COM20020i Rev. D 5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-chip RAM Eight, 256 Byte Pages Allow Four Pages TX and Highlights RX Plus Scratch-Pad Memory Data Rates up to 5 Mbps Next ID Readable Programmable Reconfiguration Times Internal Clock Scaler and Clock Multiplier for 28-Pin PLCC and 48-Pin TQFP RoHS Compliant Adjusting Network Speed packages o o Operating Temperature Range of -40 C to +85 C Ideal for Industrial/Factory/Building Automation Self-Reconfiguration Protocol and Transportation Applications Supports up to 255 Nodes Deterministic, (ANSI 878.1), Token Passing ARC- Supports Various Network Topologies (Star, Tree, NET Protocol Bus...) Minimal Microcontroller and Media Interface Logic CMOS, Single +5V Supply Required Duplicate Node ID Detection Flexible Interface For Use With All Microcontrol- Powerful Diagnostics lers or Microprocessors Receive All Packets Mode Automatically Detects Type of Microcontroller Interface Flexible Media Interface: 2Kx8 On-chip Dual Port RAM - Traditional Hybrid Interface For Long Dis- tances up to Four Miles at 2.5 Mbps Command Chaining for Packet Queuing - RS485 Differential Driver Interface For Low Sequential Access to Internal RAM Cost, Low Power, High Reliability Software Programmable Node ID 2001-2020 Microchip Technology Inc. DS00002704C-page 1COM20020i Rev. D TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and enhanced as new volumes and updates are introduced. If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via E-mail at docerrors microchip.com. We welcome your feedback. Most Current Data Sheet To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at: