u-blox SARA-G3 Series User Manual

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification Design-in
Page 125 of 218
 Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM
line (VSIM, SIM_CLK, SIM_IO, SIM_RST), very close to each relevant pad of the SIM connector,
to prevent RF coupling especially in case the RF antenna is placed closer than 10 - 30 cm from the
SIM card holder
 Provide a very low capacitance (i.e. less than 10 pF) ESD protection (e.g. Tyco Electronics
PESD0402-140) on each externally accessible SIM line, close to each relevant pad of the SIM
connector: ESD sensitivity rating of the SIM interface pins is 1 kV (Human Body Model according to
JESD22-A114), so that, according to the EMC/ESD requirements of the custom application, higher
protection level can be required if the lines are externally accessible on the application device
 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)
SARA-G3 series
41
VSIM
39
SIM_IO
38
SIM_CLK
40
SIM_RST
4
V_INT
42
SIM_DET
SIM CARD
HOLDER
C
5
C
6
C
7
C
1
C
2
C
3
SIM Card
Bottom View
(contacts side)
C1
VPP (C6)
VCC (C1)
IO (C7)
CLK (C3)
RST (C2)
GND (C5)
C2 C3 C5
J1
C4
SW1
SW2
D1 D2 D3 D4 D5 D6
R2
R1
C
8
C
4
TP
Figure 45: Application circuit for the connection to a single removable SIM card, with SIM detection implemented
Reference
Description
Part Number - Manufacturer
C1, C2, C3, C4
47 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1H470JA01 - Murata
C5
100 nF Capacitor Ceramic X7R 0402 10% 16 V
GRM155R71C104KA01 - Murata
D1, D2, D3,
D4, D5, D6
Very Low Capacitance ESD Protection
PESD0402-140 - Tyco Electronics
R1
1 k Resistor 0402 5% 0.1 W
RC0402JR-071KL - Yageo Phycomp
R2
470 k Resistor 0402 5% 0.1 W
RC0402JR-07470KL- Yageo Phycomp
J1
SIM Card Holder
6 + 2 positions, with card presence switch
Various Manufacturers,
CCM03-3013LFT R102 - C&K Components
Table 25: Example of components for the connection to a single removable SIM card, with SIM detection implemented
Guidelines for dual SIM card connection with detection
SIM card detection is not supported by SARA-G300-00S and SARA-G310-00S modules.
Two removable SIM card placed in two different SIM card holders must be connected to the SIM card
interface of SARA-G3 modules as described in Figure 46Figure 46, providing also the SIM card detection
feature.

u-blox SARA-G3 Series Specifications

General

Brand	u-blox
Model	SARA-G3 Series
Category	GSM/GPRS Modules
Language	English