PT2262/PT2272 is a low-power low-cost general-purpose codec circuit manufactured by Pucheng Co., Ltd. in Taiwan. The PT2262/PT2272 can have up to 12-bit (A0-A11) tri-state address pin (suspended, connected). High level, connected to low level), Any combination can provide 531441 address code, PT2262 can have up to 6 bits (D0-D5) data terminal pin, the set address code and data code are serially output from 17-pin, which can be used for wireless remote control transmitting circuit. The encoded signal sent by the encoding chip PT2262 consists of: the address code, the data code, and the synchronization code to form a complete codeword. After the decoder chip PT2272 receives the signal, the address code undergoes two comparison checks, and the VT pin outputs a high level. At the same time, the corresponding data pin also outputs a high level. If the transmitting end keeps pressing the button, the encoding chip will also continuously emit. When the transmitter does not press the button, the PT2262 does not turn on the power, and its 17 pin is low level, so the 315MHz high frequency transmitting circuit does not work. When there is a button press, the PT2262 is powered, and the 17th pin is output. The modulated serial data signal, when the 17-pin is high, the 315MHz high-frequency transmitting circuit starts to oscillate and emits a constant-amplitude high-frequency signal. When the 17-pin is low-level, the high-frequency transmitting circuit of 3 15MHz stops oscillating, so The high-frequency transmitting circuit is completely controlled by the digital signal output from the 17-pin of the PT2262, so that the amplitude keying (ASK modulation) for the high-frequency circuit is equivalent to the amplitude modulation of 100% modulation. PT2262/PT2272 Features l. CMOS process manufacturing, low power consumption 2. Less external components 3. RC oscillating resistor 4. Wide operating voltage range: 2.6-15v 5. Data can be up to 6 digits 6. The address code can be up to 531,441 PT2262/PT2272 Application range Vehicle anti-theft system 2. Home security system 3. Remote control toy 4. Other electrical remote control For more details, please refer to PT2262/PT2272 PDF document: PT2262, PT2272 Chinese data download Huawei P20 Battery
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