SIM Tech SIMCom SIM900-DS Hardware Design page 5

Table of Contents

Smart Machine Smart Decision

Table Index

Table 1: SIM900-DS key features ...................................................................................................................... 8

Table 2: Coding schemes and maximum net data rates over air interface ........................................................ 10

Table 3: Overview of operating modes............................................................................................................. 10

Table 4: Pin description .................................................................................................................................... 13

Table 5: The Current consumption of Minimum Functionality Mode ............................................................. 22

Table 6: Microphone Input Characteristics....................................................................................................... 28

Table 7: Audio Output Characteristics ............................................................................................................. 28

Table 8: Pin description (Amphenol SIM card holder)..................................................................................... 30

Table 9: Pin description (Molex SIM card holder) ........................................................................................... 31

Table 10: ADC specification ............................................................................................................................ 32

Table 11: RI Behaviors ..................................................................................................................................... 32

Table 12: Status of the NETLIGHT pin ........................................................................................................... 34

Table 13: Pin definition of the GPIO interface ................................................................................................. 34

Table 14: Absolute maximum ratings............................................................................................................... 37

Table 15: Recommended operating conditions................................................................................................. 37

Table 16: Digital interface characteristics ........................................................................................................ 37

Table 17: SIM card interface characteristics..................................................................................................... 38

Table 18: VDD_EXT characteristics ................................................................................................................ 38

Table 19: SIM1_VDD and SIM2_VDD characteristics ................................................................................... 38

Table 20: VRTC characteristics........................................................................................................................ 38

Table 21: Current consumption* ...................................................................................................................... 39

Table 22: The ESD characteristics (Temperature: 25℃, Humidity: 45 %) ...................................................... 40

Table 23: SIM900-DS GSM850 and EGSM900 conducted RF output power ................................................. 40

Table 24: SIM900-DS DCS1800 and PCS1900 conducted RF output power.................................................. 41

Table 25: SIM900-DS conducted RF receive sensitivity.................................................................................. 42

Table 26: SIM900-DS operating frequencies ................................................................................................... 42

Table 27: Illustration of module information.................................................................................................... 44

Table 28: Related documents............................................................................................................................ 45

Table 29: Terms and Abbreviations.................................................................................................................. 46

Table 30: Safety caution ................................................................................................................................... 47

SIM900-DS_Hardware Design_V1.00

2013-01-20

Table of Contents