COM20019I-DZD-TR

Controllers Overview

The COM20019I-DZD-TR 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 312.5 Kbps with internal clock scaling for lower speeds. The device operates on a single +3.3V supply with 5V tolerant I/O and includes an RS485 differential driver interface. It automatically detects microcontroller bus types (multiplexed or non-multiplexed) and supports up to 255 nodes in various topologies. The component is housed in a 48-pin TQFP package and functions within an operating temperature range of -40°C to +85°C.

Controllers Feature Summary

• Implements deterministic token-passing ARCNET protocol with automatic network reconfiguration capabilities.
• Integrates 2Kx8 dual-port RAM with command chaining for efficient packet queuing and sequential access.
• Features flexible microcontroller interface that automatically adapts to 80xx or 68xx CPU timing modes.
• Includes built-in RS485 differential driver for reliable media connectivity.

Controllers Applications

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

Controllers Procurement Notes

Verify the specific suffix 'DZD-TR' against the manufacturer's official documentation to confirm it denotes the 48-pin TQFP package and tape-and-reel shipping format. Ensure the revision level matches the design requirements, as older revisions may have different errata or pin configurations compared to Rev C.

Controllers Selection Notes

Select this component when a dedicated ARCNET controller with integrated media interface is required. It is suitable for designs needing minimal external logic due to its automatic bus detection and onboard RAM. Consider the 48-pin TQFP form factor for space-constrained PCB layouts requiring surface-mount assembly.

Controllers Part Context

This part belongs to Microchip's family of Embedded ARCNET Controllers. It serves as a general-purpose communications controller designed to connect microcontrollers and intelligent peripherals in industrial environments using the proven ARCNET protocol engine.

Controllers Replacement Considerations

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