User's Guide

MC55i-W Hardware Interface Overview
6.2 Board-to-Board Connector
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MC55i-W_HIO_v01.301 Page 27 of 30 2011-3-8
Confidential / Released
6.2 Board-to-Board Connector
This section provides specifications for the 50-pin board-to-board connector which serves as
physical interface to the host application. The receptacle assembled on the MC55i-W PCB is
type Hirose DF12C. Mating headers from Hirose are available in different stacking heights.
Note: The headers listed above are without boss and metal fitting. Please contact Hirose for
details on other types of mating headers. Asterixed HRS numbers denote different types of
packaging.
Figure 3: Hirose DF12C receptacle on MC55i-W Figure 4: Header Hirose DF12 series
Table 16: Ordering information DF12 series
Item Part number Stacking
height (mm)
HRS number
Receptacle on MC55i-W DF12C(3.0)-50DS-0.5V(81) 3 - 5 537-0694-9-81
Headers DF12 series DF12E(3.0)-50DP-0.5V(81)
DF12E(3.5)-50DP-0.5V(81)
DF12E(4.0)-50DP-0.5V(81)
DF12E(5.0)-50DP-0.5V(81)
3.0
3.5
4.0
5.0
537-0834-6-**
537-0534-2-**
537-0559-3-**
537-0584-0-**
Table 17: Electrical and mechanical characteristics of the Hirose DF12C connector
Parameter Specification (50 pin board-to-board connector)
Number of contacts 50
Quantity delivered 2000 connectors per tape & reel
Voltage 50V
Rated current 0.3A max per contact
Resistance 0.05
 per contact
Dielectric withstanding voltage 500V RMS min
Operating temperature -45°C...+125°C
Contact material phosphor bronze (surface: gold plated)
Insulator material PA , beige natural
Stacking height 3.0 mm ; 3.5 mm ; 4.0 mm ; 5.0 mm
Insertion force 21.8N
Withdrawal force 1
st
10N
Withdrawal force 50
th
10N
Maximum connection cycles 50