EM351-RTR Equivalent & Substitute Parts

Part Overview

The EM351-RTR is a Silicon Labs RF transceiver with integrated microcontroller designed for 802.15.4 Zigbee applications operating at 2.4GHz. This device combines a wireless transceiver and MCU in a single 48-VFQFN package, providing a complete wireless solution for low-power mesh networking applications.

The EM351-RTR carries a "Not For New Designs" product status, indicating it has been superseded. Organizations currently using this component or designing new systems require equivalent alternatives that maintain functional compatibility while offering improved performance characteristics or active product support.

Substiute Parts

EM351-RTR

Silicon LabsIn Stock: 4345EM351-RTR Datasheet

Current PartRFQ

EFR32MG13P732F512GM48-DR

Silicon LabsIn Stock: 202659EFR32MG13P732F512GM48-DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The EFR32MG13P732F512GM48-DR qualifies as a direct substitute for the EM351-RTR based on the following critical parameters:

Matching Parameters:

• RF Family/Standard: Both support 802.15.4
• Protocol Support: Both support Zigbee®
• Frequency Band: Both operate at 2.4GHz
• Package: Both use 48-VFQFN Exposed Pad form factor
• Mounting Type: Both are Surface Mount
• Operating Temperature Range: Both rated -40°C ~ 85°C
• RoHS Compliance: Both ROHS3 Compliant
• Moisture Sensitivity Level: Both MSL 2 (1 Year)

Enhanced Capabilities: The EFR32MG13P732F512GM48-DR provides expanded protocol support (Bluetooth v5.0, Thread in addition to Zigbee®), increased memory (512kB Flash vs 128kB), and active product status, making it suitable for new designs while maintaining backward compatibility with existing EM351-RTR applications.

Parameter Comparison

Engineering Selection Recommendations

The EFR32MG13P732F512GM48-DR is the appropriate substitute for EM351-RTR applications based on the following factors:

Product Status Alignment: The EM351-RTR is designated "Not For New Designs," while the EFR32MG13P732F512GM48-DR maintains Active status, ensuring continued manufacturer support, documentation updates, and supply chain availability.

Compliance Certification: Both devices maintain identical RoHS3 compliance and MSL 2 ratings, satisfying regulatory and environmental requirements without modification to existing qualification documentation.

Physical and Electrical Compatibility: Identical 48-VFQFN package geometry and pin configuration enable direct PCB layout reuse. Both devices operate within overlapping supply voltage ranges (2.1V–3.6V for EM351-RTR; 1.8V–3.8V for EFR32MG13P732F512GM48-DR), with the substitute offering extended lower voltage capability.

Protocol Compatibility: The EFR32MG13P732F512GM48-DR maintains full Zigbee® 802.15.4 support at 2.4GHz, ensuring network interoperability with existing EM351-RTR deployments. Additional protocol support (Bluetooth v5.0, Thread) provides design flexibility for future applications without requiring component redesign.

Memory and Performance: Increased flash memory (512kB vs 128kB) and RAM (64kB vs 12kB) accommodate more complex firmware implementations. Enhanced receiver sensitivity (-103.3dBm vs -102dBm) and higher transmit power (19dBm vs 8dBm) improve link budget performance.

Frequently Asked Questions (FAQ)

Q: Can the EFR32MG13P732F512GM48-DR be used as a direct replacement for EM351-RTR in existing designs?

A: Yes. Both devices use the 48-VFQFN package with identical pin configuration and footprint. Firmware modifications may be required to utilize the expanded memory and additional serial interfaces, but the core 802.15.4 Zigbee functionality is fully compatible.

Q: What are the key differences in power consumption between these devices?

A: The EFR32MG13P732F512GM48-DR demonstrates significantly lower receive current (8.4mA–14mA vs 22mA–28.5mA), resulting in improved battery life for receive-intensive applications. Transmit current ranges are broader due to expanded modulation support, but typical Zigbee operation remains efficient.

Q: Are there any supply voltage considerations when substituting?

A: The EFR32MG13P732F512GM48-DR supports a wider supply range (1.8V–3.8V vs 2.1V–3.6V). Existing designs operating at 2.1V–3.6V require no modification. Designs targeting lower voltages (1.8V–2.1V) can leverage the extended range of the substitute.

Q: Does the EFR32MG13P732F512GM48-DR maintain the same operating temperature range?

A: Yes. Both devices are rated for -40°C to 85°C operation, ensuring compatibility with existing thermal specifications and environmental requirements.

Q: What packaging options are available for the EFR32MG13P732F512GM48-DR?

A: The EFR32MG13P732F512GM48-DR is available in Cut Tape (CT) and Digi-Reel® packaging, providing flexibility for both prototype and production volume requirements.

Q: Are there any ECCN or HTSUS code differences?

A: Both devices share identical ECCN (5A992C) and HTSUS (8542.39.0001) classifications, simplifying export compliance and customs documentation.