SIM7020 _Hardware Design_V1.02
Smart Machine Smart Decision
Document Title
SIM7020 _Hardware Design
Version
Date
Status
1.02
2018-07-25
Release
Document Control ID
SIM7020 _ Hardware Design_V1.02
General Notes
SIMCom offers this information as a service to its customers to support the application and
engineering efforts that use the products designed by SIMCom. The information provided is based
on the requirements specifically from the customers. SIMCom has not undertaken any independent
search for additional relevant information, including any information that may be in the customer’s
possession. Furthermore, the system validation of the product designed by SIMCom within a larger
electronic system remains the responsibility of the customer or the customer’s system integrator.
All specifications supplied herein are subject to change without notice.
Copyright
This document contains the proprietary technical information which is the property of SIMCom
Limited, copying of this document, giving it to others, the using or communication of the contents
thereof are forbidden without the official authority by SIMCom. Offenders are liable to the
payment of the damages. All rights are reserved in the event of grant of a patent or the registration
of a utility model or design. All specifications supplied herein are subject to change without notice
Copyright © SIMCom Wireless Solutions Co., Ltd. 2018
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Contents
Contents .............................................................................................................................................2
Table Index ........................................................................................................................................4
Figure Index ......................................................................................................................................5
1
Introduction ................................................................................................................................7
1.1 Product Outline .....................................................................................................................7
1.2 Hardware Interface Overview ...............................................................................................7
1.3 Hardware Block Diagram......................................................................................................7
1.4 Functional Overview .............................................................................................................8
2 Package Information................................................................................................................10
2.1 Pin Assignment Overview ...................................................................................................10
2.2 Pin Description .................................................................................................................... 11
2.3 Mechanical Information ......................................................................................................14
2.4 Footprint Recommendation .................................................................................................15
3
Interface Application ...............................................................................................................16
3.1 Power Supply ......................................................................................................................16
3.2 Power Supply Design Guide ...............................................................................................16
3.3 Voltage Monitor...................................................................................................................17
3.4 Power on/Power off/Reset Function ....................................................................................17
Power on .......................................................................................................................17
3.4.1
3.4.2
Power off ......................................................................................................................19
3.4.3 Reset Function ..............................................................................................................20
3.5 UART Interface ...................................................................................................................21
3.5.1 UART Design Guide ....................................................................................................21
3.5.2 RI and DTR Behavior ...................................................................................................23
3.6 USB Interface ......................................................................................................................23
3.7 SIM Interface ......................................................................................................................24
3.7.1
SIM Application Guide ................................................................................................24
3.7.2 Recommended SIM Card Holder .................................................................................25
3.8 Network status .....................................................................................................................26
3.9 ADC ....................................................................................................................................26
3.10
Power Supply Output .......................................................................................................27
4 RF Specifications ......................................................................................................................29
4.1 LTE RF Specifications ........................................................................................................29
4.2 LTE Antenna Design Guide ................................................................................................30
4.3 RF traces note ......................................................................................................................31
4.3.1 RF traces layout ............................................................................................................31
4.3.2 LTE ANT and other system ANT decoupling ..............................................................33
5 Electrical Specifications ...........................................................................................................34
5.1 Absolute maximum ratings .................................................................................................34
5.2 Operating conditions ...........................................................................................................34
SIM7020_Hardware_Design_V1.02 2 2018-07-25
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5.3 Operating Mode ..................................................................................................................35
5.3.1 Operating Mode Definition ..........................................................................................35
5.3.2
Sleep mode ...................................................................................................................36
5.3.3 Minimum functionality mode and Flight mode ............................................................36
5.3.4
Power Saving Mode (PSM) ..........................................................................................37
5.3.5 Extended Mode DRX (e-DRX) ....................................................................................37
5.4 Current Consumption ..........................................................................................................37
5.5 ESD Notes ...........................................................................................................................38
6 SMT Production Guide ............................................................................................................39
6.1 Top and Bottom View of SIM7020 .....................................................................................39
6.2 Typical SMT Reflow Profile ...............................................................................................39
6.3 Moisture Sensitivity Level (MSL) ......................................................................................40
6.4 Baking Requirements ..........................................................................................................40
6.5 Stencil Foil Design Recommendation .................................................................................41
7 Packaging ..................................................................................................................................42
8 Appendix ...................................................................................................................................44
8.1 Related Documents .............................................................................................................44
8.2 Terms and Abbreviations .....................................................................................................46
8.3 Safety Caution .....................................................................................................................48
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Table Index
Table 1: SIM7020 frequency bands and air interface .................................................................7
Table 2: General features ............................................................................................................8
Table 3: Pin definition ............................................................................................................... 11
Table 4: IO parameters definition ............................................................................................. 11
Table 5: Pin description ............................................................................................................12
Table 6: VBAT pins electronic characteristic ............................................................................16
Table 7: Recommended TVS diode list ....................................................................................17
Table 8: Power on timing and electronic characteristic ............................................................18
Table 9: Power off timing and electronic characteristic ............................................................19
Table 10: RESET pin electronic characteristic .........................................................................20
Table 11: Recommended TVS list ............................................................................................23
Table 12: SIM electronic characteristic in 1.8V mode (SIM_VDD=1.8V) ..............................24
Table 13: SIM electronic characteristic 3.0V mode (SIM_VDD=3V)......................................24
Table 14: Amphenol SIM socket pin description ......................................................................26
Table 15: NETLIGHT pin status ...............................................................................................26
Table 16: ADC electronic characteristics ..................................................................................27
Table 17: Electronic characteristic ............................................................................................27
Table 18: Conducted transmission power .................................................................................29
Table19: Maximum Power Reduction (MPR) for UE category NB1 Power Class 3 ...............29
Table 20: E-UTRA operating bands ..........................................................................................29
Table 21: CAT-NB1 Reference sensitivity (QPSK) ..................................................................30
Table 22: Trace loss ..................................................................................................................30
Table 23: Recommended TVS ..................................................................................................31
Table 24: Absolute maximum ratings .......................................................................................34
Table 25: Recommended operating ratings ...............................................................................34
Table 26: 1.8V Digital I/O characteristics* ...............................................................................34
Table 27: Operating temperature ...............................................................................................35
Table 28: Operating mode Definition .......................................................................................35
Table 29: RTC_GPIO0/RTC_EINT characteristics ..................................................................37
Table 30: Current consumption on VBAT Pins (VBAT=3.3V) .................................................37
Table 31: The ESD performance measurement table ................................................................38
Table 32: Moisture Sensitivity Level and Floor Life ................................................................40
Table 33: Baking requirements .................................................................................................40
Table 34: Tray size ....................................................................................................................42
Table 35: Small Carton size ......................................................................................................43
Table 36: Big Carton size ..........................................................................................................43
Table 37: Related Documents ...................................................................................................44
Table 38: Terms and Abbreviations ...........................................................................................46
Table 39: Safety Caution ...........................................................................................................48
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Figure Index
Figure 1: SIM7020 block diagram ..............................................................................................8
Figure 2: Pin assignment overview ...........................................................................................10
Figure 3: Dimensions (Unit: mm) .............................................................................................14
Figure 4: Footprint recommendation (Unit: mm) .....................................................................15
Figure 5: Power supply application circuit ...............................................................................17
Figure 6: Reference power on/off circuit ..................................................................................18
Figure 7: Power on timing sequence .........................................................................................18
Figure 8: Power off timing sequence ........................................................................................19
Figure 9: Reference reset circuit ...............................................................................................20
Figure 10: UART full modem ...................................................................................................21
Figure 11: UART null modem ..................................................................................................21
Figure 12: Reference circuit of level shift ................................................................................22
Figure 13: TX level matching circuit ........................................................................................22
Figure 14: RX level matching circuit ........................................................................................22
Figure 15: RI behaviour (SMS and URC report) .................................................................23
Figure 16: USB reference circuit ..............................................................................................23
Figure 17: SIM interface reference circuit ................................................................................25
Figure 18: Amphenol SIM card socket .....................................................................................25
Figure 19: NETLIGHT reference circuit ..................................................................................26
Figure 20:Power on sequence of the VDD_EXT ...................................................................27
Figure 21:Power on sequence of the VDD_3V3 ....................................................................27
Figure 22: Antenna matching circuit (MAIN_ANT) ................................................................31
Figure 23: RF trace should be far away from other high speed signal lines .............................32
Figure 24: The distance between GND to the inner conductor of SMA ...................................32
Figure 25: Top and bottom view of SIM7020 ...........................................................................39
Figure 26: The ramp-soak-spike reflow profile of SIM7020 ....................................................39
Figure 27: Recommended SMT stencil footprint outline ..........................................................41
Figure 28: packaging diagram ..................................................................................................42
Figure 29: Tray drawing............................................................................................................42
Figure 30: Small carton drawing ...............................................................................................43
Figure 31: Big carton drawing ..................................................................................................43
SIM7020_Hardware_Design_V1.02 5 2018-07-25
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Revision History
Data
Version Description of change
2018-02-07
1.00
Original
2018-04-19
1.01
Update figure 1,9,20,21
Update table 2,8,9,10,16, 29,30
Update chapter 3.5.1
Add chapter 3.5.4, 3.5.5
Add table 28
2018-07-25
1.02
Update figure 1
Update table 2,6,21,30
Author
Ya.li
Ming.zhu
Ming.zhu
Ya.li
Ming.zhu
SIM7020_Hardware_Design_V1.02 6 2018-07-25
1 Introduction
This document describes SIM7020 hardware interface in great detail. The document can help
customer to quickly understand SIM7020 interface specifications, electrical and mechanical details.
With the help of this document and other SIM7020 application notes, customer guide, customers can
use SIM7020 to design various applications quickly.
1.1 Product Outline
The SIM7020 series modules support LTE CAT-NB1.
With a tiny configuration of 17.6*15.7*2.3mm, SIM7020 can meet almost all the space requirements
in customers’ applications, such as smart phone, PDA and other mobile devices. And the physical
dimension is compatible with the packaging of SIM800C.
Table 1: SIM7020 frequency bands and air interface
Standard
HD-FDD
Freque
ncy
B1
B3
B5
B8
B20
B28
Variants
SIM7020C
SIM7020E
1.2 Hardware Interface Overview
The interfaces are described in detail in the next chapters include:
Power Supply
USB Interface
UART Interface
SIM Interface
ADC
Power Output
GPIOs
Antenna Interface
1.3 Hardware Block Diagram
The block diagram of the SIM7020 module is shown in the figure below.