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SX1278
137 MHz to 525 MHz Low Power Long Range Transceiver, spreading factor from 6 to 12, LoRA, QFN-28
Schematic Symbol
Pin Configuration (29 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | RFI_LF | input |
| 2 | VR_ANA | power_in |
| 3 | VBAT_ANA | power_in |
| 4 | VR_DIG | power_in |
| 5 | XTA | bidirectional |
| 6 | XTB | bidirectional |
| 7 | ~{RESET} | input |
| 8 | DIO0 | bidirectional |
| 9 | DIO1 | bidirectional |
| 10 | DIO2 | bidirectional |
| 11 | DIO3 | bidirectional |
| 12 | DIO4 | bidirectional |
| 13 | DIO5 | bidirectional |
| 14 | VBAT_DIG | power_in |
| 15 | GND | power_in |
| 16 | SCK | input |
| 17 | MISO | output |
| 18 | MOSI | input |
| 19 | NSS | input |
| 20 | RXTX/RF_MOD | output |
| 21 | GND | passive |
| 22 | GND | passive |
| 23 | GND | passive |
| 24 | VBAT_RF | power_in |
| 25 | VR_PA | power_out |
| 26 | GND | passive |
| 27 | PA_BOOST | power_out |
| 28 | RFO_LF | output |
| 29 | GND | passive |
Footprint
ConfirmedPackage_DFN_QFN/QFN-28-1EP_6x6mm_P0.65mm_EP4.8x4.8mm
Pad Layout
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Pads (38)
| Number | Type |
|---|---|
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| — | smd |
| 1 | smd |
| 2 | smd |
| 3 | smd |
| 4 | smd |
| 5 | smd |
| 6 | smd |
| 7 | smd |
| 8 | smd |
| 9 | smd |
| 10 | smd |
| 11 | smd |
| 12 | smd |
| 13 | smd |
| 14 | smd |
| 15 | smd |
| 16 | smd |
| 17 | smd |
| 18 | smd |
| 19 | smd |
| 20 | smd |
| 21 | smd |
| 22 | smd |
| 23 | smd |
| 24 | smd |
| 25 | smd |
| 26 | smd |
| 27 | smd |
| 28 | smd |
| 29 | smd |