SX1239IMLTRT Semtech, SX1239IMLTRT Datasheet - Page 35

• Manufacturer Part Number: SX1239IMLTRT
• Description: IC, RF RECEIVER, 1.02GHz, QFN-24
• Manufacturer: Semtech

Specifications of SX1239IMLTRT

• Applications: Wireless Sensor Networks, Automated Meter Reading, Home And Building Automation
• Receiving Current: 16mA
• Data Rate: 300Kbps
• Modulation Type: FSK, OOK
• Sensitivity Dbm: -120dBm
• Rohs Compliant: Yes
• Rf Ic Case Style: QFN
• No. Of Pins: 24
• Sensitivity (dbm): -120dBm
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Upon detection of a valid packet, the sequencing is altered, as shown below:
Listen mode can be disabled by writing ListenOn to 0
4.3.4. RC Timer Accuracy
All timings of the Listen Mode rely on the accuracy of the internal low-power RC oscillator. This oscillator is automatically
calibrated at the device power-up, and it is a user-transparent process.
For applications enduring large temperature variations, and for which the power supply is never removed, RC calibration
can be performed upon user request. RcCalStart in RegOsc1 can be used to trigger this calibration, and the flag
RcCalDone will be set automatically when the calibration is over.
Rev 3 - Jan 2011
ADVANCED COMMUNICATIONS & SENSING
ListenEnd = 00
ListenEnd = 01
ListenEnd = 10
PayloadReady
ListenCriteria
Listen Mode
Listen Mode
Listen Mode
passed
Figure 18. Listen Mode Sequence (wanted signal is received)
Idle
Idle
Idle
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Rx
Rx
Rx
Idle
Mode
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SX1239
Rx