Smart Machine Smart Decision

SIM800C_Hardware_Design_V1.02

4

2015-4-27

4.8.2.

SIM Card Design Guide...................................................................................................................... 32

4.8.3.

Design Considerations for SIM Card Holder ...................................................................................... 32

4.9.

ADC ....................................................................................................................................34

4.10. Network Status Indication...................................................................................................35

4.10.1.

NETLIGHT Multiplexing Function................................................................................................. 35

4.11. Operating Status Indication.................................................................................................36

4.11.1.

STATUS Multiplexing Function ...................................................................................................... 36

4.12. RF Synchronization Signal .................................................................................................36

4.12.1.

RF_SYNC Multiplexing Function................................................................................................... 36

4.13. Antenna Interface................................................................................................................37

4.13.1

GSM Antenna Interface ................................................................................................................... 37

4.13.2

Bluetooth Antenna Interface ............................................................................................................ 38

5.

PCB Layout ........................................................................................................ 39

5.1

Pin Assignment ...................................................................................................................39

5.2

Principle of PCB Layout .....................................................................................................39

5.2.1

Antenna Interface ................................................................................................................................ 40

5.2.2

Power Supply ...................................................................................................................................... 40

5.2.3

SIM Card Interface.............................................................................................................................. 40

5.2.4

Audio Interface.................................................................................................................................... 40

5.2.5

Others .................................................................................................................................................. 40

6.

Electrical, Reliability and Radio Characteristics ........................................... 41

6.1

Absolute Maximum Ratings ...............................................................................................41

6.2

Recommended Operating Conditions .................................................................................41

6.3

Digital Interface Characteristics..........................................................................................41

6.4

SIM Card Interface Characteristics.....................................................................................41

6.5

SIM_VDD Characteristics ..................................................................................................42

6.6

VDD_EXT Characteristics .................................................................................................42

6.7

VRTC Characteristics .........................................................................................................42

6.8

Current Consumption (VBAT=4.0V) .................................................................................42

6.9

Electro-Static Discharge .....................................................................................................43

6.10

Radio Characteristics ..........................................................................................................44

6.10.1

Module RF Output Power................................................................................................................ 44

6.10.2

Module RF Receive Sensitivity ....................................................................................................... 45

6.10.3

Module Operating Frequencies........................................................................................................ 45

7.

Manufacturing ................................................................................................... 46

7.1.

Top and Bottom View of SIM800C....................................................................................46

7.2.

Typical Solder Reflow Profile ............................................................................................46

7.3.

The Moisture Sensitivity Level...........................................................................................47

7.4.

Baking Requirements..........................................................................................................47

8.

Appendix............................................................................................................. 48

I.

Related Documents .............................................................................................................48

II.

Multiplexing Function.........................................................................................................49