LISA-U2 series - System integration manual
UBX-13001118 - R27
System description
Page 52 of 183
C1-Public
•
Limit capacitance and series resistance on each SIM signal (
SIM_CLK
,
SIM_IO
,
SIM_RST
) to
match the requirements for the SIM interface (27.7 ns is the maximum allowed rise time on the
SIM_CLK
line, 1.0 µs is the maximum allowed rise time on the
SIM_IO
and
SIM_RST
lines).
LISA-U2 series
C1
FIRST
SIM CARD
VPP (C6)
VCC (C1)
IO (C7)
CLK (C3)
RST (C2)
GND (C5)
C2 C3
C5
J1
C4
D1 D2 D3 D4
GND
U1
50
VSIM
VSIM
1VSIM
2VSIM
VCC
C11
4PDT
Analog
Switch
3V8
48
SIM_IO
DAT
1DAT
2DAT
47
SIM_CLK
CLK
1CLK
2CLK
49
SIM_RST
RST
1RST
2RST
SEL
SECOND
SIM CARD
VPP (C6)
VCC (C1)
IO (C7)
CLK (C3)
RST (C2)
GND (C5)
J2
C6 C7 C8
C10
C9
D5 D6 D7 D8
Application
Processor
GPIO
R1
Figure 24: Application circuit for connection to two removable SIM cards, with SIM detection implemented
Reference Description
Part Number - Manufacturer
C1
–
C4,
C6
–
C9
33 pF Capacitor Ceramic C0G 0402 5% 25 V
GRM1555C1H330JZ01 - Murata
C5, C10,
C11
100 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C104KA01 - Murata
D1
–
D8
Very Low Capacitance ESD Protection
PESD0402-140 - Tyco Electronics
R1
47 k
Ω
Resistor 0402 5% 0.1 W
RC0402JR-0747KL- Yageo Phycomp
J1, J2
SIM Card Holder
6 positions, without card presence switch
Various Manufacturers,
C707 10M006 136 2 - Amphenol
U1
4PDT Analog Switch,
with Low On-Capacitance and Low On-Resistance
FSA2567 - Fairchild Semiconductor
Table 25: Example of components for connection to two removable SIM cards, with SIM detection implemented