RXM-433-LC-S RF Receiver Equivalent & Substitute Parts

Part Overview

The RXM-433-LC-S is a surface-mount RF receiver module manufactured by TE Connectivity Linx, designed for ASK/OOK modulation at 433MHz frequency. This module is classified as obsolete and operates within the ISM band for applications including garage door openers and remote keyless entry (RKE) systems. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Key Parameters

Parameter	RXM-433-LC-S
Manufacturer	TE Connectivity Linx
Frequency	433MHz
Sensitivity	-95dBm
Data Rate (Max)	5kbps
Modulation/Protocol	ASK, OOK
Current - Receiving	5mA
Voltage - Supply	2.7V ~ 4.2V
Operating Temperature	-30°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SMD Module
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

The RXM-433-LR qualifies as a direct substitute for the RXM-433-LC-S based on the following substitution criteria:

Core Compatibility Parameters:

Identical frequency: 433MHz
Identical modulation protocols: ASK, OOK
Identical mounting type: Surface Mount
Identical package classification: 16-SMD Module
Identical manufacturer: TE Connectivity Linx
Identical base product family: RXM-433 series

Enhanced Performance Characteristics: The RXM-433-LR provides improved specifications compared to the RXM-433-LC-S, including higher sensitivity (-112dBm vs. -95dBm), increased maximum data rate (10kbps vs. 5kbps), and extended operating temperature range (-40°C to 70°C vs. -30°C to 70°C). These enhancements maintain backward compatibility while offering superior performance margins.

Parameter Comparison

Parameter	RXM-433-LC-S	RXM-433-LR	Compatibility Notes
Frequency	433MHz	433MHz	Identical
Sensitivity	-95dBm	-112dBm	Substitute offers improved sensitivity
Data Rate (Max)	5kbps	10kbps	Substitute supports higher data rates
Modulation/Protocol	ASK, OOK	ASK, OOK	Identical
Current - Receiving	5mA	5.2mA	Negligible difference
Voltage - Supply	2.7V ~ 4.2V	2.1V ~ 3.6V	Substitute range is narrower; verify supply compatibility
Operating Temperature	-30°C ~ 70°C	-40°C ~ 70°C	Substitute supports extended low-temperature operation
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	16-SMD Module	16-SMD Module	Identical
Data Interface	PCB, Surface Mount	Serial	Different interface types
Antenna Connector	PCB, Surface Mount	Castellation	Different connector types
Product Status	Obsolete	Active	Substitute is in active production
RoHS Status	RoHS non-compliant	RoHS Compliant	Substitute meets RoHS requirements

Engineering Selection Recommendations

The RXM-433-LR is the designated substitute for the obsolete RXM-433-LC-S. Selection of the RXM-433-LR is supported by the following engineering factors:

Product Status: The RXM-433-LC-S is classified as obsolete, making the active-status RXM-433-LR the appropriate replacement to ensure long-term component availability and supply chain continuity.

Regulatory Compliance: The RXM-433-LR achieves RoHS compliance, whereas the RXM-433-LC-S is RoHS non-compliant. For applications subject to RoHS directives or customer requirements, the RXM-433-LR satisfies modern regulatory standards.

Performance Enhancement: The RXM-433-LR provides superior sensitivity and data rate specifications, delivering improved performance margins without compromising the core 433MHz ASK/OOK functionality required by the original design.

Interface and Connector Differences: The RXM-433-LR uses Serial data interface and Castellation antenna connector, whereas the RXM-433-LC-S uses PCB surface-mount interfaces. PCB layout and firmware modifications are required to accommodate these interface differences during substitution.

Supply Voltage Consideration: The RXM-433-LR operates within a narrower supply voltage range (2.1V ~ 3.6V) compared to the RXM-433-LC-S (2.7V ~ 4.2V). Verify that system power supply specifications fall within the RXM-433-LR operating range before implementation.

Frequently Asked Questions (FAQ)

Q: Can the RXM-433-LR directly replace the RXM-433-LC-S without PCB modifications?

A: No. While both modules share identical frequency, modulation protocols, and package classification, the RXM-433-LR uses Serial data interface and Castellation antenna connector, whereas the RXM-433-LC-S uses PCB surface-mount interfaces. PCB layout redesign and firmware updates are required.

Q: What are the key substitution criteria for the RXM-433-LC-S?

A: Substitution is based on matching frequency (433MHz), modulation protocols (ASK/OOK), mounting type (Surface Mount), and package classification (16-SMD Module). The RXM-433-LR meets all these criteria while providing enhanced performance specifications.

Q: Is the RXM-433-LR compatible with systems designed for the RXM-433-LC-S supply voltage range?

A: The RXM-433-LR operates within 2.1V ~ 3.6V, which is narrower than the RXM-433-LC-S range of 2.7V ~ 4.2V. Designs operating at voltages above 3.6V or below 2.1V require power supply modification or alternative component selection.

Q: What is the primary reason to substitute the RXM-433-LC-S?

A: The RXM-433-LC-S is classified as obsolete. The RXM-433-LR is the active-production equivalent, ensuring component availability, supply chain reliability, and access to current manufacturing support.

Q: Does the RXM-433-LR meet modern regulatory requirements?

A: Yes. The RXM-433-LR is RoHS compliant, whereas the RXM-433-LC-S is RoHS non-compliant. For applications subject to RoHS directives, the RXM-433-LR satisfies regulatory requirements.

Q: How do the data rate specifications compare?

A: The RXM-433-LR supports a maximum data rate of 10kbps, compared to 5kbps for the RXM-433-LC-S. Systems designed for 5kbps operation are compatible with the RXM-433-LR, which provides additional bandwidth capacity.

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