XE1205I074TRLF Semtech, XE1205I074TRLF Datasheet - Page 21

• Manufacturer Part Number: XE1205I074TRLF
• Description: IC TXRX 433/868/915MHZ 48-VQFN
• Manufacturer: Semtech

Specifications of XE1205I074TRLF

• Frequency: 180MHz Center
• Data Rate - Maximum: 152.3kbps
• Modulation Or Protocol: FSK
• Applications: AMR, ISM, Home Automation, Process Control
• Power - Output: 0 ~ 15dBm
• Sensitivity: -121dBm
• Voltage - Supply: 2.4 V ~ 3.6 V
• Current - Receiving: 14mA
• Current - Transmitting: 62mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-VQFN
• Receiving Current: 14mA
• Transmitting Current: 62mA
• Data Rate: 4.8Kbps
• Modulation Type: FSK
• Rf Ic Case Style: VQFN
• No. Of Pins: 48
• Supply Voltage Range: 2.4V To 3.6V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: XE1205I074TR

The Frequency Synthesizer generates the local oscillator (LO) signal for the receiver section as well as the continuous
phase FSK (CPFSK) modulated signal for the transmitter section. The core of the synthesizer is implemented with a
Sigma-Delta PLL architecture. The frequency is programmable with a step-size of 500 Hz in the 433, 868 and 915 MHz
frequency bands. This block includes a crystal oscillator which provides the frequency reference for the PLL. This
reference frequency can also be used as a reference clock for the external microcontroller on the CLKOUT pin.
5.4.1
A reference clock can be generated for use by an external microcontroller. The OSCParam_Clkout configuration bit
controls the CLKOUT pin. When set to high, CLKOUT is enabled, otherwise it is disabled. The output frequency at
CLKOUT is defined by the value of the OSCParam_Clkout_freq(2:0) parameter. The output frequency at CLKOUT is the
reference oscillator frequency divided by 2, 4, 8, 16 or 32. With a reference oscillator frequency of 39 MHz this provides
a reference clock at 19.5 MHz, 9.75 MHz, 4.87 MHz, 2.44 MHz or 1.22 MHz, respectively.
This clock signal is disabled in Sleep Mode.
© Semtech 2008
5.4
FREQUENCY SYNTHESIZER
Clock Output for an external processor
21
XE1205
www.semtech.com