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Datasheet Microchip COM20020i


Microchip's COM20020ID is a member of the family of Embedded ARCNET Controllers from Standard Microsystems Corporation


  • Download » Datasheet, PDF, 417 Kb, 12-06-2006
    COM20020i Rev. D 5 Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
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    COM20020I Rev D
    5Mbps ARCNET (ANSI
    878.1) Controller with
    2K x 8 On-Chip RAM Datasheet Product Features
    ƒ ƒ New Features for Rev. D ƒ -Data Rates up to 5 Mbps
    -Programmable Reconfiguration Times 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 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 Self-Reconfiguration Protocol ƒ Supports up to 255 Nodes ƒ Supports Various Network Topologies (Star,
    Tree, Bus.) ƒ CMOS, Single +5V Supply ƒ Duplicate Node ID Detection ƒ Automatically Detects Type of
    Microcontroller Interface ƒ Powerful Diagnostics ƒ Receive All Packets Mode ƒ 2Kx8 On-Chip Dual Port RAM ƒ ƒ Command Chaining for Packet Queuing ƒ Sequential Access to Internal RAM ƒ Software Programmable Node ID Flexible Media Interface:
    -Traditional Hybrid Interface For Long
    Distances up to Four Miles at 2.5 Mbps
    -RS485 Differential Driver Interface For Low
    Cost, Low Power, High Reliability ORDERING INFORMATION
    Order Numbers:
    COM20020ILJP for 28 pin PLCC package ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)Production (Appropriate for new designs but newer alternatives may exist)




Deterministic Protocola, Token PassingYesYesYes
Max Speed, MHz5 Mbps5 Mbps5 Mbps
Op. Voltage, V5V5V5V
Operating Temperature Range, °C-40 to +85-40 to +85-40 to +85
Standalone Arcnet CntrlN/AN/AN/A
TX/RX RAM Buffer(Bytes)16K16K16K
Temp Range Max.(° C)858585
Temp Range Min.(° C)-40-40-40

Eco Plan


Moldel Line

Series: COM20020i (3)

Manufacturer's Classification

  • High-Speed Networking and Video > ARCNET

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