Smart Machine Smart Decision
SIM800C_Hardware_Design_V1.00 4 2014-10-30
4.8.2. SIM Card Design Guide ...................................................................................................................... 34
4.8.3. Design Considerations for SIM Card Holder ...................................................................................... 35
4.9. ADC .................................................................................................................................... 36
4.10. Network Status Indication ................................................................................................... 37
4.10.1. NETLIGHT Multiplexing Function ................................................................................................. 38
4.11. Operating Status Indication ................................................................................................. 38
4.11.1. STATUS Multiplexing Function ...................................................................................................... 38
4.12. RF Synchronization Signal ................................................................................................. 38
4.12.1. RF_SYNC Multiplexing Function ................................................................................................... 39
4.13. Antenna Interface ................................................................................................................ 39
4.13.1 GSM Antenna Interface ................................................................................................................... 39
5. PCB Layout ........................................................................................................ 41
5.1 Pin Assignment ................................................................................................................... 41
5.2 Principle of PCB Layout ..................................................................................................... 41
5.2.1 Antenna Interface ................................................................................................................................ 42
5.2.2 Power Supply ...................................................................................................................................... 42
5.2.3 SIM Card Interface .............................................................................................................................. 42
5.2.4 Audio Interface .................................................................................................................................... 42
5.2.5 Others .................................................................................................................................................. 42
6. Electrical, Reliability and Radio Characteristics ........................................... 43
6.1 Absolute Maximum Ratings ............................................................................................... 43
6.2 Recommended Operating Conditions ................................................................................. 43
6.3 Digital Interface Characteristics .......................................................................................... 43
6.4 SIM Card Interface Characteristics ..................................................................................... 43
6.5 SIM_VDD Characteristics .................................................................................................. 44
6.6 VDD_EXT Characteristics.................................................................................................. 44
6.7 VRTC Characteristics ......................................................................................................... 44
6.8 Current Consumption (VBAT=4.0V) ................................................................................. 44
6.9 Electro-Static Discharge...................................................................................................... 45
6.10 Radio Characteristics .......................................................................................................... 46
6.10.1 Module RF Output Power ................................................................................................................ 46
6.10.2 Module RF Receive Sensitivity ....................................................................................................... 47
6.10.3 Module Operating Frequencies ........................................................................................................ 47
7. Manufacturing ................................................................................................... 48
7.1. Top and Bottom View of SIM800C .................................................................................... 48
7.2. Typical Solder Reflow Profile ............................................................................................ 48
7.3. The Moisture Sensitivity Level ........................................................................................... 49
7.4. Baking Requirements .......................................................................................................... 49
8. Appendix ............................................................................................................. 50
I. Related Documents ............................................................................................................. 50
II. Multiplexing Function......................................................................................................... 51
III. Terms and Abbreviations .................................................................................................... 51
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