Telit Wireless Solutions SE868SY-D Guide

SE868SY-D
HW Design Guide
1VV0301705 Rev.5 –2021-12-15
Telit Technical Documentation

SE868SY-D Hardware Design Guide
1VV0301705 Rev. 5 Page 2of 44 2021-12-15
Not Subject to NDA
APPLICABILITY TABLE
PRODUCTS
SE868SY-D

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CONTENTS
APPLICABILITY TABLE 2
CONTENTS 3
1. INTRODUCTION 6
Scope 6
Audience 6
Contact Information, Support 6
Symbol Conventions 7
2. GENERAL PRODUCT DESCRIPTION 8
Overview 8
Product Variants and Supported Satellite Systems 8
Target Market 8
Block Diagram 9
Main Features 9
Mechanical Specifications 10
2.6.1. Dimensions 10
2.6.2. Weight 10
Temperature Range 10
Magnetic Field Immunity 10
3. PINS ALLOCATION 11
Pin-Out 11
LGA Pads Layout 13
Absolute Maximum Ratings 14
4. POWER SUPPLY 15
Power Supply Requirements 15
Power Consumption 15
General Design Rules 16
4.3.1. Electrical Design Guidelines 16
4.3.2. Power Supply PCB Layout Guidelines 17
5. DIGITAL SECTION 19

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Logic Levels 19
Communication Ports 19
5.2.1. Communication Interfaces to the Host MCU (HIF) 19
5.2.2. Host Interface Selection 20
Digital I/O 21
5.3.1. nRESET 21
5.3.2. LNA Enable 21
5.3.3. 1PPS 21
5.3.4. System ON 21
6. PRODUCT PERFORMANCE 22
Horizontal Position Accuracy 22
Time to First Fix 22
Sensitivity 22
7. RF SECTION 24
GNSS RF Signal Pin-Out 24
RF Front End Design 24
7.2.1. Reference Design for Passive Antenna 24
7.2.2. Reference Design for Active Antenna 25
7.2.3. Guidelines of PCB Line for GNSS Antenna 25
GNSS Antenna Requirements 26
7.3.1. GNSS Antenna Specification 26
7.3.2. GNSS Antenna –Installation Guidelines 26
7.3.3. Powering the External LNA (Active Antenna) 27
8. MECHANICAL DESIGN 28
Drawing 28
9. APPLICATION PCB DESIGN 29
Recommended Footprint for the Application 29
PCB Pad Design 30
Stencil 32
Solder Paste 32
Solder Reflow 32

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10. PACKAGING 34
Reel 34
Tray 35
11. CONFORMITY ASSESSMENT ISSUES 37
EU RED Declaration of Conformity 37
UKCA Declaration of Conformity 37
12. PRODUCT AND SAFETY INFORMATION 38
Copyrights and Other Notices 38
12.1.1. Copyrights 38
12.1.2. Computer Software Copyrights 38
Usage and Disclosure Restrictions 39
12.2.1. License Agreements 39
12.2.2. Copyrighted Materials 39
12.2.3. High Risk Materials 39
12.2.4. Trademarks 40
12.2.5. Third Party Rights 40
12.2.6. Waiver of Liability 40
Safety Recommendations 41
13. GLOSSARY 42
14. DOCUMENT HISTORY 43

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1. INTRODUCTION
Scope
This document introduces the SE868SY-D module and presents possible and
recommended hardware solutions for the development of a product based on this
module. All the features and solutions described in this document are applicable to all
the variants listed in the applicability table.
This document cannot include every possible hardware solution or product. Where the
suggested hardware configurations are not required, the information provided should be
used as a guide and starting point for the proper product development with the Telit
module.
Audience
This document is intended for Telit customers, especially system integrators, about to
implement their applications using our SE868SY-D modules.
Contact Information, Support
For general contact, technical support services, technical questions and report
documentation errors contact Telit Technical Support at:
• 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, i.e. YYYY-MM-DD.

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2. GENERAL PRODUCT DESCRIPTION
Overview
The SE868SY-D module, the latest addition to the xE868 family, is a multi-frequency and
multi-constellation GNSS receiver.
The SE868SY-D product uses the two GNSS bands L1 and L5 to achieve sub-meter
accuracy and reduce the multipath effects that are common in urban canyons.
The SE868SY-D operates at 1.8 V, minimizing power consumption even below L1-only
products and making it ideal for battery powered and wearable device applications.
Product Variants and Supported Satellite Systems
The SE868SY-D is available in two different ordering part numbers:
•Standard
•Low-power (requiring an external 0.8 V voltage supply on pin27)
Table 2, below lists the supported satellite systems, for both variants.
Product
Constellations
SE868SY-D
GPS (L1C/A; L5)
GLONASS (L1OF)
Galileo (E1B/C; E5a)
BeiDou (B1I; B1C; B2A)
QZSS (L1C/A, L1S1, L1C/B)
QZSS (L5)
NavIC (L5)
Note 1: Planning
Table 2: Product Variants and Supported Satellite Systems
Target Market
SE868SY-D, with its improved accuracy and ultra-low power consumption, can ideally be
applied to all positioning verticals such as:
•Telemetry
•Fleet managements
•Insurance telematics / Dashcams
•Asset/personal tracking
•Sport equipment

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•E-mobility
•Drones
Block Diagram
Figure 1: SE868SY-D Block Diagram
Main Features
Function
Features
GNSS
Multi-constellation and Multi-bands
Low power consumption
Geofence (in progress)
Real Time Clock
Interfaces
Main UART
SPI 1 / I2C
1PPS signal
LNA_EN
SYS_ON (only in low power P/N)
Single Antenna pin
External Sensors support1
External Flash support 1
Note 1: Planning
Table 3: Functional Features

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Mechanical Specifications
2.6.1. Dimensions
The overall dimensions of SE868SY-D are:
•Length: 11 mm
•Width: 11 mm
•Thickness: 2.8 mm
2.6.2. Weight
The nominal weight of the module is 1gram.
Temperature Range
Mode
Temperature
Notes
Operating Temperature Range
–40°C - +85°C
Storage and non-operating
Temperature Range
–40°C - +85°C
Table 4: Temperature Range
Magnetic Field Immunity
Since the SE868SY-D uses an embedded MRAM as an NVM (Non-Volatile Memory) for its
program code and data storage, the customer should consider the environment magnetic
field strength for good retention performance as shown in Table 5.
Item
Min.
Typ.
Max.
Unit
Notes
10-year data
retention
-
-
100
mT
In Deep Sleep or
Shutdown at 25° C
-
-
90
mT
In Deep Sleep or
Shutdown at 55° C
-
-
55
mT
In Deep Sleep or
Shutdown at 105° C
Active Read/Write
-
-
25
mT
In Exec or Idle
Table 5: Magnetic Field Immunity