3M
™
Pak 50 Stacking Compression Connector
130 Position
388 Series
• No solder joints, compression stacking
connector
• Standardized interface for Intel Modular
Interface eXtension (MIX) Bus (module to
module and module to baseboard connector)
• Connector heights tailored for Multibus
II environment
• 130 contacts to fully accommodate ‘‘MIX''
bus signals
• RoHS* compliant
Date Modified: February 15, 2005
TS-0422-13
Sheet 1 of 5
Physical
Insulation
Material: Glass Filled Polyester (PPS)
Flammability: UL 94V-0
Color: Black
Marking:
3M Logo & Ink Stamped Part Number
Stiffener
Material: Spring Steel
Coating: Black Epoxy
Contact
Material: Beryllium Copper
Plating
Underplating: 50
µ″
(1.27
µm)
Nickel - QQ-N-290, Class 2
Wiping Area: 30
µ″
(0.76
µm)
Gold - MIL-G-45204, Type II, Grade C
Electrical
Current Rating:
1 A
Insulation Resistance:
> 1
×
10
9
Ω
at 500 VDC
Withstanding Voltage:
30 V
Environmental
Temperature Rating:
-55°C to +105°C
UL File No.: E68080
3M
Interconnect Solutions
http://www.3M.com/interconnects/
*RoHS = Directive 2002/95/EC,
Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
3M
™
Pak 50 Stacking Compression Connector
130 Position
388 Series
Position 98
Position 130
Position 99
Position 66
33
32
33
32
Number of Contacts
Position 34
Position 65
Position 33
Position 1
3.01 Ref
[ 76.5 ]
.127
[ 3.23 ]
.04
[ 1.0 ]
.415 Ref
[ 10.54 ]
.738
[ 18.75 ]
.022 Typ
[ 0.56 ]
∅
.060
×
.050 Polarizing Post (Qty 1)
MFGR ident, part no. &
date code to be located
on this surface
64 Equal Spaces @
.04 = 2.56
[ 65.0 ]
.080
[ 2.03 ]
.100
[ 2.54 ]
.275
[ 6.98 ]
.37
[ 3.48 ]
.225
[ 5.72 ]
.55
[ 14.0 ]
3.01
[ 76.5 ]
.13
[ 3.2 ]
In c h
[m m ]
T o le ra n c e U n le s s N o te d
.0
in c h
± .1
.0 0
.0 0 0
± .0 1 ± .0 0 5
3.27
[ 83.1 ]
Note:
1. Each connector includes (4) jackscrews, 3M #3342-7 (See next page) .
[ ] D im e n s io n s fo r R e fe re n c e
O n ly
Ordering Information
3884-000A
TS-0422-13
Sheet 2 of 5
3M
Interconnect Solutions
http://www.3M.com/interconnects/
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
3M
™
Pak 50 Stacking Compression Connector
130 Position
388 Series
#4-40 UNC
.19
[ 7.480 ]
.05
[ 2.0 ]
.38
[ 9.7 ]
#4-40 UNC
.56
[ 14.2 ]
Jackscrew, Stainless Steel
3M# 3342-7
(See note 1)
TS-0422-13
Sheet 3 of 5
3M
Interconnect Solutions
http://www.3M.com/interconnects/
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
3M
™
Pak 50 Stacking Compression Connector
130 Position
Board and Footprint Specification
388 Series
Board
Material:
Thickness:
Pad
Material:
Size:
Thickness:
Underplating:
Plating:
G10 Glass Filled Epoxy
.062″
±
.0008″
1.0 ounce Copper
.055″ x .090″ Oval
.0012″ minimum
100
µ″
(2.54
µm)
Nickel - QQ-N-290
30
µ″
(0.76
µm)
Gold - MIL-G-45204, Type II, Grade C,
130-220 Knoop hardness
MIX Connector Footprint
pad and hole locations
Primary and Secondary Sides
(Viewed from primary side)
Oval SMT Pad
Detail
Slot Detail
(NPTH)
TS-0422-13
Sheet 4 of 5
3M
Interconnect Solutions
http://www.3M.com/interconnects/
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
3M
™
Pak 50 Stacking Compression Connector
130 Position
MIX Connector Footprint
Via Locations
Primary and Secondary
Sides
(Viewed from primary side)
388 Series
MIX Connector Footprint
Gold and Non-Gold Zones
3.140 [ 79.76 ]
Non-Gold
plated zone
-A-
Zone of no metallization
4X .050 [ 1.27 ] Min
(See note 2)
.130 Min
[ 3.30 ]
.415 Min
[ 10.54 ]
-B-
.140 [ 3.56 ] Min
Gold plated zone
(See note 3)
Notes:
2. Zone of no metallization is to be clear of any copper on the primary and secondary sides.
3. Gold plated zone is to be clear of any vias other than the established via pattern.
TS-0422-13
Sheet 5 of 5
3M
Interconnect Solutions
http://www.3M.com/interconnects/
3M is a trademark of 3M Company.
For technical, sales or ordering information call
800-225-5373
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