MICROCHIP COM20019IP

The device is a general purpose communications controller for networking microcontrollers and intelligent peripherals in industrial, automotive, and embedded control environments using an ARCNET protocol engine. The small 24 pin package, flexible microcontroller and media interfaces, eight - page message support, and extended temperature range of the COM20019 make it the only true network controller optimized for use in industrial, embedded, and automotive applications. Using an ARCNET protocol engine is the ideal solution for embedded control applications because it provides a deterministic token - passing protocol, a highly reliable and proven networking scheme, and a data rate of up to 312.5 Kbps when using the COM20019. A token - passing protocol provides predictable response times because each network event occurs within a predetermined time interval, based upon the number of nodes on the network. The deterministic nature of ARCNET is essential in real time applications. The integration of the 2Kx8 RAM buffer on - chip, the Command Chaining feature, the maximum data rate, and the internal diagnostics make the COM20019 the highest performance embedded communications device available. With only one COM20019 and one microcontroller, a complete communications node may be implemented.

• Data Rates up to 312.5 Kbps
• Programmable Reconfiguration Times
• 24 Pin DIP, 28 Pin PLCC, 48 Pin TQFP Packages
• Ideal for Industrial/Factory/Building Automation and Transportation Applications
• Deterministic, (ANSI 878.1), Token Passing ARCNET Protocol
• Minimal Microcontroller and Media Interface Logic Required
• Flexible Interface For Use With All Microcontrollers or Microprocessors
• Automatically Detects Type of Microcontroller Interface
• 2Kx8 On - Chip Dual Port RAM
• Command Chaining for Packet Queuing
• Sequential Access to Internal RAM
• Software Programmable Node ID
• Eight, 256 Byte Pages Allow Four Pages TX and RX Plus Scratch - Pad Memory
• Next ID Readable
• Internal Clock Scaler for Adjusting Network Speed
• Operating Temperature Range of -40°C to +85°C
• Self - Reconfiguration Protocol
• Supports up to 255 Nodes
• Supports Various Network Topologies (Star, Tree, Bus...)
• CMOS, Single +5V Supply
• Duplicate Node ID Detection
• Powerful Diagnostics
• Receive All Packets Mode
• Flexible Media Interface: RS485 Differential Driver Interface For Low Cost, Low Power, High Reliability