Draft - NOT Good for Production


          HTM Card  THD  Components
         ---------------------------

                                         Rev.  5-Mar-2018


The purpose of this note is to describe all of the  Through
Hole Device  (THD)  components that the assembly vendor
needs to mount onto the HTM Card circuit board.

The HTM Card uses 6 types of THD components.  The following
tables lists all of the THD components and shows  how many of
each type are used  and  whether they are soldered into the
PCB holes  or  press-fit into the PCB holes.



 HTM Card  MSU        THD  Component:  Description,
  Part Number      Vendor Part No  &  Reference Desig.    Count    Mount
---------------    -----------------------------------    -----    -----

    Conn_2x8       16 Pin  Right Angle  2mm  Connector       1    Solder
                   4 Wall Header    THD Solder
                   Molex Part No.  87833-1620
                   Ref Desig:  J12


Conn_Condo_RJ45    Connector Dual RJ45 Ethernet              2    Press
                   THD  Press-In  Connector
                   TE Connectivity Part No.  1888653-4
                   Ref Desigs:  J13, J14


LEMO_EPK.00.250.NTN    Connector  Circular Coax              2    Solder
                       1 Pin  Center Conductor
                       4 Pins Shield
                       Lemo Part No.  EPK.00.250.NTN
                       Ref Desigs:  J15, J16


  TE_1766500-1     Connector  Male  34 Pins                  1    Press
                   ATCA Zone 1
                   THD  Press-In  Connector
                   TE Connectivity Part No.  1766500-1
                   Ref Desig:  P10


  TE_2065657-1     Connector  Female  80/160 Pins            1    Press
                   ATCA Zone 2
                   THD  Press-In  Connector
                   TE Connectivity Part No.  2065657-1
                   Ref Desigs:  J23


 SynQor_PQ60120    DCDC Converter  Iso 12V   THD             1    Solder
                   SynQor Part No.  PQ60120QEA25NNS-G
                   Ref Desig:  Power_12V



Concerns about the THD components:

 - The 3 types of Press-In connectors will require support
   on the back side of the PCB while they are being pressed
   in.  This support of the back side of the PCB can not
   interfere with any of the SMD components that are mounted
   there.

 - It is very important that the ATCA Zone 1 and Zone 2
   connectors are evenly and fully pressed in  and  that
   they are not overly pressed in and thus crushed.

 - The ATCA Zone 2 connectors have 160 rather small and
   easy to bend pins for a press-in component.

 - Failure to properly install the press-in Zone 1 and Zone 2
   backplane connectors would be a  big  problem for us.

 - The SynQor power module has some heavy high current pins
   that solder to multiple layers within the PCB.  These
   pins will be difficult to solder  high thermal mass
   connections.  Some pins on the 12 Volt DCDC converter
   carry up to 25 Amps and must be fully and properly
   soldered.


More information,  including installation instructions,  for
these THD components can be obtained from their manufacturer's
web sites.