COM20020I Rev D 5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM Datasheet Product Features New Features for Rev. D Eight, 256 Byte Pages Allow Four Pages TX and RX Plus Scratch-Pad Memory Data Rates up to 5 Mbps Programmable Reconfiguration Times Next ID Readable 28 Pin PLCC and 48 Pin TQFP Packages Internal Clock Scaler and Clock Multiplier for Lead-free RoHS Compliant Packages also Adjusting Network Speed Available o Operating Temperature Range of -40 C to o Ideal for Industrial/Factory/Building +85 C Automation and Transportation Applications Self-Reconfiguration Protocol Deterministic, (ANSI 878.1), Token Passing Supports up to 255 Nodes ARCNET Protocol Supports Various Network Topologies (Star, Minimal Microcontroller and Media Interface Tree, Bus...) Logic Required CMOS, Single +5V Supply Flexible Interface For Use With All Duplicate Node ID Detection Microcontrollers or Microprocessors Powerful Diagnostics Automatically Detects Type of Microcontroller Interface Receive All Packets Mode 2Kx8 On-Chip Dual Port RAM Flexible Media Interface: Command Chaining for Packet Queuing Traditional Hybrid Interface For Long Distances up to Four Miles at 2.5 Mbps Sequential Access to Internal RAM RS485 Differential Driver Interface For Low Software Programmable Node ID Cost, Low Power, High Reliability ORDERING INFORMATION Order Numbers: COM20020ILJP for 28 pin PLCC package COM20020I-DZD for 28 pin PLCC lead-free RoHS compliant package COM20020I-HD for 48 pin TQFP package COM20020I-HT for 48 pin TQFP lead-free RoHS compliant package SMSC COM20020I Rev D Page 1 Revision 12-05-06 DATASHEET 5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM Datasheet 80 Arkay Drive Hauppauge, NY 11788 (631) 435-6000 FAX (631) 273-3123 Copyright 2006 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order (theTerms of Sale Agreemen). The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSCs website at