Datasheet

 2010 Microchip Technology Inc. DS51194S-page 21
Transition Socket Specification
RECOMMENDED INSTALLATION OF
TRANSITION SOCKETS WITH
CABLES
For transition sockets that use a cable, follow these
instructions for installing your transition socket on the
target board.
PCB Layout Considerations:
Make sure you leave enough room on the PCB to
accommodate the cable, i.e., space your target pads
for each device far enough apart so that the cable from
one pad group will not interfere with another pad group.
6-Pin SOT Solder Instructions:
1. Remove protective cable covering from end of
cable.
2. Position cables on target board (see below).
Tape down to prevent movement.
3. Solder each lead to target pad.
4. Remove tape and clean.
8-Pin DFN Solder Instructions:
1. Prepare leads by trimming narrowest portion to
0.10-inch maximum in length (see below).
2. Position cables on target board (see below).
Tape down to prevent movement.
3. Solder each lead to target pad.
4. Remove tape and clean.
8-Pin DFN Assembly Instructions:
1. Start with cable associated with pin 1.
2. Fold cable up and over, forming a radius.
3. Mate with the header on the side of the transition
socket assembly, making sure pin 1 mates with
the pin labeled “DFN Pin 1”.
4. Fold over and mate the other cable.
16-Pin QFN Solder Instructions:
1. Remove protective cable jacket from stripped
end of cable.
2. Lay out the four cables in a “+” pattern (see
below).
3. Center each cable on the footprint (see below).
Tape down each cable to prevent movement.
4. Solder each lead to target pad.
5. Remove tape and clean
16-Pin QFN Assembly Instructions:
1. Start with cable associated with pin 1.
2. Fold cable up and over, forming a radius.
Header pins will now be facing upwards.
3. Mate with the socket on the underside of the
transition socket assembly, making sure pin 1
mates with the pin labeled “QFN Pin 1”.
4. Fold over and mate the other cables.
28/44-Pin QFN Solder Instructions:
1. Remove protective cable jacket from stripped
end of cable.
2. Lay out with long cables opposing each other
and short cables opposing each other (see
below).
3. Place center lead (6th lead for 44-pin, 4th lead
for 28-pin) on center target pad to center each
cable on the footprint (see below). Tape down
each cable to prevent movement.
4. Solder each lead to target pad.
5. Remove tape and clean
28/44-Pin QFN Assembly Instructions:
1. Start with cable associated with pin 1.
2. Fold cable up and over, forming a radius.
Header pins will now be facing upwards.
3. Mate with the socket on the underside of the
transition socket assembly, making sure pin 1
mates with the pin labeled “QFN Pin 1”.
4. Fold over and mate the other cables.
pin 1
trim leads
pin 1
pin 1
header pins
facing down
center cable
on target footprint
pin 1
use center lead
to center cable
on target footprint
short short
long
long
header pins
facing down