Quectel BC95 Hardware Design page 7

NB-IoT Module Series
BC95 Hardware Design
Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ................................................................................................................ 11
FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 14
FIGURE 3: REFERENCE CIRCUIT FOR THE VBAT INPUT ........................................................................... 19
FIGURE 4: TURN-ON TIMING .......................................................................................................................... 20
FIGURE 5: TURN-OFF TIMING ........................................................................................................................ 20
FIGURE 6: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT ............................................. 21
FIGURE 7: REFERENCE CIRCUIT OF RESET BY USING BUTTON ............................................................. 21
FIGURE 8: DIAGRAM FOR POWER CONSUMPTION .................................................................................... 22
FIGURE 9: REFERENCE DESIGN FOR MAIN PORT ..................................................................................... 24
FIGURE 10: REFERENCE DESIGN FOR DEBUG PORT ............................................................................... 24
FIGURE 11: LEVEL MATCH DESIGN FOR 3.3V SYSTEM .............................................................................. 25
FIGURE 12: SKETCH MAP FOR RS-232 INTERFACE MATCH ...................................................................... 26
FIGURE 13: REFERENCE CIRCUIT FOR USIM INTERFACE WITH 6-PIN USIM CARD CONNECTOR ...... 27
FIGURE 14: BEHAVIORS OF RI WHEN A URC OR SMS IS RECEIVED ....................................................... 29
FIGURE 15: REFERENCE DESIGN FOR NETLIGHT ..................................................................................... 30
FIGURE 16: REFERENCE DESIGN FOR RF .................................................................................................. 31
FIGURE 17: MICROSTRIP LINE DESIGN ON A 2-LAYER PCB ...................................................................... 32
FIGURE 18: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB .................................................. 32
FIGURE 19: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3 AS REFERENCE
GROUND) .......................................................................................................................................................... 33
FIGURE 20: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4 AS REFERENCE
GROUND) .......................................................................................................................................................... 33
FIGURE 21: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 36
FIGURE 22: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 36
FIGURE 23: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 37
FIGURE 24: MODULE TOP AND SIDE DIMENSIONS ..................................................................................... 41
FIGURE 25: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................. 42
FIGURE 26: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 43
FIGURE 27: TOP VIEW OF THE MODULE ...................................................................................................... 44
FIGURE 28: BOTTOM VIEW OF THE MODULE .............................................................................................. 44
FIGURE 29: REFLOW SOLDERING THERMAL PROFILE .............................................................................. 46
FIGURE 30: TAPE DIMENSIONS ..................................................................................................................... 47
FIGURE 31: REEL DIMENSIONS ..................................................................................................................... 48
BC95_Hardware_Design Confidential / Released 6 / 51