The N511BS-B is a high-performance, compact narrowband RF module built around Texas Instruments' CC1125 transceiver. Engineered for reliability and ease of integration, it features a high-stability 40 MHz TCXO (Temperature Compensated Crystal Oscillator) and comprehensive ESD protection on every pin, including the RF interface. This module delivers +15 dBm output power and excellent -121 dBm receiver sensitivity at 1.2 kbps, enabling robust communication over distances up to 2000 meters. Its fully integrated design eliminates the need for external SAW or IF filters, while the 4-layer PCB ensures optimal RF performance. With support for major Sub-1GHz ISM bands and direct compatibility with Sigfox networks and Arduino platforms, the N511BS-B is an ideal solution for demanding IoT, industrial monitoring, and wireless meter reading applications.

[📊 Download Full Datasheet Now] | [🔧 View Hardware Design Guide]

2. Key Features & Benefits

Feature	Benefit
Reliable RF Performance	+15 dBm TX power and -121 dBm RX sensitivity, combined with a 40 MHz TCXO, ensure stable, long-range communication for narrowband applications.
Robust ESD Protection	Every I/O pin and the RF interface feature enhanced ESD protection, significantly improving durability and reliability in real-world deployments.
Global Multi-Band Support	Operates on key narrowband frequencies: 169 MHz, 433 MHz, 868 MHz, and 915 MHz (including regional variants), facilitating worldwide product development.
Ultra-Low Power Operation	Consumes only 23 mA in RX mode and a remarkable 0.1 µA in sleep mode, making it exceptionally suitable for battery-powered, long-life devices.
Compact & Easy Integration	Extremely small 19×16×3 mm SMD package simplifies PCB design. The simple SPI interface and integrated filters allow for rapid development without deep RF expertise.
Ecosystem Compatibility	Fully compatible with Arduino development platforms and ready for integration into Sigfox LPWAN networks.

3. Detailed Technical Specifications

Get All Technical Documentation: [📘 Full Technical Specs] | [📐 3D Model Files] | [📋 Certification List]

Category	Parameter	Specification	Notes / Conditions
RF & Performance	Frequency Bands	169 MHz, 433 MHz, 868 MHz, 915 MHz	Covers 164-192, 410-480, 820-960 MHz ranges.
	Max. Output Power	+15 dBm (~32 mW)
	Receiver Sensitivity	-121 dBm	@ 1.2 kbps data rate (2-FSK).
	Modulation	2-FSK, 4-FSK, MSK, OOK
	Programmable Data Rate	0.3 – 200 kbps (Up to 600 kbps supported, inquire)	Narrowband optimized. CC1125 enables higher bandwidth options.
	Typical Range	Up to 2000 m	Line-of-sight, ideal conditions.
Hardware	Module Dimensions	19.0 × 16.0 × 3.0 mm
	Antenna Interface	RF Pad (50Ω)	Requires external matching network/antenna. [🔗 Recommended Antenna List]
	Host Interface	SPI (MOSI, MISO, SCK, NSS) + GPIOs	[💻 SPI Interface Protocol]
	Oscillator	Integrated 40 MHz TCXO	Pin 6 (VTC) for power control.
	Protection	ESD Protection on All Pins
	Package	Surface Mount Device (SMD)	4-layer PCB.
Electrical	Supply Voltage (VCC)	1.8V – 3.6V (3.3V Typical)
	Tx Current (Peak)	53 mA (Typical @ +15 dBm)
	Rx Current	23 mA (Typical)
	Sleep Current	0.1 µA (Typical)
	Operating Temperature	-40°C to +80°C	Industrial grade.

4. Target Applications

Sigfox Network End Devices: Certified for use in global Sigfox low-power wide-area networks. [📡 View Sigfox Certification Details]
Industrial Monitoring & Control (IIoT): Wireless sensor networks for equipment monitoring, environmental sensing.
Wireless Metering (AMR/AMI): Smart water, gas, and electricity meters. [🛢️ Smart Metering Solutions]
Home & Building Automation: Security systems, HVAC control, smart lighting.
Arduino & Maker Projects: Easy-to-integrate wireless connectivity for educational kits and rapid prototyping. [🤖 Get Arduino Development Library]
Asset Tracking & Logistics: Low-power tracking of vehicles, containers, or high-value assets.

5. Pin Configuration & Critical Functions

Design Note: For proper operation, especially when using TCXO sleep control, follow this power sequence: 1) Power TCXO (VTC), 2) Wait >2ms, 3) Assert Reset (RST), 4) Configure via SPI. [⚠️ Detailed Power Sequencing Guide]

Pin	Name	Type	Description
1	RF	I/O	RF Input/Output. Connect to antenna matching network. [📡 Antenna Design Guide]
6	VTC	Power	TCXO Power Control. Connect to VCC (always on) or a GPIO for sleep control.
8-10, 12	MOSI, MISO, SCK, NSS	I/O	SPI Interface for chip configuration and data exchange.
5	RST	I	Active-low Reset input.
4, 7, 11	GDIO3, GPIO2, GPIO0	I/O	General-purpose I/O pins from CC1125.
13	VCC	P	Power Supply (1.8V - 3.6V).
2, 3, 14	GND	P	Ground.

6. Why Choose the N511BS-B?

Engineered for Reliability and Efficiency

Exceptional Reliability: The combination of a TCXO for frequency stability and full-pin ESD protection makes it one of the most robust narrowband modules available.
CC1125 Platform Advantage: Compared to the previous CC1120, the CC1125 offers higher performance margin, a wider data rate range, and superior blocking performance, future-proofing your design.
Power Efficiency Leader: An ultra-low 0.1 µA sleep current sets a high standard for battery-operated applications.
Developer-Friendly: The standard SPI interface and available code examples lower the barrier to entry for wireless development. [💾 GitHub Code Repository]
Market-Ready Compatibility: Direct compatibility with the Sigfox and Arduino ecosystems accelerates product development and certification.

Still Evaluating? [🔄 Compare N511BS-B with Other Narrowband Modules]

7. Ordering Information

Order Code	Core IC	Target Frequency Range	Output Power	Key Application
N511BS-B-169M	CC1125	160 – 175 MHz	+15 dBm	EU Utility Metering & Sigfox
N511BS-B-433M	CC1125	410 – 480 MHz	+15 dBm	Global ISM & Consumer IoT
N511BS-B-868M	CC1125	860 – 960 MHz	+15 dBm	European Sigfox & LPWAN

Unsure which frequency to choose? [🛠️ Consult an Engineer for Selection Advice]

Need Higher Power? Explore Our CC1125 High-Performance Series

The N511BS-B provides a balanced, cost-effective foundation for most narrowband applications. If your project requires extended transmission range or higher output power for challenging environments, explore our enhanced, high-power (G)FSK modules built on the same reliable CC1125 platform.

Dimension	High-Performance Module (+25 dBm)	Extended Range Module (+27 dBm)	Maximum Power Module (+33 dBm)
Product Model	N515BS-B Module	N516BS-B Module	N518BS Module
Core IC(s)	CC1125 + High-Efficiency PA	CC1125 + CC1190 Front-End	CC1125 + Industrial-Grade PA
Protocol Support	(G)FSK, MSK, OOK	(G)FSK, MSK, OOK	(G)FSK, MSK, OOK
Key Upgrade Highlights	+25 dBm (~0.3W) • Ideal for urban/suburban networks • ~60% range improvement over +15dBm • Balanced power consumption	+27 dBm (~0.5W) • Designed for rural/rugged deployments • Excellent penetration through dense vegetation & structures	+33 dBm (~2W) • Maximum legal power for industrial use • Ultra-long-haul backbone links (>15km)
Learn More	[View N515BS-B Details]	[View N516BS-B Details]	[View N518BS Details]

How to Choose Within the CC1125 Series?

Choose the N511BS-B if you are developing typical narrowband applications that require +15dBm output, ultra-low power consumption, and optimal cost. It's perfect for smart meters, environmental sensors, and most battery-operated IoT devices.
Upgrade to the N515BS-B if your application operates in urban environments with obstructions or needs approximately 60% more range than the standard module. This is ideal for smart city infrastructure and building management systems that require a higher link budget.
Choose the N516BS-B for rural, agricultural, or geographically challenging deployments where distance is critical. With +27dBm output, it can cover large farms, forests, or uneven terrain where standard modules may struggle.
Select the N518BS only for mission-critical industrial applications that require the maximum possible communication range and can accommodate higher power consumption. This includes remote telemetry, critical infrastructure monitoring, and applications where communication reliability cannot be compromised.

Next Steps: Start Your Design

📍 Get Hardware & Support
🛒 Request a Sample or Evaluation Kit
💬 Contact Technical Support]
📞 Schedule a 1-on-1 Technical Consultation

Explore Our Complete CC1125-Based Narrowband Family:
📻 N511BS-B Foundation - +15dBm, Ultra-Low Power, Cost-Optimized
⚡ N515BS-B High-Performance - +26dBm, The Balanced Choice
🚀 N516BS-B Extended Range - +27dBm, Complex Terrain
💎 N518BS Maximum Power - +33dBm, Backbone Links

💎 N519BS Maximum Power - +37dBm, Backbone Links

🔗 View CC1125 Full Series Comparison