MK5087 general infrared remote control transmitter circuit (dual-tone multiple-frequency signal generating circuit)

Published:2011/7/17 9:12:00 Author:Christina | Keyword: general, infrared, remote control, transmitter, dual-tone, multiple-frequency, signal, generating circuit | From:SeekIC

The MK5087 is designed as one kind of dual-tone multiple-frequency signal generating circuit that can be used in the radio transmission circuits. The internal circuit is composed of the clock oscillating circuit, the keyboard control logic circuit, the programmable frequency divider, the bass group D/A circuit, the treble group D/A circuit, the counting circuit and the squelch circuit. Features The voltage range of the power supply is 2.5-15V,The 16-pin dual-row DIP plastic package. Function description It can set 64 conventional keys and 32 unified keys freely.All the keys can output the repetitive pulse sequence.When there is no key operation, the oscillation circuit will stop working.The external, LC circuit, ceramic filters and crystal oscillator can produce the 440kHz oscillating wave.The LED display.The output pulse is composed of the 5-bit conventional code, the 6-bit data code, the 5-bit conventional RP code and the 6-bit data RP code.



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