Telit Wireless Solutions SL871 Specification sheet

SL871 Family
Product User Guide
1VV0301170 Rev. 9 –2021-07-15
Telit Technical Documentation

SL871 Family Product User Guide
1VV0301170 Rev. 9 Page 2of 89 2021-07-15
Not Subject to NDA
APPLICABILITY TABLE
PRODUCTS
SL871
SL871L
SL871-S
SL871L-S

SL871 Family Product User Guide
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CONTENTS
APPLICABILITY TABLE 2
CONTENTS 3
1. INTRODUCTION 8
Scope 8
Audience 8
Contact Information, Support 8
Symbol Conventions 9
Related Documents 9
Related Documents Requiring a Non-Disclosure Agreement 9
2. PRODUCT DESCRIPTION 10
Product Overview 10
Product Naming 11
Product Variants 11
SL871-S and SL871L-S Features 11
2.3.1.1. ROM versions 12
SL871 Product Features Table 12
Block Diagrams 13
SL871 (Gen 2) Block Diagram 13
SL871L Block Diagram 14
SL871-S Block Diagram 14
SL871L-S Block Diagram 15
Module Photo 16
3. EVALUATION KIT 17
Evaluation Unit 18
4. PRODUCT FEATURES 19
Multi-Constellation Navigation (SL871 and SL871L only) 19
Quasi-Zenith Satellite System (QZSS) 19
Satellite-Based Augmentation System (SBAS) 19
SBAS Corrections 19

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Differential GPS (DGPS) (SL871 and SL871L only) 20
Assisted GPS (AGPS) 20
Locally generated AGPS - Embedded Assist System (EASY) 20
Server-generated AGPSS - Extended Prediction Orbit (EPO)20
Host EPO 21
10 Hz Navigation 21
Elevation Mask Angle 21
Static Navigation 21
Jamming Rejection –Active Interference Cancellation (AIC)22
Internal LNA (SL871L and SL871L-S only) 22
1PPS 23
Serial I/O Ports 23
Power Management Modes 23
Full Power Continuous Mode 24
Backup Mode (Perpetual) (SL871 and SL871L only) 24
Standby Modes 25
GLP Mode (SL871 and SL871L modules only) 25
Periodic Modes (SL871 and LS871L only) 26
AlwaysLocate™ Modes 28
5. DATA RETENTION 29
6. PRODUCT PERFORMANCE 30
Performance - SL871 and SL871L 30
Horizontal Position Accuracy - SL871 and SL871L 30
Time to First Fix - SL871 and SL871L 30
Sensitivity - SL871 (Gen 2) and SL871L 31
Performance - SL871-S and SL871L-S 31
Position Accuracy - SL871-S and SL871L-S 31
Time to First Fix - SL871-S and SL871L-S 32
Sensitivity - SL871-S and SL871L-S 32
Jamming Mitigation Performance Example 33
7. MESSAGE INTERFACE 34

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NMEA Output Messages 34
Standard Messages 34
Proprietary Output Messages 35
NMEA Input Commands 35
NMEA Commands List 36
8. FLASH UPGRADABLITY 37
9. ELECTRICAL INTERFACE 38
Pinout Diagrams and Tables 38
SL871 (Gen 2) and SL871L Pin-out Diagram and Table 38
SL871-S and SL871L-S Pin-out Diagram and Table 40
DC Power Supply 42
VCC 42
VBATT 42
VCC_RF 43
DC Power Requirements 43
DC Power Consumption - SL871 (Gen 2) 43
DC Power Consumption –SL871L 44
DC Power Consumption - SL871-S 44
DC Power Consumption - SL871L-S 45
Digital Interface Signals 45
I/O Signal Levels 45
9.3.1.1. Logic Levels - Inputs 45
9.3.1.2. Logic Levels - Outputs 46
Antenna Related Signals 46
9.3.2.1. VCC-RF (Active Antenna Supply Voltage) (SL871 and SL871-S only) ..............46
9.3.2.2. ANT-ON (output) 47
9.3.2.3. ANT-OC (SL871 and SL871L only) 47
9.3.2.4. ANT-SC-N (SL871 and SL871L only) 47
Control (Input) Signals 47
9.3.3.1. RESET-N 47
9.3.3.2. FORCE-ON (SL871 and SL871L only). 48
Output Signals 48

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9.3.4.1. 1PPS 48
Serial I/O Ports 49
Serial Port Usage 49
9.4.1.1. Primary (Port 0) Usage 49
9.4.1.2. Secondary Port Usage 49
UART Port Operation 50
I2C Port Operation (SL871 and SL871L only) 50
Antenna RF Interface 52
RF-IN 52
Frequency Plan 52
Burnout Protection 52
Jamming Rejection –Active Interference Cancellation 53
10. RF FRONT-END DESIGN 54
RF Signal Requirements 54
GNSS Antenna Polarization 56
Active versus Passive Antenna 56
GNSS Antenna Gain 56
System Noise Floor 57
RF Trace Losses 58
PCB Stack and Trace Impedance 58
Input to the Pre-select SAW Filter (SL8721 Gen 2 and SL871-S only) 59
Input to the LNA (SL871L AND SL871L-S only) 59
Powering an External LNA (or active antenna) 59
RF Interference 60
Shielding 61
11. REFERENCE DESIGN 62
12. MECHANICAL DRAWING 64
13. PCB FOOTPRINT 65
14. PACKAGING & HANDLING 66
Product Marking and Serialization 66
Product Packaging 67

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Moisture Sensitivity 68
ESD Sensitivity 69
Assembly Considerations 70
Washing Considerations 70
Reflow 70
Disposal 72
Safety 72
15. ENVIRONMENTAL REQUIREMENTS 73
Operating Environmental Limits 73
Storage Environmental Limits 73
16. COMPLIANCES 74
EU (RED) Declarations of Conformity 75
EU (RED) Declaration of Conformity –SL871 75
EU (RED) Declaration of Conformity –SL871L 76
EU (RED) Declaration of Conformity –SL871-S 77
EU (RED) Declaration of Conformity –SL871L-S 78
17. PRODUCT AND SAFETY INFORMATION 79
Copyrights and Other Notices 79
Copyrights 79
Computer Software Copyrights 79
Usage and Disclosure Restrictions 80
License Agreements 80
Copyrighted Materials 80
High Risk Materials 80
Trademarks 81
Third Party Rights 81
Waiver of Liability 81
Safety Recommendations 82
18. GLOSSARY 83
19. DOCUMENT HISTORY 87

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1. INTRODUCTION
Scope
The purpose of this document is to provide information regarding the function, features,
and usage of the Telit products listed in Applicability Table.
Please refer to chapter 2. Product Description for details of product features and product
variants.
Audience
This document is intended for Telit customers, especially system integrators, about to
implement their applications using the Telit SL871 family.
Contact Information, Support
For general contact, technical support services, technical questions and report of
documentation errors contact Telit Technical Support at:
• TS[email protected]
• TS[email protected]
• TS[email protected]
• TS[email protected]
• TS[email protected]
Alternatively, use:
https://www.telit.com/contact-us
For detailed information about where you can buy the Telit modules or for
recommendations on accessories and components visit:
https://www.telit.com
Our aim is to make this guide as helpful as possible. Keep us informed of your comments
and suggestions for improvements.
Telit appreciates the user feedback on our information.

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Symbol Conventions
Danger: This information MUST be followed or catastrophic
equipment failure or personal injury may occur.
Warning: Alerts the user on important steps about the module
integration.
Note/Tip: Provides advice and suggestions that may be useful when
integrating the module.
Electro-static Discharge: Notifies the user to take proper grounding
precautions before handling the product.
Table 1: Symbol Conventions
All dates are in ISO 8601 format, that is YYYY-MM-DD.
Related Documents
•Datasheets
•Product User Guides
•EVK User Guides
•Software User Guides
•Application Notes
•TelitView installation and documentation
Related Documents Requiring a Non-Disclosure Agreement
•Authorized Software User Guides
•Product firmware

SL871 Family Product User Guide
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Not Subject to NDA
2. PRODUCT DESCRIPTION
The SL871 family of GNSS receiver modules provides complete position, velocity, and
time (PVT) engines featuring high performance, high sensitivity, and low power
consumption.
All modules compute a navigation solution using GPS signals. Multi-constellation
modules add GLONASS, BeiDou, and Galileo signals to yield better coverage, greater
accuracy, and improved availability.
Multi-constellation (MT3333-based): SL871 and SL871L
GPS only (MT3337E-based): SL871-S and SL871L-S.
Product Overview
•Complete GNSS receiver modules including memory, TCXO, and RTC
•SL871L and SL871L-S modules also include a built-in LNA and DC blocking cap
•Constellations:
oSL871x: GPS (L1), QZSS, and either Glonass (L1) or BeiDou (B1)
simultaneous ranging with 99 search and 33 tracking channels. Galileo
ready.
oSL871x-S: GPS (L1) and QZSS ranging with 66 search and 22 tracking
channels.
•SBAS corrections capable (WAAS, EGNOS, MSAS, GAGAN) (SL871x only)
•DGPS capable using the RTCM SC-104 protocol
•AGPS support for extended ephemeris using local or server-based solutions:
oLocal: Embedded Assist System (EASY) 1
oServer: Extended Prediction Orbit (EPO) 1
•Jamming Rejection: Active Interference Cancellation (AIC)
•Supports active or passive antenna
•NMEA command input and data output
•Configurable fix reporting - Default: 1Hz, Max: 10 Hz
•Two serial ports for input commands and output messages
oSL871L: Second serial port is I2C interface, configurable for UART via
command
•1PPS output
•Memory: