Quectel L76

GNSS Module Series
L76&L76-L_Hardware_Design 7 / 59
4.1. I/O Pins .................................................................................................................................... 31
4.1.1. Communication Interfaces ............................................................................................. 31
4.1.2. ANTON ........................................................................................................................... 33
4.1.3. 1PPS .............................................................................................................................. 33
4.1.4. System Pin ..................................................................................................................... 34
5 Design ................................................................................................................................................. 36
5.1. Recommended Footprint ......................................................................................................... 36
5.2. Antenna Design ....................................................................................................................... 37
5.2.1. Antenna Specification .................................................................................................... 37
5.2.2. Antenna Selection Guide ............................................................................................... 37
5.2.3. Active Antenna Reference Design ................................................................................. 38
5.2.4. Passive Antenna Reference Design .............................................................................. 40
5.3. Coexistence with Cellular Systems ......................................................................................... 41
5.3.1. In-Band Interference ...................................................................................................... 42
5.3.2. Out-of-Band Interference ............................................................................................... 43
5.3.3. Ensuring Interference Immunity ..................................................................................... 43
6 Electrical Specification ...................................................................................................................... 45
6.1. Absolute Maximum Ratings .................................................................................................... 45
6.2. Recommended Operating Conditions ..................................................................................... 46
6.3. ESD Protection ........................................................................................................................ 47
7 Mechanical Dimensions .................................................................................................................... 48
7.1. Top, Side and Bottom View Dimensions ................................................................................ 48
7.2. Top and Bottom Views ............................................................................................................ 49
8 Product Handling ............................................................................................................................... 50
8.1. Packaging ................................................................................................................................ 50
8.1.1. Tapes ............................................................................................................................. 50
8.1.2. Reels .............................................................................................................................. 51
8.2. Storage .................................................................................................................................... 51
8.3. Manufacturing and Soldering .................................................................................................. 52
9 Labelling Information ........................................................................................................................ 55
10 Appendix References ........................................................................................................................ 56