User's Manual
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 3 Operating Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
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ELS31-/ELS51-US Hardware Interface Overview
2.1 Application Interface
29
ELS31-US_ELS51-US_HIO_v01.000a 2016-12-28
Confidential / Preliminary
Page 15 of 46
The figure below shows a circuit to connect an external SIM card holder.
Figure 5: External UICC/SIM/USIM card holder circuit
The total cable length between the SMT application interface pads on ELS31-US/ELS51-US
and the pads of the external SIM card holder must not exceed 100mm in order to meet the
specifications of 3GPP TS 51.010-1 and to satisfy the requirements of EMC compliance.
To avoid possible cross-talk from the CCCLK signal to the CCIO signal be careful that both
lines are not placed closely next to each other. A useful approach is using a GND line to shield
the CCIO line from the CCCLK line.
The ELS31-US/ELS51-US includes embedded ESD protection for the SIM interface that com-
plies to ETSI EN 301 489-1/7: Contact discharge: ± 4kV, air discharge: ± 8kV.
SIM
CCVCC
CCRST
CCIO
CCCLK
220nF
1nF
CCIN
V180