   <td align="left">output</td>
   <td align="left">3.3-V LVTTL</td>
</tr>
<tr>
   <td align="left">HEX3[6]</td>
   <td align="left">AD20</td>
   <td align="left">output</td>
   <td align="left">3.3-V LVTTL</td>
</tr>
<tr>
   <td align="left">HEX4[0]</td>
   <td align="left">AD21</td>
   <td align="left">output</td>
   <td align="left">3.3-V LVTTL</td>
</tr>
<tr>
   <td align="left">HEX4[1]</td>
   <td align="left">AG22</td>
   <td align="left">output</td>
   <td align="left">3.3-V LVTTL</td>
</tr>
<tr>
   