Part: SX1261/2 — Semtech Type: Sub-GHz RF Transceiver

Description: Long-range, low-power sub-GHz radio transceivers supporting LoRa®, Long Range FHSS, and (G)FSK modulations, designed for extended battery life with 4.2 mA active receive current and continuous frequency coverage from 150 MHz to 960 MHz.

Operating Conditions:

• Supply voltage: 1.8 to 3.7 V
• Operating temperature: -40 to +85 °C
• Frequency range: 150 to 960 MHz

Absolute Maximum Ratings:

• Max supply voltage: 3.9 V
• Max junction/storage temperature: -55 to +150 °C

Key Specs:

• Active receive current: 4.2 mA
• SX1261 transmit power: up to +15 dBm
• SX1262 transmit power: up to +22 dBm
• Frequency coverage: 150 MHz to 960 MHz
• Sleep mode current: 0.6 μA (Warm Start, 3.3 V)
• Standby mode current: 1.6 mA (RC13M, 3.3 V)
• SPI interface clock frequency: up to 16 MHz

Features:

• Supports LoRa®, Long Range FHSS, and (G)FSK modulations
• Designed for long battery life
• Highly configurable for various application requirements
• Complies with LoRaWAN® physical layer requirements
• Suitable for systems targeting ETSI EN 300 220, FCC CFR 47 Part 15, China, and Japanese ARIB T-108 regulations
• Integrated power amplifiers
• SPI interface for control

Applications:

• Smart meters
• Supply chain and logistics
• Building automation
• Agricultural sensors
• Smart cities
• Retail store sensors
• Asset tracking
• Street lights
• Parking sensors
• Environmental sensors
• Healthcare
• Safety and security sensors
• Remote control applications

Package:

• QFN 24 Package

The level of integration and the low consumption within SX1261/2 enable a new generation of Internet of Things applications.

• Smart meters
• Supply chain and logistics
• Building automation
• Agricultural sensors
• Smart cities
• Retail store sensors
• Asset tracking
• Street lights
• Parking sensors
• Environmental sensors
• Healthcare
• Safety and security sensors
• Remote control applications

SX1262IMLTRT Pinout

Package: 24-VFQFN (QFN 4×4, 24-pin with Exposed Pad)

Notes

• SX1262 vs. SX1261: This pinout is for the SX1262IMLTRT specifically. The SX1262 can transmit up to +22 dBm; the SX1261 variant transmits up to +15 dBm. Pin assignments are identical between the two variants.
• VR_PA: Maximum voltage is 3.1 V for SX1262 (vs. 1.35 V for SX1261). Ensure correct regulator configuration.
• DIO Pins: DIO1, DIO2, and DIO3 are multi-function pins configurable for IRQ, RF switch control, or TCXO control via command interface.
• VBAT_IO: Separate supply for DIO pins; can be tied to VBAT or VDD_IN depending on application requirements.
• Exposed Pad (Pin 0): Must be soldered to ground for proper thermal and electrical performance.
• Crystal: XTA/XTB pins require a 32 MHz crystal oscillator with appropriate load capacitance (see datasheet Section 4.1.3).

The electrical specifications are given with the following conditions unless otherwise specified:

• VBAT_IO = VBAT = 3.3 V, all current consumptions are given for VBAT connected to VBAT_IO
• Temperature = 25 °C
• FXOSC = 32 MHz, with specified crystal
• FRF = 434/490/868/915 MHz
• All RF impedances matched
• Transmit mode output power defined into a 50 load impedance
• FSK BER = 0.1%, 2-level FSK modulation without pre-filtering, BR = 4.8 kb/s, FDA = ± 5 kHz, BW_F = 20 kHz double-sided
• LoRa® PER = 1%, packet 64 bytes, preamble 8 symbols, CR = 4/5, CRC on payload enabled, explicit header mode
• RX/TX specifications given using default RX gain step and direct tie connection between Rx and Tx
• Blocking immunity, ACR and co-channel rejection are given for a single tone (CW) interferer and referenced to sensitivity +3 dB
• Optional TCXO and RF Switch power consumption always excluded

Throughout this document, all receiver bandwidths are expressed as 'double-sideband'. This is valid for LoRa® and FSK modulations.

Stresses above the values listed below may cause permanent device failure. Exposure to absolute maximum ratings for extended periods may affect device reliability, reducing product life time.

Table 3-2: Absolute Maximum Ratings

The transceiver is delivered in a 4x4mm QFN package with 0.5 mm pitch:

Figure 16-1: QFN 4x4 Package Outline Drawing

Figure 16-1: QFN 4x4 Package Outline Drawing