User's Manual

CT-EM250 ZigBee-Ready RF Transceiver Modules
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Absolute Maximum Ratings
Parameter Test Conditions Min. Max. Unit
Regulator voltage (VDD_PADS) - 0.3 3.6 V
Voltage on any GPIO[16:0], SIF_CLK,
SIF_MISO, SIF_MOSI, nSIF_LOAD, OSC32A,
OSC32B, nRESET,
- 0.3 VDD_PADS+
0.3
V
Storage temperature - 40 + 140 °C
Under no circumstances should the absolute maximum ratings given above be violated. Stress
exceeding one or more of the limiting values may cause permanent damage to the device.
Recommended Operating Conditions
Parameter Test Conditions Min. Typ. Max. Unit
Regulator input voltage (VDD_PADS) 2.1 3.6 V
Core input voltage (VDD_24MHZ, VDD_VCO,
VDD_RF, VDD_IF, VDD_PADSA,
VDD_FLASH, VDD_PRE, VDD_SYNTH,
VDD_CORE)
1.7 1.8 1.9 V
Temperature range - 40 + 85 °C
Electrical Specifications
T=25 ℃, VCC = 3.0V, fo=2450Mhz, if nothing else stated.
Parameter Min. Typ. Max Unit Condition / Note
Operating frequency 2405 2480 M Programmable in 5 MHz steps for
IEEE 802.15.4 compliance
Number of channels 16 For IEEE 802.15.4 compliance
Channel spacing 5 MHz For IEEE 802.15.4 compliance
Input/output impedance 50 Ohm
Data rate 250 kbit/s
DSSS chip rate 2 Mc/s
Frequency stability +/-40 ppm
Transmit power -32 5 dBm Programmable from firmware
Harmonics
2nd harmonic TBD dBm
3rd harmonic TBD dBm