RN41R-I/RM Equivalent & Substitute Parts

Part Overview

The RN41R-I/RM is a Bluetooth v2.1 +EDR Class 1 transceiver module manufactured by Microchip Technology, designed for 2.4GHz wireless communication applications. This module integrates RF circuitry with an on-chip antenna and supports multiple serial interfaces including SPI, UART, and USB. The product is currently obsolete, making identification of compatible substitute components essential for legacy system maintenance, redesigns, and continued production support.

Substiute Parts

RN41R-I/RM

Microchip TechnologyIn Stock: 761RN41R-I/RM Datasheet

Current PartRFQ

RN171XVW-I/RM

Microchip TechnologyIn Stock: 2140RN171XVW-I/RM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RN41R-I/RM operates as a Bluetooth transceiver module with integrated antenna and multi-protocol serial interface support. Substitution analysis is based on the following critical parameters:

• RF standard and frequency band (2.4GHz ISM band operation)
• Mounting technology (Surface Mount)
• Supply voltage compatibility (3V ~ 3.6V range)
• Operating temperature range (-40°C ~ 85°C)
• RoHS and regulatory compliance status
• Manufacturer ecosystem (Microchip Technology)

The identified substitute, RN171XVW-I/RM, operates within the same 2.4GHz frequency band and shares identical supply voltage and temperature specifications. However, this substitute implements WiFi 802.11b/g protocol rather than Bluetooth, representing a functional protocol change that requires system-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

Selection of the RN171XVW-I/RM as a substitute for the RN41R-I/RM requires evaluation of the following engineering factors:

Protocol Compatibility: The RN41R-I/RM implements Bluetooth v2.1 +EDR, while the RN171XVW-I/RM implements WiFi 802.11b/g. These are distinct wireless protocols with different stack implementations, device pairing mechanisms, and network topologies. System firmware and host application modifications are necessary.

Power Budget: The RN171XVW-I/RM exhibits significantly higher transmit current consumption (180mA versus 65mA). Power supply design and battery life calculations must be re-evaluated for systems with constrained power budgets.

Physical Integration: The RN171XVW-I/RM uses a 49-SMD package compared to the 35-SMD package of the RN41R-I/RM. PCB layout redesign is required, including antenna placement and RF trace routing modifications.

Serial Interface Reduction: The RN171XVW-I/RM supports only UART, eliminating SPI and USB interface options available on the RN41R-I/RM. Host microcontroller interface architecture may require modification.

Regulatory and Compliance Status: Both modules maintain ROHS3 compliance and operate within identical temperature specifications, supporting legacy system requirements.

Frequently Asked Questions (FAQ)

Q: Can the RN171XVW-I/RM directly replace the RN41R-I/RM without modifications?

A: No. The RN171XVW-I/RM implements WiFi 802.11b/g protocol instead of Bluetooth v2.1 +EDR. This requires firmware changes, host application modifications, and potentially different device discovery and connection procedures. Additionally, the different package footprint (49-SMD versus 35-SMD) necessitates PCB redesign.

Q: What are the power consumption implications of substitution?

A: The RN171XVW-I/RM draws 180mA during transmission compared to 65mA for the RN41R-I/RM. This 2.77x increase in transmit current requires re-evaluation of power supply capacity, voltage regulation, and battery life calculations for portable applications.

Q: Are the antenna types compatible?

A: No. The RN41R-I/RM uses an integrated chip antenna, while the RN171XVW-I/RM uses an integrated wire antenna. Different RF characteristics and PCB layout requirements apply. Antenna tuning and impedance matching may differ between implementations.

Q: What serial interfaces are available on the substitute?

A: The RN171XVW-I/RM supports UART only. The RN41R-I/RM provides SPI, UART, and USB interfaces. If your system requires SPI or USB communication, the RN171XVW-I/RM is not suitable without additional interface conversion circuitry.

Q: Are both modules compliant with current regulatory standards?

A: Yes. Both the RN41R-I/RM and RN171XVW-I/RM are ROHS3 compliant and operate within identical temperature ranges (-40°C ~ 85°C), supporting legacy system requirements and current manufacturing standards.

Q: What is the data rate difference between these modules?

A: The RN41R-I/RM supports 3Mbps Bluetooth data rate, while the RN171XVW-I/RM supports 54Mbps WiFi 802.11b/g data rate. The higher data rate of the substitute may benefit bandwidth-intensive applications but requires protocol-level changes to utilize.