RN42-I/RM Bluetooth Bluetooth v2.1 +EDR Transceiver Module[Video]: Datasheet, Features, and Pinout
2.4GHz Bluetooth -40°C~85°C 3V~3.6V UART Tray Integrated, Trace 300kbps 4dBm Bluetooth v2.1 +EDR, Class 2 35-SMD Module









2.4GHz Bluetooth -40°C~85°C 3V~3.6V UART Tray Integrated, Trace 300kbps 4dBm Bluetooth v2.1 +EDR, Class 2 35-SMD Module
The RN42-I/RM module is a class 2 Bluetooth radio with a tiny form factor and low power consumption. This article is going to introduce pinout, applications, features, and more details about RN42-I/RM.

Getting Started with the RN42 Bluetooth Module and Arduino
Overview of RN42-I/RM
The RN42-I/RM module is a class 2 Bluetooth radio with a tiny form factor and low power consumption that is perfect for designers who want to add wireless capability to their products without investing a lot of time and money in Bluetooth-specific hardware and software.
The RN42-I/RM is a complete embedded Bluetooth solution that supports several interface protocols, is easy to design in, and is completely certified. The RN42-I/RM delivers up to a 3-Mbps data rate over distances up to 10 meters, thanks to its high-performance PCB trace antenna (RN42) or external antenna (RN42N) and support for Bluetooth EDR.
RN42-I/RM Features
Fully qualified Bluetooth® version 2.1 module, supports version 2.1 + Enhanced Data Rate (EDR)
ASCII command interface over UART
Postage-stamp-sized form factor:
- RN42: 13.4 x 25.8 x 2.4 mm
- RN42N: 13.4 x 20.5 x 2.4 mm
Low-power (26A sleep, 3 mA connected, 30 transmit)
UART (SPP or HCI ) and USB (HCI only) data connection interfaces
Sustained SPP data rates: 240 Kbps (Slave mode),300 Kbps (Master mode)
HCI data rates: 1.5 Mbps sustained, 3.0 Mbps burst in HCI mode
Embedded Bluetooth stack profiles include GAP, SDP, RFCOMM, L2CAP protocols, with SPP, HID, and DUN profile support (does not require any host stack).
Bluetooth SIG qualified, end product listing
Castellated SMT pads for easy and reliable PCB mounting
Class 2 power amplifier with onboard PCB trace antenna (RN42) or external antenna (RN42N)
Compliance (RN42)
- Modular Certified for the United States (FCC) and Canada (IC)
- European R&TTE Directive Assessed Radio Module
- Australia/New Zealand/Japan/Korea/Taiwan
- Bluetooth SIG QDID
Integrated Crystal, Internal Voltage Regulator
RN42-I/RM Pinout

RN42-I/RM Pinout
RN42-I/RM Dimensions

RN42-I/RM Dimensions
RN42-I/RM Application Circuit

RN42-I/RM Application Circuit
Specifications
- TypeParameter
- Factory Lead Time12 Weeks
- Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Surface Mount - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
35-SMD Module - Number of Pins35
- Usage LevelAutomotive grade
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~85°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tray - Published2010
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
3 (168 Hours) - Number of Terminations32
- Voltage - Supply
Voltage - Supply refers to the range of voltage levels that an electronic component or circuit is designed to operate with. It indicates the minimum and maximum supply voltage that can be applied for the device to function properly. Providing supply voltages outside this range can lead to malfunction, damage, or reduced performance. This parameter is critical for ensuring compatibility between different components in a circuit.
3V~3.6V - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
UNSPECIFIED - Number of Functions1
- Supply Voltage
Supply voltage refers to the electrical potential difference provided to an electronic component or circuit. It is crucial for the proper operation of devices, as it powers their functions and determines performance characteristics. The supply voltage must be within specified limits to ensure reliability and prevent damage to components. Different electronic devices have specific supply voltage requirements, which can vary widely depending on their design and intended application.
3.3V - Frequency
In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.
2.4GHz - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
RN42 - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
R-XXMA-N32 - Operating Supply Voltage
The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.
3.3V - Interface
In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.
SPI, UART - Data Rate
Data Rate is defined as the amount of data transmitted during a specified time period over a network. It is the speed at which data is transferred from one device to another or between a peripheral device and the computer. It is generally measured in Mega bits per second(Mbps) or Mega bytes per second(MBps).
300kbps - Protocol
In electronic components, the parameter "Protocol" refers to a set of rules and standards that govern the communication between devices. It defines the format, timing, sequencing, and error checking methods for data exchange between different components or systems. Protocols ensure that devices can understand and interpret data correctly, enabling them to communicate effectively with each other. Common examples of protocols in electronics include USB, Ethernet, SPI, I2C, and Bluetooth, each with its own specifications for data transmission. Understanding and adhering to protocols is essential for ensuring compatibility and reliable communication between electronic devices.
Bluetooth v2.1 +EDR, Class 2 - Screening Level
In electronic components, the term "Screening Level" refers to the level of testing and inspection that a component undergoes to ensure its reliability and performance. This process involves subjecting the component to various tests, such as temperature cycling, burn-in, and electrical testing, to identify any defects or weaknesses that could affect its functionality. The screening level is typically determined based on the application requirements and the criticality of the component in the system. Components that undergo higher screening levels are generally more reliable but may also be more expensive. Overall, the screening level helps to ensure that electronic components meet the necessary quality standards for their intended use.
TS 16949 - Telecom IC Type
Telecom IC Type refers to integrated circuits specifically designed for telecommunications applications. These components facilitate various functions such as signal processing, data modulation and demodulation, and communication protocol handling. They can be used in devices like mobile phones, modems, and network equipment, ensuring reliable data transmission and reception. Telecom ICs support different standards and technologies, making them essential for modern communication systems.
TELECOM CIRCUIT - Power - Output
Power Output in electronic components refers to the amount of electrical power that a device can deliver to a load. It is typically measured in watts and indicates the effectiveness of the component in converting electrical energy into usable work or signal. Power Output can vary based on the component's design, operating conditions, and intended application, making it a critical factor in the performance of amplifiers, power supplies, and other electronic devices. Understanding the Power Output helps in selecting appropriate components for specific applications to ensure efficiency and reliability.
4dBm - RF Family/Standard
The parameter "RF Family/Standard" in electronic components refers to the specific radio frequency (RF) technology or standard that the component complies with or is designed for. RF technology encompasses a wide range of frequencies used for wireless communication, such as Wi-Fi, Bluetooth, cellular networks, and more. Different RF standards dictate the frequency bands, modulation techniques, data rates, and other specifications for communication systems. Understanding the RF family/standard of a component is crucial for ensuring compatibility and optimal performance in RF applications.
Bluetooth - Antenna Type
There are several different types of antennas in three broad categories: omni-directional, directional, and semi-directional.
Integrated, Trace - Serial Interfaces
A serial interface is a communication interface between two digital systems that transmits data as a series of voltage pulses down a wire. Essentially, the serial interface encodes the bits of a binary number by their "temporal" location on a wire rather than their "spatial" location within a set of wires.
UART - Current - Receiving
Current - Receiving refers to the amount of electrical current that an electronic component or device is capable of accepting from a power source or another component in a circuit. It indicates the maximum current that can be safely received without causing damage or malfunction. This parameter is crucial for ensuring compatibility and reliability in electronic designs, as exceeding the rated receiving current can lead to overheating or failure of the component.
25mA - Current - Transmitting
Current - Transmitting is a parameter used to describe the maximum amount of electrical current that an electronic component can handle while in the transmitting mode. This parameter is crucial for components such as transistors, diodes, and integrated circuits that are involved in transmitting signals or power within a circuit. Exceeding the specified current transmitting rating can lead to overheating, component failure, or even damage to the entire circuit. Designers and engineers must carefully consider this parameter when selecting components to ensure the reliability and performance of the electronic system.
30mA - Sensitivity (dBm)
Sensitivity (dBm) is a parameter used to measure the minimum input power level required for an electronic component or device to operate effectively. It is typically expressed in decibels relative to one milliwatt (dBm), which is a common unit of power measurement in the field of electronics. A higher sensitivity value indicates that the component can detect weaker input signals, making it more responsive and capable of functioning in low-power conditions. Sensitivity is an important specification for devices like receivers, sensors, and transducers, as it directly impacts their ability to detect and process signals accurately. Manufacturers often provide sensitivity ratings to help users understand the performance capabilities of the component in different operating conditions.
-80 dBm - Firmware Version
The "Firmware Version" parameter in electronic components refers to the specific version of software that is embedded in the hardware of the device. Firmware is a type of software that is permanently stored in the device's read-only memory (ROM) and is responsible for controlling the device's functions and operations. The firmware version indicates the specific release or iteration of the software that is currently running on the device. It is important to keep track of the firmware version as manufacturers often release updates to improve performance, fix bugs, or add new features to the device.
6.15 - Height2mm
- Length25.8mm
- Width13.4mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
RN42-I/RM Electrical Characteristics
| Parameter | Min. | Typ. | Max. | Units |
| Supply Voltage (DC) | 3 | 3.3 | 3.6 | V |
| Average Power Consumption | ||||
| Radio On (Discovery or Inquiry Window Time) | — | 40 | — | mA |
| Connected Idle (No Sniff) | — | 25 | — | mA |
| Connected Idle (Sniff 100 ms) | — | 12 | — | mA |
| Connected with Data Transfer | 40 | 45 | 50 | mA |
| Deep Sleep Idle Mode | — | 26 | — | uA |
RN42-I/RM Applications
• Cable replacement
• Barcode scanners
• Measurement and monitoring systems
• Industrial sensors and controls
• Medical devices
RN42-I/RM Manufacturer
Microchip Technology Inc. is a leading provider of microcontroller and analog semiconductors, delivering low-risk product development, reduced overall system cost, and faster time to market to thousands of customers across the world. Microchip, based in Chandler, Arizona, provides excellent technical support as well as consistent delivery and quality.
Datasheet PDF
- Datasheets :
- PCN Assembly/Origin :
- PCN Packaging :
- PCN Manufacturer Information :
- ConflictMineralStatement :
Popularity by Region
How many pins of RN42-I/RM?
35 Pins.
What’s the operating temperature of RN42-I/RM?
-40°C~85°C.
What’s the Voltage - Supply of RN42-I/RM?
3V~3.6V.
What’s the frequency of RN42-I/RM?
2.4GHz.
What’s the data rate of RN42-I/RM?
300kbps.
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