User's Manual

SIM7075G User Manual V1.00
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Figure Index
Figure 1: SIM7075G block diagram ......................................................................................................... 10
Figure 2: Pin assignment overview .......................................................................................................... 12
Figure 3: Dimensions (Unit: mm) ............................................................................................................. 19
Figure 4: Footprint recommendation (Unit: mm) ......................................................................................20
Figure 5: Voltage drop in EDGE or GPRS mode .....................................................................................21
Figure 6: Power supply application circuit ................................................................................................22
Figure 7: Power supply reference circuit ..................................................................................................23
Figure 8: Reference power on/off circuit .................................................................................................. 24
Figure 9: Power on timing sequence ........................................................................................................24
Figure 10: Power off timing sequence ......................................................................................................26
Figure 11: UART full modem .................................................................................................................... 27
Figure 12: UART null modem ...................................................................................................................28
Figure 13: Reference circuit with level shifter IC ..................................................................................... 28
Figure 14: Reference circuit with Transistor ............................................................................................ 29
Figure 15: RI behaviour（SMS and URC report） ..................................................................................29
Figure 16: USB reference circuit .............................................................................................................. 30
Figure 17: Reference circuit of BOOT_CFG interface .............................................................................31
Figure 18: SIM interface reference circuit ................................................................................................32
Figure 19: PCM_SYNC timing ..................................................................................................................33
Figure 20: External codec to module timing ............................................................................................ 34
Figure 21: Module to external codec timing .............................................................................................34
Figure 22: Audio codec reference circuit ..................................................................................................35
Figure 23: I2C reference circuit ................................................................................................................35
Figure 24: NETLIGHT reference circuit ....................................................................................................36
Figure 25: Power on sequence of the VDD_EXT .................................................................................... 38
Figure 26: Antenna matching circuit (MAIN_ANT) ...................................................................................43
Figure 27: Active antenna circuit .............................................................................................................. 44
Figure 28: Passive antenna circuit (Default) ............................................................................................44
Figure 29: RF trace should be far away from other high speed signal lines ...........................................46
Figure 30: The distance between GND to the inner conductor of SMA ..................................................46
Figure 31: e-DRX diagrammatic sketch ................................................................................................... 52
Figure 32: Top and bottom view of SIM7075G ........................................................................................ 58
Figure 33: Label information .....................................................................................................................59
Figure 34: The ramp-soak-spike reflow profile of SIM7075G ..................................................................60
Figure 35: stencil recommendation (Unit: mm) ........................................................................................62
Figure 36: packaging diagram ..................................................................................................................63
Figure 37: Tray drawing ............................................................................................................................63
Figure 38: Small carton drawing .............................................................................................................. 64
Figure 39: Big carton drawing .................................................................................................................. 65
Figure 40: Reference design ....................................................................................................................66