EM35x System-on-Chip (SoC) / Network Co-Processor (NCP)​ for zigbee®

The EM35x chips for zigbee are the industry’s leading ARM® Cortex®-M3 based family of zigbee SoCs delivering unmatched performance, power consumption and code density in a compact package. The EM35x family combine a 2.4 GHz IEEE 802.15.4 radio transceiver with a 32-bit microprocessor, Flash memory and RAM with powerful hardware supported network-level debugging features. Combined with the powerful ecosystem of ARM tools, these devices and tools enable OEMs to simplify development and accelerate time to market.The EM35x SoCs are tightly integrated with EmberZNet PRO, a zigbee compliant mesh networking software which is the most deployed zigbee platform in the market.



  • Industry leading ARM Cortex-M3 based family of zigbee SoCs
  • Exceptional RF performance
  • 128 kB and 192 kB Flash variants available
  • 12 kB RAM
  • Large Flash/RAM variants to accommodate the most sophisticated applications
  • Lowest deep sleep current and multiple sleep modes
  • Excellent immunity to other 2.4 GHz devices for reliable co-existence
  • Built-in memory protection
  • Flexible antenna interface allows easy antenna connection with or without P
  • Flash guaranteed for 20,000 write cycles, enhances token storage capability via SIM-EEPROM
  • AES 128 hardware encryption engine with true random number generator
  • Hardware supported network level debugging with packet trace port
  • Capable of being zigbee Coordinator, Router, or End Device
  • Multi-networks feature supported by EmberZNet PRO

Getting Started with EM35x Zigbee SoCs

EM35x Mesh Networking Development Kit

The easiest way to begin development with the EM35x Zigbee SoCs family is with a EM35x Mesh Networking development kit.

View Kits

EM35x Product Matrix

Common Specifications

RAM (kB): 12

Frequency Min: 2400

Frequency Max: 2500

Data Rates: 250

Adj Channel Rejection (15.4): 35

2nd Adj Channel Rejection: 46

+12/-13 MHz 802.11g Rejection: 36

Total Link Budget: 110 (boost)

Deep Sleep Current: 0.4 (no timer)

RX Current: 26.5

TX Current: 31 (normal @ +3 dBm)

Crystal Frequency: 24

Part Number Data Sheet MCU Core Flash RAM Frequency Range Deep Sleep Current USB GPIO 2nd Adj Channel Rejection +12/-13 MHz 802.11g Rejection TX Power RX Current TX Current Crystal Frequency Temperature Range (ºC)
ARM Cortex-M3 128 12 2400 2500 0.4 (no timer) No 24 46 36 -55 8 26.5 31 (normal @ +3 dBm) 24 -40 85
EM357 (NRND)
ARM Cortex-M3 192 12 2400 2500 0.4 (no timer) No 24 46 36 -55 8 26.5 31 (normal @ +3 dBm) 24 -40 85
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