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SARA-G3 / SARA-U2 seriesGSM/GPRS and GSM/EGPRS/HSPA cellular modulesSystem integration manualAbstractThis document describes the features and the system integration of the SARA-G3 series GSM/GPRScellular modules and the SARA-U2 GSM/EGPRS/HSPA cellular modules. These modules arecomplete and cost-efficient solutions offering voice and/or data communication over diverse cellularradio access technologies in the same compact SARA form factor: the SARA-G3 series support upto four GSM/GPRS bands, while the SARA-U2 series support up to five high-speed HSPA bands andup to four GSM/EGPRS bands.UBX-13000995 - R29C1-Publicwww.u-blox.com

SARA-G3 / SARA-U2 series - System integration manualDocument informationTitleSARA-G3 / SARA-U2 seriesSubtitleGSM/GPRS and GSM/EGPRS/HSPA cellular modulesDocument typeSystem integration manualDocument numberUBX-13000995Revision and dateR29Disclosure restrictionC1-Public18-Jun-2021Product statusCorresponding content statusFunctional sampleDraftFor functional testing. Revised and supplementary data will be published later.In development /PrototypeObjective specificationTarget values. Revised and supplementary data will be published later.Engineering sampleAdvance informationData based on early testing. Revised and supplementary data will be published later.Initial productionEarly production informationData from product verification. Revised and supplementary data may be published later.Mass production /End of lifeProduction informationDocument contains the final product specification.This document applies to the following products:Product nameType numberModem version Application version PCN referenceProduct 340-02S-0108.90A01.13UBX-20057620End of 02A-0108.90A00.06UBX-21025409End of lifeSARA-G350-02A-0208.90A01.18UBX-21025409End of eSARA-G350-02S-0108.90A01.13UBX-21024405End of ARA-G350-02X-0108.90A01.13UBX-21024405End of lifeSARA-G310SARA-G340SARA-G340 ATEXSARA-G350SARA-G350 ATEXUBX-13000995 - R29C1-PublicDocument informationPage 2 of 218

SARA-G3 / SARA-U2 series - System integration manualProduct nameType numberModem version Application version PCN referenceProduct 0Mass leteSARA-U201-63B-0223.63A01.03UBX-20009160Mass bsoleteSARA-U201-04A-0123.60A01.07UBX-18053645Mass ass ass ass bsoleteSARA-U260-00S-0223.20A01.02UBX-17061316End of eSARA-U260-03S-0123.41A01.02UBX-17061316End of eSARA-U270-00S-0223.20A01.02UBX-17061316End of eSARA-U270-03A-0123.41A01.02UBX-17064001End of eSARA-U270-03S-0123.41A01.02UBX-17061316End of lifeSARA-U270-04B-0023.41A01.03UBX-19000858End of eSARA-U270-73S-0123.41A01.03UBX-17061316End of RA-U270-53S-0223.41A01.05UBX-17061316End of eSARA-U270-00X-0123.20A01.02UBX-17061316End of eSARA-U280-00S-0123.28A01.01UBX-17061316End of eSARA-U280-03S-0123.41A01.02UBX-17061316End of lifeSARA-U201 ATEXSARA-U260SARA-U270SARA-U270 ATEXSARA-U280u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this document.Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only permitted with theexpress written permission of u-blox.The information contained herein is provided “as is” and u-blox assumes no liability for its use. No warranty, either express orimplied, is given, including but not limited to, with respect to the accuracy, correctness, reliability and fitness for a particularpurpose of the information. This document may be revised by u-blox at any time without notice. For the most recent documents,visit www.u-blox.com.Copyright u-blox AG.UBX-13000995 - R29C1-PublicDocument informationPage 3 of 218

SARA-G3 / SARA-U2 series - System integration manualContentsDocument information . 2Contents . 41System description . 81.1 Overview . 81.2 Architecture .111.2.1Internal blocks .131.3 Pin-out .151.4 Operating modes .201.5 Supply interfaces .231.5.1Module supply input (VCC) .231.5.2RTC supply input/output (V BCKP) .311.5.3Generic digital interfaces supply output (V INT) .331.6 System function interfaces .341.6.1Module power-on .341.6.2Module power-off .381.6.3Module reset .401.6.4External 32 kHz signal input (EXT32K) .411.6.5Internal 32 kHz signal output (32K OUT) .411.7 Antenna interface .421.7.1Antenna RF interface (ANT) .421.7.2Antenna detection interface (ANT DET).431.8 SIM interface .441.8.1(U)SIM card interface .441.8.2SIM card detection interface (SIM DET) .441.9 Serial interfaces .451.9.1Asynchronous serial interface (UART) .461.9.2Auxiliary asynchronous serial interface (AUX UART) .601.9.3USB interface .631.9.4DDC (I2C) interface .671.10 Audio interface .691.10.1 Analog audio interface .691.10.2 Digital audio interface .701.10.3 Voice-band processing system .731.11 General Purpose Input/Output (GPIO) .761.12 Reserved pins (RSVD) .811.13 System features .821.13.1 Network indication .821.13.2 Antenna detection .821.13.3 Jamming detection .821.13.4 TCP/IP and UDP/IP .83UBX-13000995 - R29C1-PublicContentsPage 4 of 218

SARA-G3 / SARA-U2 series - System integration manual1.13.5 FTP .831.13.6 HTTP .831.13.7 SMTP .831.13.8 SSL/TLS .841.13.9 Dual stack IPv4/IPv6 .8521.13.10Smart temperature management .861.13.11AssistNow clients and GNSS integration .891.13.12Hybrid positioning and CellLocate .891.13.13Control Plane Aiding / Location Services (LCS) .911.13.14Bearer Independent Protocol .911.13.15Multi-Level Precedence and Pre-emption Service .921.13.16Network Friendly Mode .921.13.17Firmware upgrade Over AT (FOAT) .921.13.18Firmware update Over-The-Air (FOTA) .931.13.19Last gasp .931.13.20Smart radio Coverage Manager .931.13.21In-Band modem (eCall / ERA-GLONASS) .931.13.22SIM Access Profile (SAP) .941.13.23Power Saving .95Design-in . 972.1 Overview .972.2 Supply interfaces .982.2.1Module supply (VCC) .982.2.2RTC supply (V BCKP). 1112.2.3Interface supply (V INT) . 1132.3 System functions interfaces . 1142.3.1Module power-on (PWR ON) . 1142.3.2Module reset (RESET N) . 1152.3.332 kHz signal (EXT32K and 32K OUT) . 1162.4 Antenna interface . 1172.4.1Antenna RF interface (ANT) . 1172.4.2Antenna detection interface (ANT DET). 1242.5 SIM interface . 1272.6 Serial interfaces . 1342.6.1Asynchronous serial interface (UART) . 1342.6.2Auxiliary asynchronous serial interface (UART AUX) . 1402.6.3Universal Serial Bus (USB) . 1422.6.4DDC (I2C) interface . 1442.7 Audio interface . 1482.7.1Analog audio interface . 1482.7.2Digital audio interface . 1552.8 General Purpose Input/Output (GPIO) . 1592.9 Reserved pins (RSVD) . 160UBX-13000995 - R29C1-PublicContentsPage 5 of 218

SARA-G3 / SARA-U2 series - System integration manual2.10 Module placement . 1602.11 Module footprint and paste mask . 1612.12 Thermal guidelines . 1622.13 ESD guidelines . 1642.13.1 ESD immunity test overview . 1642.13.2 ESD immunity test of u-blox SARA-G3 and SARA-U2 reference designs . 1642.13.3 ESD application circuits . 1652.14 SARA-G3 / SARA-U2 ATEX modules integration in devices intended for use in potentiallyexplosive atmospheres . 1672.14.1 General guidelines . 1672.14.2 Guidelines for VCC supply circuit design . 1692.14.3 Guidelines for antenna RF interface design . 1702.15 Schematic for SARA-G3 / SARA-U2 series module integration . 1722.15.1 Schematic for SARA-G300 / SARA-G310 modules integration . 1722.15.2 Schematic for SARA-G340 / SARA-G350 modules integration . 1732.15.3 Schematic for SARA-U2 series modules integration . 1742.16 Design-in checklist. 1752.16.1 Schematic checklist . 1752.16.2 Layout checklist . 1762.16.3 Antenna checklist . 1763Handling and soldering . 1773.1 Packaging, shipping, storage and moisture preconditioning . 1773.2 Handling . 1773.3 Soldering . 1783.3.1Soldering paste . 1783.3.2Reflow soldering . 1783.3.3Optical inspection . 1793.3.4Cleaning . 1793.3.5Repeated reflow soldering . 1803.3.6Wave soldering . 1803.3.7Hand soldering . 1803.3.8Rework . 1803.3.9Conformal coating . 1803.3.10 Casting . 1813.3.11 Grounding metal covers . 1813.3.12 Use of ultrasonic processes . 1814Approvals. 1824.1 Product certification approval overview . 1824.2 US Federal Communications Commission notice . 1834.2.1Safety warnings review the structure . 1834.2.2Declaration of conformity . 1834.2.3Modifications . 1844.3 Innovation, Science and Economic Development Canada notice . 184UBX-13000995 - R29C1-PublicContentsPage 6 of 218

SARA-G3 / SARA-U2 series - System integration manual4.3.1Declaration of conformity . 1844.3.2Modifications . 1854.4 European conformance CE mark . 1864.5 Brazilian ANATEL certification . 1884.6 Australian Regulatory Compliance . 1884.7 Mexican IFT certification . 1894.8 Chinese CCC mark . 1894.9 Korean KCC certification . 1894.10 Taiwanese NCC certification . 1904.11 Japanese GITEKI certification . 1904.12 SARA-G3 / SARA-U2 ATEX modules conformance for use in explosive atmospheres . 1905Product testing . 1925.1 u-blox in-series production test . 1925.2 Test parameters for OEM manufacturers . 1925.2.1“Go/No go” tests for integrated devices . 1935.2.2Functional tests providing RF operation . 193Appendix . 196AMigration between LISA and SARA-G3 series . 196A.1 Overview . 196A.2 Checklist for migration . 197A.3 Software migration . 198A.4 Hardware migration . 198A.4.1 Supply interfaces . 198A.4.2 System functions interfaces . 199A.4.3 Antenna interface . 200A.4.4 SIM interface . 201A.4.5 Serial interfaces . 201A.4.6 Audio interfaces . 202A.4.7 GPIO pins . 203A.4.8 Reserved pins . 203A.4.9 Pin-out comparison between LISA and SARA-G3 . 204BMigration between SARA modules . 209B.1 Overview . 209B.2 Schematic for SARA-G3 /-U2 /-R4 /-N2 modules integration. 211CGlossary . 212Related documentation . 214Revision history . 216Contact . 218UBX-13000995 - R29C1-PublicContentsPage 7 of 218

SARA-G3 / SARA-U2 series - System integration manual1System description1.1 OverviewSARA-G3 series GSM/GPRS cellular modules and SARA-U2 series GSM/EGPRS/HSPA cellularmodules are versatile solutions offering voice and/or data communication over diverse radio accesstechnologies in the same miniature SARA LGA form factor (26 x 16 mm), which allows for seamlessdrop-in migration between the two SARA-G3 / SARA-U2 series and to and from the other u-bloxcellular modules families.SARA-G350 and SARA-G

UBX-13000995 - R29 C1-Public www.u-blox.com SARA-G3 / SARA-U2 series GSM/GPRS and GSM/EGPRS/HSPA cellular modules System integration manual Abstract This document describes the features and the system integration of the SARA-G3 series GSM/GPRS