Chip introduction RF112-B coding transmitter chip integrates RF SAW oscillator transmission circuit and 1527 coding, (SOP8) SMD package, the chip has 4 key transmission ports, users do not need to manually set the address, each chip has a unique coding address, 1 million sets of codes are not repeated. RF112-B has internal SAW frequency stabilization, stable performance, ultra-small size, basically no peripheral parts, no debugging, can realize the existing 3356 transmission circuit + SAW + coding chip solution, reducing the user\'s product volume and cost. RF112-B has a built-in key detection automatic shutdown function, extremely low standby power consumption, and has output overcurrent protection, over-temperature protection, undervoltage abnormal protection and other functions. The standby current is less than 0.1uA, and can be powered by a 2032 button battery. RF112-B only needs to add a few peripheral parts, add 2 inductors and 2 capacitors to the antenna output PCB antenna, and it can be made into a wireless remote control that meets FCC and other certification standards. RF112-B can use a simple antenna matching network. Connect an inductor and capacitor and a 15-23 cm long straight wire from the 2nd pin of the signal output end to achieve a better transmission effect. The extremely small size of RF112 can be made into a miniature coding transmitter. RF112-B has 2 frequencies: 315M and 433.92M. RF112-B has a key protection function. If the key is pressed by mistake for 10 seconds, it will automatically stop transmitting to protect the battery loss and reduce interference to the space. RF112-B is an upgraded version in December 2017. Chip features Transmitting power: 13dBm Modulation mode: OOK/ASK Standby current: less than 0.1uA Transmitting current: 10mA Automatic power off when long pressed for 10 seconds Chip application Security access control system・Wireless alarm Security fire protection system・Wireless remote control Remote control alarm system・Smart home
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