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COM20020I3V-HT

5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM

SMSC -> Microchip 

COM20020I 3.3V Rev.E

5Mbps ARCNET (ANSI

878.1) Controller with

2K x 8 On-Chip RAM

Product Features

ƒ New Features:

- Data Rates up to 5 Mbps

- Programmable Reconfiguration Times

ƒ 28 Pin PLCC and 48 Pin TQFP packages;

Lead-Free RoHS Compliant packages also

available

ƒ Ideal for Industrial/Factory/Building Automation

and Transportation Applications

ƒ Deterministic, (ANSI 878.1), Token Passing

ARCNET Protocol

ƒ Minimal Microcontroller and Media Interface

Logic Required

ƒ Flexible Interface For Use With All

Microcontrollers or Microprocessors

ƒ Automatically Detects Type of Microcontroller

Interface

ƒ 2Kx8 On-Chip Dual Port RAM

ƒ Command Chaining for Packet Queuing

ƒ Sequential Access to Internal RAM

ƒ Software Programmable Node ID

Datasheet

ƒ Eight, 256 Byte Pages Allow Four Pages TX and

RX Plus Scratch-Pad Memory

ƒ Next ID Readable

ƒ Internal Clock Scaler and Clock Multiplier for

Adjusting Network Speed

ƒ Operating Temperature Range of -40oC to +85oC

ƒ 3.3V power supply with 5V tolerant I/O

ƒ Self-Reconfiguration Protocol

ƒ Supports up to 255 Nodes

ƒ Supports Various Network Topologies (Star, Tree,

Bus...)

ƒ CMOS, Single +3.3V Supply

ƒ Duplicate Node ID Detection

ƒ Powerful Diagnostics

ƒ Receive All Packets Mode

ƒ 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

DATASHEET

Revision 09-11-06

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