Wireless RF Modules and dongles for IoT | Coral RF

The N538BS is an industrial-grade, high-performance wireless module engineered for applications demanding exceptional range and link reliability. It integrates the powerful Texas Instruments CC1312R wireless microcontroller with a high-efficiency Power Amplifier (PA) and Low-Noise Amplifier (LNA), achieving a remarkable +35 dBm (3.2W) output power. Supporting key global Sub-1GHz ISM bands from 410 MHz to 915 MHz, it delivers robust communication over distances up to 10 kilometers, while maintaining the ultra-low power consumption characteristics of the CC1312R platform. Its 4-layer PCB design ensures optimal RF performance and stability for mission-critical IoT deployments.

Key Features & Benefits

Exceptional High Power Output: +35 dBm maximum transmit power provides superior range and penetration through obstacles, ideal for challenging environments.
Outstanding Receiver Sensitivity: -112 dBm sensitivity (at 50 kbps) ensures a stable and reliable radio link, even at low data rates.
Multi-Band Global Flexibility: Supports major ISM bands including 433 MHz, 868 MHz, 915 MHz, and specialized bands like 169 MHz (for EU utilities) and 770 MHz (China), enabling worldwide deployment.
Optimized for Battery Life: Leverages the CC1312R's advanced power management, allowing for years of operation in battery-powered, duty-cycled applications.
Robust & Reliable Design: 4-layer PCB with professional impedance control and integrated LNA enhances overall link budget and anti-interference capability.
Complete Development Platform: All CC1312R pins (GPIO, SPI, UART) are accessible for full secondary development, sensor integration, and custom firmware.
High Integration: Combines MCU, RF core, PA, and LNA in a compact 36 x 24 mm SMD package, simplifying system design.

Target Applications

Advanced Metering Infrastructure (AMI): Long-range smart water, gas, and electricity meters.
Industrial IoT & Automation: Remote process monitoring, wireless sensor networks (WSNs), and equipment telemetry.
Smart City & Utility Networks: Street lighting control, environmental monitoring, and distributed sensor grids.
Agricultural & Environmental Sensing: Large-scale farm monitoring, weather stations, and remote data acquisition.
Long-Distance Telemetry & Control: Remote control systems and scientific data backhaul.

Technical Specifications Summary

Category	Parameter	Specification
RF Core	MCU / Radio	Texas Instruments CC1312R
	PA / LNA	Integrated High-Power Front-End
RF Performance	Frequency Range	410 - 960 MHz (Model Specific: 433, 868, 915 MHz)
	Max. Output Power	+35 dBm
	Receiver Sensitivity	-112 dBm @ 50 kbps (868 MHz)
	Max. Data Rate	Up to 4000 kbps
	Typical Range	10 000 m (Line-of-sight, ideal conditions)
Electrical	Supply Voltage (MCU VCC)	3.0V - 3.6V (Typ. 3.3V)
	Supply Voltage (PA VCCPA)	4.5V - 5.5V (Required for high-power TX)
	TX Current	~1300 mA (Typ. @ +35 dBm)
	RX Current	12 mA
	Sleep Current	< 10 µA (CC1312R low-power modes)
Physical & Interface	Dimensions	36.0 x 24.0 x 3.0 mm
	Antenna Interface	IPEX Connector & RF Pad
	Host Interfaces	SPI, UART, Programmable GPIOs
	Package	Surface Mount (SMD)
	Operating Temperature	-30°C to +70°C

N538BS Module Pinout Description

Pin No.	Pin Name	Type	Description
1	GND	Power	Power Ground.
2	GND	Power	Power Ground.
3	VCCPA	Power	PA Power Supply (High Current). Range: 4.5V - 5.5V.
4	VCCPA	Power	PA Power Supply (High Current). Range: 4.5V - 5.5V.
5	GND	Power	Power Ground.
6	DIO2	Digital I/O	Programmable GPIO of the CC1312R MCU.
7	DIO3	Digital I/O	Programmable GPIO of the CC1312R MCU.
8	DIO5	Digital I/O	Programmable GPIO of the CC1312R MCU.
9	DIO6	Digital I/O	Programmable GPIO of the CC1312R MCU.
10	DIO7	Digital I/O	Programmable GPIO of the CC1312R MCU.
11	DIO8	Digital I/O	Programmable GPIO of the CC1312R MCU.
12	VCC	Power	MCU Core Supply. Range: 3.0V - 3.6V (Typ. 3.3V).
13	GND	Power	Power Ground.
14	RESET	Digital Input	Module Hardware Reset (Active Low).
15	TMS	Digital I/O	JTAG Test Mode Select for debugging/programming.
16	TCK	Digital Input	JTAG Test Clock for debugging/programming.
17	DIO18	Digital I/O	Programmable GPIO of the CC1312R MCU.
18	DIO19	Digital I/O	Programmable GPIO of the CC1312R MCU.
19	DIO20	Digital I/O	Programmable GPIO of the CC1312R MCU.
20	DIO21	Digital I/O	Programmable GPIO of the CC1312R MCU.
21	DIO22	Digital I/O	Programmable GPIO of the CC1312R MCU.
22	DIO23	ADC/Digital I/O	Programmable GPIO of the CC1312R MCU.
23	DIO24	ADC/Digital I/O	Programmable GPIO of the CC1312R MCU.
24	DIO25	ADC/Digital I/O	Programmable GPIO of the CC1312R MCU.
25	RF	RF I/O	50Ω Antenna Port. Connect to antenna via IPEX or microstrip.
26	GND	Power	Power Ground.

Ordering Information

Ordering Code	Core IC	Target Frequency Band	Output Power
N538BS-CC1312R-433M	CC1312R + PA/LNA	410 - 510 MHz	+35 dBm
N538BS-CC1312R-868M	CC1312R + PA/LNA	860 - 880 MHz	+35 dBm
N538BS-CC1312R-915M	CC1312R + PA/LNA	902 - 928 MHz	+35 dBm

Contact us for custom frequency configurations, antenna options, or regulatory pre-certification support.

Why Choose the N538BS Module?

Solve Extreme Range Challenges: Bridge vast distances without the need for complex repeater networks.
Reliability is Built-In: High power, excellent sensitivity, and robust PCB design ensure a stable link in industrial settings.
Accelerate Time-to-Market: The fully integrated, certified RF design allows you to focus on your application.
Future-Proof Platform: The powerful CC1312R MCU offers ample resources for running your application logic and advanced wireless stacks.

4. Product Line Positioning: Find Your Fit

The N624PA is designed for a fundamentally different development path compared to our full-stack modules.

Feature Model	N621PA Module	N538BS Module	N624PA Module	N538BS Module
Core MCU	CC1312R	CC1312R	CC1314R10	CC1314R10
On-Chip Flash	352KB	352KB	1 MB	1 MB
Core Value	Balanced Custom Stack	High-Performance Custom Stack	Pre-Integrated Standard Protocols	Pre-Integrated Standard Protocols
Development Focus	Develop complex, feature-rich proprietary stacks.	Develop highly optimized, proprietary stacks.	Develop your application only, using pre-built, certified stacks.	Develop your application only, using pre-built, certified stacks.
Ideal For	Custom apps needing more code space and features.	Performance-critical networks needing maximum RF control.	Smart Utilities (AMI), Smart Cities, projects needing Wi-SUN/WM-Bus, or minimizing dev time & risk.	Smart Utilities (AMI), Smart Cities, projects needing Wi-SUN/WM-Bus, or minimizing dev time & risk.
Next Step	Learn More →	Learn More →	Learn More‍→‍‍‍	Learn More‍ ‍→‍

Simple Selection Guide:

Choose the N536 Series (N538BS/N538ES) if you are building a unique, proprietary protocol and have the resources for full-stack development.
Choose the N538BS if your project requires standard protocols (like Wi-SUN or Wireless M-Bus) or your primary goal is to minimize development time, cost, and risk.

5. Start Your Project

📥 Download N538BS datasheet – Overview, key specs, and ordering guide.
📥 Request N538BS User Guide – (Available under NDA) Includes full datasheet, reference schematics, PCB layout, and BOM.
🛠 Schedule a Technical Consultation – Discuss your application and protocol requirements with our solutions architects.
📦 Request Samples & Quote – Begin your evaluation and design-in process

6. Discover the Long-Range Module

[🚀 Discover the 1W Basic Module] [🚀 Unlock the 3.2W High-Performance Module]