LENA-R8 series - System integration manual
UBX-22015376 - R02
Design-in
Page 67 of 116
C1-Public
GND
U1
97
Z2
L1
C1
C2
L2
Z1
Z3
(b)
LENA-R8 series
ANT
GND
U1
RFCTRL1
RFCTRL2
Z1
Z2
L1
C1
C2
L2
(a)
LENA-R8 series
ANT
RFCTRL1
RFCTRL2
98
97
98
Figure 44: Examples of schematics for cellular antenna dynamic impedance tuning (a) and aperture tuning (b).
Manufacturer
Part number
Description
Peregrine Semiconductor
PE42442
30..6000 MHz UltraCMOS SP4T RF switch
Skyworks Solutions
SKY13380-350LF
20..3000 MHz SP4T high-power RF switch
AVX / Ethertronics
EC646
100..3000 MHz ultra-small SP4T RF switch
AVX / Ethertronics
EC686-3
100..3000 MHz ultra-low R
ON
SP4T RF switch
Qorvo
RF1654A
100..2700 MHz SP4T RF switch
Table 32: Examples of RF switches for cellular antenna dynamic tuning
2.5
Cellular SIM interface
2.5.1.1
Guidelines for SIM circuit design
Guidelines for SIM cards, SIM connectors and SIM chips selection
The ISO/IEC 7816, the ETSI TS 102 221 and the ETSI TS 102 671 specifications define the physical,
electrical and functional characteristics of Universal Integrated Circuit Cards (UICC) which contains
the Subscriber Identification Module (SIM) integrated circuit that securely stores all the information
needed to identify and authenticate subscribers over the cellular network.
Removable UICC / SIM card contacts mapping is defined by ISO/IEC 7816 and ETSI TS 102 221 as
follows:
•
Contact C1 = VCC (Supply)
→
It must be connected to
VSIM
•
Contact C2 = RST (Reset)
→
It must be connected to
SIM_RST
•
Contact C3 = CLK (Clock)
→
It must be connected to
SIM_CLK
•
Contact C4 = AUX1 (Auxiliary contact)
→
It must be left not connected
•
Contact C5 = GND (Ground)
→
It must be connected to
GND
•
Contact C6 = VPP/SWP (Other function)
→
It can be left not connected
•
Contact C7 = I/O (Data input/output)
→
It must be connected to
SIM_IO
•
Contact C8 = AUX2 (Auxiliary contact)
→
It must be left not connected
A removable SIM card can have 6 contacts (C1, C2, C3, C5, C6, C7) or 8 contacts, also including the
auxiliary contacts C4 and C8. Only 6 contacts are required and must be connected to the module SIM
interface.
Removable SIM cards are suitable for applications requiring a change of SIM card during the product
lifetime.
A SIM card holder can have 6 or 8 positions if a mechanical card presence detector is not provided, or
it can have 6+2 or 8+2 positions if two additional pins relative to the normally-open mechanical switch
integrated in the SIM connector for the mechanical card presence detection are provided. Select a SIM
connector providing 6+2 or 8+2 positions if the optional SIM detection feature is required by the
