Embedian, Inc.
100
SMARC-iMX8MM Computer on Module User’s Manual
v. 1.2
spacer
for
the
5mm
stack
would
likely
be
a
standard
length.
Penn
Engineering
and
Manufacturing
(PEM)
(www.pemnet.com)
makes
surface
mount
spacers
with
M2.5
internal
threads.
The
product
line
is
called
SMTSO
(“surface
mount
technology
stand
offs”).
The
shortest
standard
length
offered
is
2mm.
A
custom
part
with
1.5mm
standoff
length,
M2.5
internal
thread,
and
5.56mm
standoff
OD
is
available
from
PEM.
The
Carrier
PCB
requires
a
4.22mm
hole
and
6.2mm
pad
to
accept
these
parts.
Other
vendors
such
as
RAF
Electronic
Hardware
(
www.rafhdwe.com
)
offer
M2.5
compatible
swaged
standoffs.
Swaged
standoffs
require
the
use
of
a
press
and
anvil
at
the
CM.
Their
use
is
common
in
the
industry.
The
standoff
OD
and
Carrier
PCB
hole
size
requirements
are
different
from
the
PEM
SMTSO
standoffs
described
above.
2.3.8.
Carrier
Connector
Figure
21:
MXM3
Carrier
Connector
