic. It is suitable for designs needing support for both 80xx and 68xx bus interfaces without additional glue logic. Consider the 48-pin TQFP package for new designs as recommended by the manufacturer. Verify that the application environment falls within the -40°C to +85°C operating temperature range.

Controllers Part Context

This part belongs to the SMSC COM20020I family of embedded ARCNET controllers. It is designed to replace discrete logic solutions by integrating the protocol engine, RAM, and media interface into a single chip. The device simplifies the implementation of ARCNET nodes in microcontroller-based systems, offering a cost-effective alternative to complex processor-based networking stacks.

Controllers Replacement Considerations

Public confirmed substitute part numbers: COM20020I3VLJP, COM20020I3V-DZD, COM20020I3V-HD.