RM186-SM RF Transceiver Module Equivalent & Substitute Parts

Part Overview

The RM186-SM is a General ISM < 1GHz LoRa™ Transceiver Module manufactured by Laird Connectivity Inc., designed for applications requiring sub-1GHz wireless communication in the 863MHz to 870MHz frequency band. This surface mount module integrates RF transmission and reception capabilities with I2C, SPI, and UART serial interfaces, operating across an industrial temperature range of -40°C to 85°C.

The RM186-SM is designated as Last Time Buy, indicating discontinued production status. This product status necessitates identification of equivalent and substitute components to ensure design continuity and supply chain reliability for ongoing and future applications.

Substiute Parts

RM186-SM

Laird Connectivity Inc.In Stock: 1099RM186-SM Datasheet

Current PartRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RM186-SM is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• RF Family/Standard: General ISM < 1GHz
• Protocol: LoRa™
• Frequency Range: 863MHz ~ 870MHz (European ISM band)
• Serial Interfaces: I2C, SPI, UART compatibility
• Antenna Interface: U.FL connector
• Voltage Supply Range: 1.8V ~ 3.6V
• Mounting Type: Surface Mount
• Package Type: SMD Module format
• RoHS Compliance: Required

Secondary Compatibility Parameters:

• Power Output: 14dBm or equivalent
• Data Rate: 1Mbps or higher
• Operating Temperature: -40°C ~ 85°C or wider range
• Current Transmitting: 46mA or lower

No substitute parts have been identified from the provided input data. Substitute components must meet all primary criteria and maintain compatibility across serial interface protocols, frequency specifications, and physical form factor requirements.

Parameter Comparison

Engineering Selection Recommendations

The RM186-SM is classified as Last Time Buy, indicating end-of-life status with no further production planned. For applications currently utilizing this component, the following engineering considerations apply:

Supply Chain Strategy: Current inventory of 1046 pieces is available as new original stock. Design teams should evaluate long-term production requirements against available inventory to determine procurement strategy.

Compliance Requirements: Any substitute component must maintain RoHS Compliance certification to satisfy regulatory requirements equivalent to the RM186-SM.

Functional Continuity: Substitute components must support identical serial interface protocols (I2C, SPI, UART) to ensure firmware and hardware interface compatibility without redesign.

Frequency Band Alignment: The 863MHz to 870MHz frequency range is specific to European ISM band regulations. Substitute components must operate within this identical frequency specification to maintain regional compliance and interoperability.

Frequently Asked Questions (FAQ)

Q: What makes a component eligible as a substitute for the RM186-SM?

A: A substitute component must operate in the General ISM < 1GHz frequency band, support LoRa™ protocol, operate within the 863MHz to 870MHz frequency range, provide I2C, SPI, and UART serial interfaces, feature U.FL antenna connector, accept 1.8V to 3.6V supply voltage, use surface mount packaging in SMD module format, and maintain RoHS compliance.

Q: Can components with different frequency ranges substitute for the RM186-SM?

A: No. The 863MHz to 870MHz specification is fixed and region-specific. Components operating in different ISM bands (such as 915MHz or 2.4GHz) are not substitutes and would require complete system redesign.

Q: Are serial interface protocols interchangeable?

A: No. The RM186-SM provides I2C, SPI, and UART interfaces. Substitute components must support all three protocols to maintain compatibility with existing firmware and hardware designs.

Q: What is the significance of the U.FL antenna connector?

A: The U.FL connector is a specific physical interface standard. Substitute components must use identical U.FL connectors to ensure mechanical and electrical compatibility with existing antenna assemblies and PCB layouts.

Q: Does RoHS compliance affect substitution eligibility?

A: Yes. RoHS compliance is a mandatory requirement. Any substitute component must carry equivalent RoHS certification to satisfy regulatory and procurement standards.

Q: Can the RM186-SM be replaced with a component having higher power output?

A: Higher power output (above 14dBm) does not disqualify a component as a substitute, provided all other parameters remain within specification. However, higher power output may require additional regulatory evaluation depending on application requirements.

Q: What supply chain options exist given the Last Time Buy status?

A: Current available inventory of 1046 pieces represents the final production lot. Design teams must either secure sufficient inventory for production requirements or identify qualified substitute components before inventory depletion.