Ublox SARA-R5 Series System Integration Manual

SARA-R5 series - System integration manual
UBX-19041356 - R04 Design-in Page 77 of 118
C1-Public
2.5.1.2 Guidelines for single SIM card connection without detection
A removable SIM card placed in a SIM card holder must be connected to the SIM card interface of
SARA-R5 series modules as described in Figure 51, where the optional SIM detection feature is not
implemented.
Follow these guidelines to connect the module to a SIM connector without SIM presence detection:
• Connect the UICC / SIM contact C1 (VCC) to the VSIM pin of the module.
• Connect the UICC / SIM contact C7 (I/O) to the SIM_IO pin of the module.
• Connect the UICC / SIM contact C3 (CLK) to the SIM_CLK pin of the module.
• Connect the UICC / SIM contact C2 (RST) to the SIM_RST pin of the module.
• Connect the UICC / SIM contact C5 (GND) to ground.
• Provide a 100 nF bypass capacitor (e.g. Murata GRM155R71C104K) on SIM supply line, close to the
relative pad of the SIM connector, to prevent digital noise.
• Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GCM1555C1H470JA16) on each
SIM line, very close to each related 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 PESD0402-140) on
each externally accessible SIM line, close to each relative pad of the SIM connector. ESD sensitivity
rating of the SIM interface pins is 1 kV (HBM). So that, according to 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 to match the requirements for the SIM
interface regarding maximum allowed rise time on the lines.
SARA-R5 series
41
VSIM
39
SIM_IO
38
SIM_CLK
40
SIM_RST
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
D1 D2 D3 D4
C
8
C
4
Figure 51: Application circuit for the connection to a single removable SIM card, with SIM detection not implemented
Reference
Description
Part number - Manufacturer
C1, C2, C3, C4
47 pF capacitor ceramic C0G 0402 5% 50 V
GCM1555C1H470JA16 - Murata
C5
100 nF capacitor ceramic X7R 0402 10% 16 V
GCM155R71C104KA55 - Murata
D1, D2, D3, D4
Very low capacitance ESD protection
PESD0402-140 - Tyco Electronics
J1
SIM card holder, 6 positions, without card presence switch
Generic manufacturer,
as C707 10M006 136 2 - Amphenol
Table 33: Example of components for the connection to a single removable SIM card, with SIM detection not implemented

Ublox SARA-R5 Series Specifications

General

Brand	Ublox
Model	SARA-R5 Series
Category	Control Unit
Language	English