Semtech’s new SX1243 is a fully integrated, low-cost FSK/OOK radio transmitter designed to replace surface acoustic wave (SAW)-based resonator transmitters in garage door openers, remote keyless entry (RKE) and other consumer remote control systems. It features a fractional-N phase lock loop (PLL) and covers the frequency bands from 310 MHz to 450 MHz, 860 MHz to 870 MHz, as well as 902 MHz to 928 MHz. To extend battery life, the device has very low active current consumption of 11 mA at +10 dBm OOK or 15 mA at +10 dBm FSK, making it suitable for applications requiring coin cell batteries, which only support peak currents up to 20 mA.
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