SMSC TMC2005-JT FIGURE 8 - APPLICATION EXAMPLE

ARCNET 5 Port HUB Controller

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.

Data rate: 5Mbps and below

Data rate: 10Mbps and below

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.

SMSC TMC2005-JT

Page 19

Revision 1.1 (07-24-07)

DATASHEET

Contents

FEATURES GENERAL DESCRIPTION ORDERING INFORMATION Page TABLE OF CONTENTS PIN CONFIGURATION BLOCK DIAGRAM DESCRIPTION OF PIN FUNCTIONS TX/RX Interface FEATURE Operating Mode Setup INPUT PLL Must always connect to VDD Other Signals FEATURES OPERATIONAL DESCRIPTION Direction Determination Direction Release Jitter Filter 1)Input Sampling Option Feature for Jitter Filtering 1)Big jitter (BJ) mode Note: [Complement] 2)Changing polar of RX port APPLICATION NOTES FIGURE 2 - APPLICATION EXAMPLE FIGURE 3 - APPLICATION EXAMPLE FIGURE 4 - APPLICATION EXAMPLE FIGURE 5 - APPLICATION EXAMPLE FIGURE 6 - APPLICATION EXAMPLE FIGURE 7 - APPLICATION EXAMPLE FIGURE 8 - APPLICATION EXAMPLE PORT GROUP CONNECTING THE TMC2005 WITH INTERNAL PLL Method To Connect A Crystal Clock FIGURE 11 - CONNECTING THE CRYSTAL CLOCK Note 1: Note 2: nPLLTST pin CASCADING CONNECTION FIGURE 13 - CASCADE CONNECTION OF 8 PORT HUB FIGURE 14 - CASCADE CONNECTION OF 8 PORT HUB FIGURE 15 - CASCADE CONNECTION OF 16 PORT HUB Ring Network With the TMC2005 FIGURE 16 - RING CONFIGURATION Example for system hang-up Example for no hang-up Note 3: MAXIMUM GUARANTEED RATINGS Vss ITEM SYMBOL RATING DC CHARACTERISTIC - OUTPUT PIN PIN AC CHARACTERISTIC - CLOCK and RESET TYP FIGURE 17 - CLOCK AND RESET AC CHARACTERISTIC – Rx waveforms and Tx waveforms FIGURE 18 - RX WAVEFORMS AND TX WAVEFORMS ITEMS MARK REMARK Page TMC2005-JT64 PIN TQFP PACKAGE OUTLINE