SIM800L datasheet(9/73 Pages) SIMCOM

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Smart Machine Smart Decision

SIM800H&SIM800L_Hardware Design_V2.02

2015-07-27

FIGURE 47: LED DRIVER REFERENCE CIRCUIT..................................................................................................... 51

FIGURE 48: RF_SYNC SIGNAL DURING TRANSMIT BURST ................................................................................ 51

FIGURE 49: GSM ANTENNA MATCHING CIRCUIT ................................................................................................. 52

FIGURE 50: GSM SIMPLE ANTENNA MATCHING CIRCUIT .................................................................................. 53

FIGURE 51: BLUETOOTH ANTENNA MATCHING CIRCUIT .................................................................................. 53

FIGURE 52: FM ANTENNA MATCHING CIRCUIT .................................................................................................... 54

FIGURE 53: GND PIN OF THE EARPHONE USE TO BE THE FM ANTENNA INTERFACE ................................. 54

FIGURE 54: PIN ASSIGNMENT.................................................................................................................................... 55

FIGURE 55: RECOMMENDED PCB LAYOUT ............................................................................................................ 57

FIGURE 56: TOP AND BOTTOM VIEW OF SIM800H ................................................................................................ 65

FIGURE 57: TOP AND BOTTOM VIEW OF SIM800L................................................................................................. 65

FIGURE 58: TYPICAL SOLDER REFLOW PROFILE OF LEAD-FREE PROCESSES.............................................. 66

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