ETRX357HR Silicon Labs Integrated Circuit (Other) In Stock
Silicon Labs Telegesis ETRX357HR is a ZigBee 802.15.4 radio module with a U.FL antenna connector, 2.4 GHz operation, and AT command interface for rapid wireless mesh network deployment in industrial and smart-energy applications. Available from stock with worldwide shipping.
- Manufacturer
- Silicon Labs
- Package
- Other
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- ETRX357HR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- IEEE 802.15.4 ZigBee-compliant 2.4 GHz radio module with U.FL connector for external antenna, enabling extended RF range in building automation and AMR networks
- AT command-based host interface allowing rapid integration with any UART-equipped microcontroller without a ZigBee stack license or RF expertise
- Mesh networking topology support for up to hundreds of nodes with self-healing routing, ideal for industrial monitoring and smart-energy meter deployments
- Compact SMT module footprint (R309 revision) simplifying regulatory approval re-use and reducing time-to-market for OEM wireless sensor products
Applications
The ETRX357HR is used in smart-energy AMR (automatic meter reading) networks, building automation systems, and industrial wireless sensor networks operating on the 2.4 GHz IEEE 802.15.4 band. Its U.FL connector supports external dipole or patch antennas for extended range through walls and across multi-story buildings, where the mesh routing protocol maintains connectivity even if individual nodes lose power. The module's AT command interface allows embedded designers to add ZigBee wireless capability to existing UART-based microcontroller designs without rewriting the radio stack.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ETRX357HR:
suggested
Frequently Asked Questions
What radio frequency band and protocol does the ETRX357HR support for mesh networking?
The ETRX357HR operates on the 2.4 GHz ISM band using the IEEE 802.15.4 physical layer and the ZigBee mesh networking protocol. It supports channel selection across 16 channels between 2405 MHz and 2480 MHz, and its mesh routing allows data to hop through intermediate nodes to reach a coordinator up to hundreds of meters away in open-air deployments.
How does the U.FL antenna connector on the ETRX357HR affect deployment range and antenna selection?
The U.FL connector on the ETRX357HR allows designers to attach external dipole, patch, or directional antennas, significantly extending the operating range beyond what an integrated PCB antenna provides. An external 2.4 GHz dipole antenna can increase line-of-sight range to over 1 km at 250 kbit/s data rate, making the module suitable for outdoor AMR and agricultural sensor networks.
Which host microcontroller interfaces are needed to communicate with the ETRX357HR using AT commands?
The ETRX357HR uses a standard UART serial interface with AT commands at baud rates from 1200 to 115200 bps, requiring only 2 wires (TX and RX) from a host microcontroller. This simple interface means any 3.3 V UART-capable MCU, such as an STM32 or PIC32, can control ZigBee network formation, node discovery, and data transmission without implementing the 802.15.4 stack on the host.
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