Product Features
New Features:
− Data Rates up to 312.5 Kbps
− Programmable Reconfiguration Times
28 Pin PLCC and 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
COM20019I
Low Cost ARCNET
(ANSI 878.1)
Controller with 2K x 8
On-Board RAM
Datasheet
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 -40oC to +85oC
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
ORDERING INFORMATION
Order Number(s):
COM20019I-LJP for 28 pin PLCC Package
COM20019I-HD for 48 pin TQFP Package
SMSC COM20019I
Page 1
DATASHEET
Rev. 04-15-05