User's Manual
Table Of Contents
- Contents
- Figures
- Tables
- Document history
- Introduction
- Product concept
- GSM application interface
- GSM/GPRS operating modes
- Power supply
- Power up / down scenarios
- Automatic GPRS Multislot Class change
- Charging control of the GSM part
- Power saving
- Summary of state transitions (except SLEEP mode)
- RTC backup for GSM part of XT55/56
- Serial interfaces of the XT55/56 GSM part
- Audio interfaces
- SIM interface
- Control signals
- GPS application interface
- GSM and GPS antenna interfaces
- Electrical, reliability and radio characteristics
- Mechanics
- Reference approval
- Example applications
- List of parts and accessories
XT55/56 Hardware Interface Description
Confidential / Released
s
XT55/56_hd_v02.06a Page 114 of 125 17.12.2004
7.3 Board-to-board connector
This chapter provides specifications for the 80-pin board-to-board connector which serves as
physical interface to the host application. The receptacle assembled on the XT55/56 PCB is
type Hirose DF12C. Mating headers from Hirose are available in different stacking heights.
Table 37: Ordering information DF12 series
Item Part number Stacking
height (mm)
HRS number
Receptacle on XT55/56 DF12C(3.0)-80DS-0.5V(81) 3.0 537-0733-9-81
Headers DF12 series DF12D(3.0)-80DP-0.5V(81)
DF12E(3.0)-80DP-0.5V(81)
3.0
3.0
537-0803-2-81
537-0838-7-81
Notes: 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.
Table 38: Electrical and mechanical characteristics of the Hirose DF12C connector
Parameter Specification (80 pin board-to-board connector)
Number of contacts 80
Quantity delivered 2000 connectors per tape & reel
Voltage 50V
Rated current 0.3A max per contact
Resistance 0.05 Ohm 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
Insertion force 21.8N
Withdrawal force 1
st
10N
Withdrawal force 50
th
10N
Maximum connection cycles 50