Smart Machine Smart Decision
SIM800_Hardware Design_V1.10 4 2018-08-13
4.15. PWM....................................................................................................................................................... 45
4.16. Network Status Indication ...................................................................................................................... 46
4.17. Operating Status Indication .................................................................................................................... 47
4.18. KPLED ................................................................................................................................................... 47
4.19. RF Synchronization Signal ..................................................................................................................... 48
4.20. Antenna Interface ................................................................................................................................... 48
4.20.1. GSM Antenna Interface ................................................................................................................... 49
4.20.2. Bluetooth Antenna Interface ............................................................................................................ 50
5. PCB Layout .................................................................................................................................................. 51
5.1 PIN Assignment ...................................................................................................................................... 51
5.2 Principle of PCB Layout ......................................................................................................................... 51
5.2.1 Antenna ............................................................................................................................................... 51
5.2.2. Power Supply ...................................................................................................................................... 51
5.2.3 SIM Card Interface .............................................................................................................................. 51
5.2.4 Audio Interface .................................................................................................................................... 52
5.2.5 Others .................................................................................................................................................. 52
5.3 Recommended PCB Layout ................................................................................................................... 52
6. Electrical, Reliability and Radio Characteristics ..................................................................................... 53
6.1 Absolute Maximum Ratings ................................................................................................................... 53
6.2 Recommended Operating Conditions ..................................................................................................... 53
6.3 Digital Interface Characteristics ............................................................................................................. 53
6.4 SIM Card Interface Characteristics ........................................................................................................ 54
6.5 SIM_VDD Characteristics ...................................................................................................................... 54
6.6 VDD_EXT Characteristics ..................................................................................................................... 54
6.7 VRTC Characteristics ............................................................................................................................. 54
6.8 Current Consumption (VBAT=4V) ........................................................................................................ 55
6.9 Electro-Static Discharge ......................................................................................................................... 56
6.10 Radio Characteristics .............................................................................................................................. 56
6.11 Module RF Receive Sensitivity .............................................................................................................. 57
6.12 Module Operating Frequencies............................................................................................................... 57
7. Manufacturing ............................................................................................................................................. 59
7.1. Top and Bottom View of SIM800 .......................................................................................................... 59
7.2. Typical Solder Reflow Profile ................................................................................................................ 59
7.3. The Moisture Sensitivity Level .............................................................................................................. 60
7.4. Baking Requirements ............................................................................................................................. 60
8. Packaging ..................................................................................................................................................... 61
9. Appendix ...................................................................................................................................................... 63
I. Related Documents ................................................................................................................................. 63
II. Terms and Abbreviations ........................................................................................................................ 64
III. Safety Caution ........................................................................................................................................ 66
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