Ember - Wireless Semiconductor Solutions - Products - ZigBee Chips

The EM250 from Ember provides a ZigBee System-on-Chip that combines a 2.4GHz IEEE 802.15.4 compliant radio transceiver with a 16-bit microprocessor. The radio provides best-in-class RF performance with excellent sensitivity and transmit power for long range, and 802.11 immunity. A flexible RF interface minimizes external components in configurations with or without external LNA/PAs. Designed specifically for use with EmberZNet, Ember’s ZigBee compliant embedded mesh networking software, the EM250 is optimized for designs requiring long battery life, low external component count, and a reliable, proven, industry-standard networking solution. Innovative on-chip debugging (Insight Port) provides developers with the most advanced views into their application and network available in the industry.

12MHz XAP2b 16-bit microcontroller core
- 128kB Flash and 5kB RAM
- EEPROM emulation
- 2x16-bit general purpose timers
- UART/SPI (master)
- SPI (master/slave) / I²C (master)
- DMA on serial peripherals and radio minimizes processor overhead
- 128-bit AES hardware engine
- random number generator
- 12-bit sigma-delta ADC w/ 4 channels and differential operation
- battery/supply voltage monitor
- <1uA sleep current w/ internal RC oscillator running
- 17 GPIO
- watchdog timer
2.4GHz IEEE 802.15.4 Compliant Transciever
- +3dBm transmit power (+5dBm boost mode)
- excellent 802.11b/g rejection and interference immunity
- integrated TX/RX switch, minimizing external components
- optional 2nd RF path for easy addition of external PA/LNA
- hardware acceleration for key MAC functions
Single external crystal (24MHz)
on-chip regulator for 2.1-3.6V operation
InSight Port for advanced network debugging w/ InSight Desktop
- PacketTrace (non-intrusive trace of all packets)
- API Trace - trace of all EmberZNet API calls
- Virtual UART - high-speed memory mapped debugging UART
- SIF port- JTAG-like processor debug port

General Characteristics
Deep Sleep Current (with sleep timer running)	1uA max
RX Current (CPU@12MHz + RF)	35.5 mA - Normal Mode 37.5 mA - Boost Mode
TX Current (CPU@12MHz + RF)	35.5 mA - Normal Mode (+3dBm) 41.5 mA - Boost Mode (+5dBm)
Crystal Frequency	24MHz
Operating Temperature Range	-40° to +85° C
Voltage (internal reg)	2.1 to 3.6V
Package	7mm x 7mm, 48QLP

RF Characteristics
Data Rate	250kbps
Frequency	2400 MHz to 2485 MHz 16 - 5 MHz Channels
RX Sensitivity	-97.5 dBm - Normal Mode -98.5 dBm - Boost Mode
Adj Channel Rejection (15.4)	>35dB
Alt Channel Rejection (15.4)	>40dB
802.11g Rejection (+10/-10 MHz)	>40dB
TX Power	-32dBm to +3dBm - Normal Mode -32dBm to +5dBm - Boost Mode

Micro Characteristics
Operating Fequency	12MHz
Flash	128KB
RAM	5KB

More Information about the EM250