N455AS LR2021 1.2W LoRa Transceiver – 868MHz, 915MHz & 2.4GHz for High‑Performance Gateways
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N455AS Dual‑Band LoRa Transceiver Module
Based on Semtech LR2021 – 1.2W High‑Power for Sub‑GHz & 2.4GHz LoRaWAN Gateways
📌 Product Overview
The N455AS is a high‑performance, dual‑band LoRa transceiver module designed for license‑free long‑range communication. It integrates Semtech’s LR2021 chipset with built‑in Power Amplifier (PA) and Low‑Noise Amplifier (LNA), offering +31 dBm (1.2 Watt) output power on both Sub‑GHz (868/915 MHz) and 2.4 GHz bands.
With excellent sensitivity and flexible frequency support, this module is ideal for professional LoRaWAN gateways, private networks, and applications that require seamless operation across both sub‑gigahertz and 2.4 GHz ISM bands.
📊 Detailed Technical Specifications
| Category | Parameter | Specification |
|---|---|---|
| RF PERFORMANCE | Frequency Bands | Sub‑GHz: 860 – 930 MHz (868/915 MHz) 2.4 GHz: 2400 – 2483.5 MHz |
| Max Output Power | +31 dBm (1200 mW) | |
| Receiver Sensitivity | Sub‑GHz: –148 dBm 2.4 GHz: –135 dBm (typ.) | |
| LoRa Data Rate | Sub‑GHz: 0 – 2600 kbps 2.4 GHz: up to 2600 kbps (with FSK/MSK) | |
| Modulation | LoRa®, (G)FSK, MSK, BPSK | |
| Frequency Stability | ±2 kHz (Sub‑GHz), ±10 ppm (2.4 GHz) | |
| HARDWARE | Module Dimensions | 36.0 × 24.0 × 3.0 mm |
| Antenna Interface | 50Ω IPEX Connector + RF pin (shared or separate – specify) | |
| Host Interface | SPI, GPIOs | |
| Package | SMD | |
| ELECTRICAL | Digital/Analog Supply (VCC) | 3.3V (Typical) |
| PA Supply (VCC_PA) | 4.5V – 5.5V (5.0V Typ.) | |
| Tx Current (Peak) | 650 mA (@ +30 dBm) | |
| Rx Current | 18 mA (Sub‑GHz) / 25 mA (2.4 GHz) | |
| Standby Current | 15 µA | |
| Operating Temperature | –40°C to +85°C |
🎯 Applications
Dual‑Band LoRaWAN Gateways & Concentrators
Multi‑protocol IoT bridges (Sub‑GHz + 2.4 GHz)
Industrial telemetry and remote monitoring
Smart city infrastructure (street lighting, parking)
Asset tracking and logistics
Emergency response networks
🛠 Development Support
| Area | Details |
|---|---|
| Software Compatibility | Semtech official drivers + open‑source implementations (e.g., LoRaMac‑node, mbed) |
| LoRaWAN Stack Integration | Supports LoRaMAC‑node, ChirpStack, and other stacks with dual‑band adaptation |
| Development Tools | Standard SPI interface – easy connection to any host MCU |
| Documentation | Comprehensive datasheets, application notes, reference designs, and dual‑band tuning guides |
📦 Ordering Information
| Order Code | Core IC | Frequency Bands | Output Power |
|---|---|---|---|
| N455AS-868M-2.4G | LR2021 + PA + LNA | 860 – 880 MHz (Sub‑GHz) & 2400 – 2483.5 MHz (2.4 GHz) | +31 dBm at 868Mhz +31 dBm at 2.4G |
| N455AS-915M-2.4G | LR2021 + PA + LNA | 910 – 930 MHz (Sub‑GHz) & 2400 – 2483.5 MHz (2.4 GHz) | +31 dBm at 915Mhz +31 dBm at 2.4G |
| N455AS-433M-2.4G | LR2021 + PA + LNA | 410 – 510 MHz (Sub‑GHz) & 2400 – 2483.5 MHz (2.4 GHz) | +31 dBm at 868Mhz +31 dBm at 2.4G |
⚙️ Custom frequency variants (e.g., 490 MHz, 868 MHz single‑band, or other ISM bands) and volume pricing available upon request.
📌 Notes
The dual‑band version (N456AS‑DUAL) includes two independent RF paths and requires separate antenna connections (IPEX for each band).
For 2.4 GHz operation, the module supports LoRa modulation (FLRC) and (G)FSK, enabling higher data rates for short‑range, high‑throughput links.