COM20019I Datasheet PDF - SMSC Corporation
| Part Number | COM20019I | |
| Description | Low Cost ARCNET (ANSI 878.1) Controller | |
| Manufacturers | SMSC Corporation | |
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Product Features
New Features:
− Data Rates up to 312.5 Kbps
− Programmable Reconfiguration Times
28 Pin PLCC and 48 Pin TQFP Packages;
Green, Lead-free 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
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):
COM20019ILJP for 28 pin PLCC package; COM20019I-DZD for 28 pin PLCC package (green, lead-free)
COM20019I-HD for 48 pin TQFP package; COM20019I-HT for 48 pin TQFP package (green, lead-free)
SMSC COM20019I
Page 1
DATASHEET
Rev. 03-07-06
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Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM
Chapter 1 GENERAL DESCRIPTION
SMSC's COM20019I is a member of the family of Embedded ARCNET Controllers from Standard
Microsystems Corporation. The device is a general purpose communications controller for networking
microcontrollers and intelligent peripherals in industrial, automotive, and embedded control environments
using an ARCNET protocol engine. The flexible microcontroller and media interfaces, eight- page message
support, and extended temperature range of the COM20019I make it the only true network controller
optimized for use in industrial, embedded, and automotive applications. Using an ARCNET protocol
engine is the ideal solution for embedded control applications because it provides a deterministic token-
passing protocol, a highly reliable and proven networking scheme, and a data rate of up to 312.5 Kbps
when using the COM20019I.
A token-passing protocol provides predictable response times because each network event occurs within a
predetermined time interval, based upon the number of nodes on the network. The deterministic nature of
ARCNET is essential in real time applications. The integration of the 2Kx8 RAM buffer on-chip, the
Command Chaining feature, the maximum data rate, and the internal diagnostics make the COM20019I
the highest performance embedded communications device available. With only one COM20019I and one
microcontroller, a complete communications node may be implemented.
For more details on the ARCNET protocol engine and traditional dipulse signaling schemes,
please refer to the ARCNET Local Area Network Standard, available from Standard Microsystems
Corporation or the ARCNET Designer's Handbook, available from Datapoint Corporation.
For more detailed information on cabling options including RS485, transformer-coupled RS-485
and Fiber Optic interfaces, please refer to the following technical note which is available from
Standard Microsystems Corporation: Technical Note 7-5 - Cabling Guidelines for the COM20020
ULANC.
SMSC COM20019I
Page 5
DATASHEET
Rev. 03-07-06
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for COM20019I electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ COM20019I.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| COM20019 | The function is Low Cost ARCNET (ANSI 878.1) Controller. SMSC Corporation | |
| COM20019I | The function is Low Cost ARCNET (ANSI 878.1) Controller. SMSC Corporation | |
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