5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Table 1 - Typical Media
NOMINAL ATTENUATION PER 1000 FT.
CABLE TYPE
IMPEDANCE
AT 5 MHz
RG-62 Belden #86262
5.5dB
93Ω
RG-59/U Belden #89108
RG-11/U Belden #89108
IBM Type 1* Belden #89688
7.0dB
5.5dB
7.0dB
75Ω
75Ω
150Ω
IBM Type 3* Telephone Twisted
Pair Belden #1155A
17.9dB
16.0dB
100Ω
105Ω
COMCODE 26 AWG Twisted
Pair Part #105-064-703
*Non-plenum-rated cables of this type are also available.
Note: For more detailed information on Cabling options including RS-485, transformer-coupled RS-485 and Fiber Optic
interfaces, please refer to TN7-5 – Cabling Guidelines for the COM20020I ULANC, available from Standard
Microsystems Corporation.
SMSC COM20020I 3.3V
Page 23
Revision 12-06-06
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