SMSC TMC2005-JT - Manual (Page 19)

ARCNET 5 Port HUB Controller
Datasheet
SMSC TMC2005-JT Page 19 Revision 1.1 (07-24-07)
DATASHEET
Example 8: A sixteen ports HUB are composed by using four TMC2005. The EXT port between TMC2005 is made an
open-drain mode and it connects it (left example). Or put standard logic IC such as 74LS20 outside (right example).
This connected method is excellent in noised respect compared with connected method of open-drain mode.
FIGURE 8 - APPLICATION EXAMPLE 8
Only the four TMC2005s are indicated in the above figure. Connect the other pins adequately.
Note: Use the wiring pattern length that connects between four TMC2005s by five inches or less in open-drain mode.
Four TMC2005s is maximum in open-drain mode.
Data rate: 5Mbps and below Data rate: 10Mbps and below
or