TMC2072-MT

Controllers Overview

The TMC2072-MT is a Peripheral Mode CircLink controller manufactured by Microchip Technology (originally SMSC). It supports network data transfer rates up to 5 Mbps and features an embedded 1K Byte dual-port buffer memory. The device operates on a 3.3 Volt power supply with 5 Volt tolerant I/O and interfaces via an 8-bit or 16-bit data bus compatible with 86xx and 68hxx platforms. It includes a 3-port hub, CMI modem for intelligent error correction, and Network Standard Time synchronization. The component is housed in a 100-pin TQFP lead-free RoHS compliant package and functions within a temperature range of 0 to 70 degrees Celsius.

Controllers Feature Summary

• Supports enhanced token passing protocol with maximum 31 nodes per network and automatic time stamping
• Integrates a 3-port hub and flexible topologies including bus, star, and tree configurations
• Features CMI coded mark inversion with intelligent 1-bit error correction and magnetic saturation prevention
• Provides dual communication modes: Free Format and Remote Buffer

Controllers Applications

• Small control-oriented local area networks requiring deterministic performance
• Industrial automation systems utilizing ARCNET-based protocols
• Networks requiring transformer-coupled media using RS485 differential drivers

Controllers Procurement Notes

Verify the specific ordering suffix MT corresponds to the 100-pin TQFP lead-free RoHS compliant package configuration. Confirm that the manufacturer designation aligns with Microchip Technology's acquisition of SMSC assets. Ensure the revision level matches the required documentation version for design-in compatibility.

Controllers Selection Notes

Select this component when a peripheral mode interface is required for CircLink networks. It is suitable for applications needing 8-bit or 16-bit CPU bus integration with multiplexed or non-multiplexed address/data lines. Consider the integrated 3-port hub for simplified topology implementation without external switching components.

Controllers Part Context

The TMC2072 serves as the flagship product for CircLink technology, designed to replace complex middle-layer protocol stacks. It enables high-reliability real-time networks by implementing modifications to the original ARCNET protocol, such as consecutive node ID assignment to reduce reconfiguration times and token loss.

Controllers Replacement Considerations

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