Murata Electronics RX5000 RF Receiver - Equivalent & Substitute Parts

Part Overview

The Murata Electronics RX5000 is a surface mount RF receiver module designed for ASK/OOK modulation at 433.92MHz with a sensitivity of -109dBm and maximum data rate of 115.2kbps. The device operates from 2.2V to 3.7V supply voltage with a receiving current of 3.8mA and is housed in a 20-SMD module package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

RX5000

Murata ElectronicsIn Stock: 2987RX5000 Datasheet

Current PartRFQ

RFM65W-433-S2

RF SolutionsIn Stock: 794RFM65W-433-S2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RX5000 is determined by the following critical parameters:

Frequency Compatibility: The substitute part must operate at or near 433MHz to maintain RF circuit tuning and antenna compatibility.

Modulation Support: The substitute must support OOK modulation as a minimum requirement, as this is the primary modulation scheme used by the RX5000. Additional modulation support (FSK, GFSK, GMSK, MSK) does not preclude substitution.

Sensitivity and Data Rate: The substitute must meet or exceed the sensitivity specification (-109dBm) and support the required data rate (115.2kbps minimum).

Supply Voltage Range: The substitute operating voltage must be compatible with or encompass the RX5000 supply range (2.2V ~ 3.7V).

Operating Temperature Range: The substitute must support the full operating temperature range (-40°C ~ 85°C).

Mounting and Package: Surface mount technology is required. Package form factor differences are acceptable provided the substitute is a module-level component suitable for PCB integration.

Moisture Sensitivity: MSL rating of 1 (Unlimited) is preferred to match the original part's handling requirements.

The RF Solutions RFM65W-433-S2 meets all substitution criteria and is classified as an active product with enhanced specifications in sensitivity and data rate.

Parameter Comparison

Engineering Selection Recommendations

The RF Solutions RFM65W-433-S2 is a qualified substitute for the obsolete Murata Electronics RX5000 based on the following factors:

Product Status: The RFM65W-433-S2 is classified as active and in current production, ensuring long-term availability and supply chain stability compared to the obsolete RX5000.

Compliance and Certifications: The RFM65W-433-S2 carries RoHS Compliant status, meeting modern environmental and regulatory requirements. Both parts share identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), simplifying handling and storage procedures.

Functional Equivalence: The substitute meets all critical electrical parameters. Sensitivity and data rate specifications exceed the original part requirements, providing design margin. OOK modulation support is confirmed, ensuring protocol compatibility with existing systems.

Design Considerations: The substitute operates within the overlapping supply voltage range (1.8V ~ 3.6V encompasses 2.2V ~ 3.7V). The receiving current of 16mA versus 3.8mA represents a significant increase; power budget analysis is required for battery-powered applications. The package form factor change from 20-SMD to 16-SMD necessitates PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the RFM65W-433-S2 directly replace the RX5000 without PCB modifications?

A: No. While electrically compatible, the package form factor differs (16-SMD versus 20-SMD). PCB footprint redesign is required. Electrical connections must be verified against manufacturer datasheets to ensure proper signal routing and power distribution.

Q: What is the impact of the increased receiving current (16mA vs 3.8mA)?

A: The substitute draws approximately 4.2 times more current during reception. For battery-powered applications, this significantly reduces operational runtime. Power supply capacity must be re-evaluated to ensure adequate current delivery without voltage droop.

Q: Are the frequency specifications compatible?

A: Yes. The RX5000 operates at 433.92MHz and the RFM65W-433-S2 at 433MHz. This 0.92MHz difference is within the typical tuning tolerance of RF receiver modules and antenna designs for the 433MHz ISM band.

Q: Does the substitute support all modulation schemes used by the RX5000?

A: Yes. The RFM65W-433-S2 explicitly supports OOK modulation, which is the primary scheme used by the RX5000. The substitute additionally supports FSK, GFSK, GMSK, and MSK, providing flexibility for future protocol implementations.

Q: What are the supply voltage considerations?

A: The RX5000 operates from 2.2V to 3.7V. The RFM65W-433-S2 operates from 1.8V to 3.6V. The overlapping range is 2.2V to 3.6V. Systems operating at voltages below 2.2V or above 3.6V require design modification.

Q: Is the substitute suitable for the same applications as the original part?

A: The RFM65W-433-S2 is specified for AMR, Home Automation, and Security applications. The RX5000 is specified for General Data Transfer. Application compatibility depends on specific system requirements and protocol implementation. OOK modulation support confirms compatibility with legacy RX5000-based systems.

Q: What compliance certifications should be verified before implementation?

A: The RFM65W-433-S2 is RoHS Compliant. Both parts carry identical REACH and MSL classifications. Regional regulatory compliance (ECCN, HTSUS) should be verified against your specific market and application requirements.