Microchip's COM20020I is a member of the family of Embedded ARCNET Controllers from Standard Microsystems Corporation. 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 package, flexible microcontroller and media interfaces, eight-page message support, and extended temperature range of the COM20020I 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 5 Mbps when using the COM20020I.New Features Data Rates up to 5 Mbps Programmable Reconfiguration Times28 Pin PLCC and 48 Pin TQFP RoHS Compliant PackagesIdeal for Industrial/Factory/Building Automation and Transportation ApplicationsDeterministic (ANSI 878.1)Token Passing ARCNET ProtocolMinimal Microcontroller and Media Interface Logic RequiredFlexible Interface for Use with All Microcontrollers or MicroprocessorsAutomatically Detects Type of Microcontroller Interface2K x 8 On-Chip Dual Port RAMCommand Chaining for Packet QueuingSequential Access to Internal RAMSoftware Programmable Node IDEight 256 Byte Pages Allow Four Pages TX and RX Plus Scratch-Pad MemoryNext ID ReadableInternal Clock Scaler and Clock Multiplier for Adjusting Network SpeedOperating Temperature Range of -40°C to +85°CSelf-Reconfiguration ProtocolSupports up to 255 NodesSupports Various Network Topologies (Star, Tree, Bus...)CMOS, Single +3.3V SupplyDuplicate Node ID DetectionPowerful DiagnosticsRecei