LLCC68 datasheet(8/111 Pages) SEMTECH

8 / 111 page

LLCC68

Data Sheet

Rev. 1.1

DS.LLCC68.W.APP

Dec 2024

8 of 111

Semtech

LLCC68

www.semtech.com

List of Tables

Table 2-1: LLCC68 Pinout In QFN 4x4 24L................................................................................ 12

Table 3-1: ESD and Latch-up Notice ........................................................................................ 14

Table 3-2: Absolute Maximum Ratings ................................................................................... 14

Table 3-3: Operating Range..................................................................................................... 14

Table 3-4: Crystal Specifications.............................................................................................. 15

Table 3-5: Power Consumption............................................................................................... 16

Table 3-6: Power Consumption in Transmit Mode ................................................................. 17

Table 3-7: General Specifications............................................................................................ 18

Table 3-8: Receive Mode Specifications.................................................................................. 19

Table 3-9: Transmit Mode Specifications................................................................................ 21

Table 3-10: Digital I/O Specifications ...................................................................................... 21

Table 4-1: Internal Foot Capacitor Configuration.................................................................... 23

Table 4-2: Intermediate Frequencies in FSK Mode ................................................................. 25

Table 4-3: Intermediate Frequencies in LoRa Mode ............................................................... 26

Table 4-4: Power Amplifier Summary ..................................................................................... 30

Table 5-1: Regulation Type versus Circuit Mode..................................................................... 31

Table 5-2: OCP Configuration.................................................................................................. 31

Table 5-3: Recommended 15µH Inductors.............................................................................. 33

Table 6-1: Range of Spreading Factors (SF)............................................................................. 35

Table 6-2: Signal Bandwidth Setting in LoRa® Mode............................................................... 35

Table 6-3: Coding Rate Overhead............................................................................................ 36

Table 6-4: Registers and Values............................................................................................... 38

Table 6-5: Bandwidth Definition in FSK Packet Type............................................................... 39

Table 6-6: Whitening Initial Value........................................................................................... 43

Table 6-7: CRC Type Configuration.......................................................................................... 44

Table 6-8: CRC Initial Value ..................................................................................................... 44

Table 6-9: CRC Polynomial....................................................................................................... 44

Table 8-1: SPI Timing Requirements........................................................................................ 49

Table 8-2: Switching Time ....................................................................................................... 51

Table 8-3: Digital Pads Configuration for each Chip Mode ..................................................... 52

Table 8-4: IRQ Status Registers ............................................................................................... 53

Table 9-1: LLCC68 Operating Modes ....................................................................................... 55

Table 9-2: Image Calibration Over the ISM Bands................................................................... 56

Table 9-3: Rx Gain Configuration............................................................................................. 57

Table 10-1: SPI Interface Command Sequence ....................................................................... 60

Table 11-1: Commands Selecting the Operating Modes of the Radio .................................... 61

Table 11-2: Commands to Access the Radio Registers and FIFO Buffer.................................. 62

Table 11-3: Commands Controlling the Radio IRQs and DIOs................................................. 62

Table 11-4: Commands Controlling the RF and Packets Settings............................................ 62

Table 11-5: Commands Returning the Radio Status................................................................ 63

Table 12-1: List of Registers .................................................................................................... 64

Table 13-1: SetSleep SPI Transaction ...................................................................................... 66

Table 13-2: Sleep Mode Definition.......................................................................................... 66

Table 13-3: SetConfig SPI Transaction..................................................................................... 67

Table 13-4: STDBY Mode Configuration .................................................................................. 67

Table 13-5: SetFs SPI Transaction............................................................................................ 67

Table 13-6: SetTx SPI Transaction ........................................................................................... 68

Table 13-7: SetTx Timeout Duration ....................................................................................... 68

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