Wireless RF Modules and dongles for IoT | Coral RF

N540AS is a high-performance, low cost Sub-1GHz RF transceiver module designed for robust, medium-to-long-range wireless communication. Based on Silicon Labs Si4463 chip, operates global ISM bands (169 MHz, 433 MHz, 868 MHz, and 915 MHz), up to +20 dBm output power and receiver sensitivity down to -126 dBm. With its ultra-compact 16 x 12 mm size, comprehensive SPI interface, support Arduino and embedded platforms. N540AS provides developers with a powerful, flexible, and easy-to-integrate wireless solution for IoT and industrial applications.

Key Features & Benefits

Multi-Band: Supports Sub-1GHz frequency bands.
RF Performance: +20 dBm transmit power, distances up to 2000 meters in open terrain.
Ultra-Low Power: Sleep current of 0.1 µA.
Extremely Compact Form Factor: Smallest Si4463 modules (16 x 12 x 3 mm).
Developer-Friendly Ecosystem: Full pin breakout, software support Arduino libraries, sample code and development.

Technical Specifications

Category	Parameter	Specification
RF & Performance	Frequency Range	169, 433, 868, 915 MHz (Programmable 119-1050 MHz)
	Max. Output Power	+20 dBm
	Receiver Sensitivity	-126 dBm (typical, depends on data rate)
	Data Rate	0.3 – 500 kbps
	Modulation	(G)FSK, OOK
	Typical Range	1500 – 2000 m (Line-of-Sight)
Electrical	Supply Voltage	1.8 – 3.9 V (Typical 3.3V)
	TX Current (@ +20 dBm)	120 mA (typical)
	RX Current	18 mA (typical)
	Sleep Current	0.1 µA (typical)
Physical & Interface	Dimensions	16.0 x 12.0 x 3.0 mm
	Host Interface	SPI
	Antenna Interface	50Ω RF Pad
	Package	SMD
Environmental	Operating Temperature	-40°C to +85°C

Development & Software Support

Easy Hardware : Connect via SPI to any host microcontroller (e.g., Arduino, STM32, ESP32).
Software Support:
- Arduino Library: Open-source library.
- Sample Code: Basic send/receive functions.
- Silicon Labs SDK: For advanced development using the full feature set of the Si4463.

Applications

N540AS suited for a broad spectrum of applications requiring reliable, low-to-medium data rate wireless links:

Smart Metering & AMI: Wireless Meter-Bus (MBus), automatic meter reading.
Home & Building Automation: Smart lighting, security systems, HVAC control.
Industrial IoT & Telemetry: Wireless sensor networks (WSN), equipment monitoring, SCADA systems.
Environmental & Agricultural Sensing: Weather stations, soil moisture sensors, irrigation control.
Consumer Electronics & DIY: Remote controls, Arduino/Raspberry Pi projects.

Ordering Information

Select the standard model for your target frequency region, or contact us for custom variants.

Model	Core IC	Frequency Band	Output Power
N540AS-169M	Si4463	160–175 MHz	+20 dBm
N540AS-433M	Si4463	410–480 MHz	+20 dBm
N540AS-868M	Si4463	860–960 MHz	+20 dBm

Why Choose the N540AS Module?

N540AS strikes an optimal balance between high RF performance, ultra-low power consumption, low cost, and an extremely compact size. Design into a ready-to-use module. Request Sample‍.

Technical documentation, application notes, or technical support, please contact our sales team.

Choosing the Right Solution for Your Project

Comparison	N540AS Module	N541AS Module	N542AS Module
Core IC	si4463	si4463 + pa	si4463 + pa
Output Power	+20 dBm	+27 dBm (0.5W)	+33 dBm (2W)
Protocol	(G)FSK	(G)FSK	(G)FSK
Key Value	Cost-optimized	Maximum range	Maximum range, penetration & link robustness
Ideal For	Short-medium range telemetry, industrial control	Extreme-range telemetry & control in harsh conditions	Extreme-range telemetry & control in harsh conditions
Next Step	[⤓ Download Full Datasheet]	`[‍View N541AS Details‍]‍`	`[‍View N542AS Details‍]`

How to Decide:

Choose the N542AS: demands maximum range and signal using (G)FSK/OOK/ASK protocols (e.g., remote SCADA, backhaul links).
Consider the N540AS: need a reliable, cost-effective (G)FSK solution for shorter distances.

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