COM20020I 3.3V
Rev.E
5Mbps ARCNET (ANSI
878.1) Controller with
2K x 8 On-Chip RAM
Datasheet
Product Features
New Features:
- Data Rates up to 5 Mbps
- Programmable Reconfiguration Times
28 Pin PLCC and 48 Pin TQFP packages;
Lead-Free RoHS Compliant packages also
available
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 and Clock Multiplier for
Adjusting Network Speed
o
o
Operating Temperature Range of -40 C to +85 C
3.3V power supply with 5V tolerant I/O
Self-Reconfiguration Protocol
Supports up to 255 Nodes
Supports Various Network Topologies (Star, Tree,
Bus...)
CMOS, Single +3.3V Supply
Duplicate Node ID Detection
Powerful Diagnostics
Receive All Packets Mode
Flexible Media Interface:
-
Traditional Hybrid Interface For Long Distances
at 2.5Mbps
RS485 Differential Driver Interface For Low
Cost, Low Power, High Reliability
ORDERING INFORMATION
Order Number(s):
COM20020I 3VLJP for 28 pin PLCC * package
COM20020I 3V-DZD for 28 pin PLCC * Lead-Free RoHS Compliant package
COM20020I 3V-HD for 48 pin TQFP package
COM20020I 3V-HT for 48 pin TQFP Lead-Free RoHS Compliant package
* TQFP package is recommended for new design
SMSC COM20020I 3.3V Rev.E
1
Revision 09-11-06
DATASHEET
SMSC [ SMSC CORPORATION ]
