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HT6222A Datasheet(PDF) 9 Page - Holtek Semiconductor Inc |
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HT6222A Datasheet(HTML) 9 Page - Holtek Semiconductor Inc |
9 / 19 page Application Circuits HT6220A Application Circuit Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.) HT6220A/HT6221A/HT6221B/HT6222A Rev. 1.10 9 June 1, 2010 K 2 1 I n p u t t > 1 2 6 m s K m I n p u t K 2 1 3 6 m s 3 6 m s 1 0 8 m s ( m i n . ) D O U T K m K 2 1 c o d e t r a n s m i s s i o n K 2 1 + K m c o d e t r a n s m i s s i o n Note: Km can be one of K22~K24 Timing 6. Valid Double-Key Input H T 6 2 2 0 A D 7 V S S 8 7 C 1 C 2 C 3 C 4 R 1 2 0 0 k W ´ 5 R 2 R 3 R 4 R 5 R 6 A I N 1 3 1 2 1 1 1 0 1 5 1 6 1 2 3 4 1 4 5 D O U T V D D 3 3 0 W 4 7 m F / 1 6 V I n f r a r e d 4 . 7 W 6 V D D L E D K 1 K 2 K 3 K 4 K 3 3 K 3 4 K 5 K 6 K 7 K 8 K 3 7 K 3 8 K 9 K 1 0 K 1 1 K 1 2 K 4 1 K 4 2 K 1 3 K 1 4 K 1 5 K 1 6 K 4 5 K 4 6 1 N 4 1 4 8 ´ 5 C 5 9 K 1 7 K 1 8 K 1 9 K 2 0 K 4 9 K 5 0 DOUT and IR LED After the transmission codes are sent, the DOUT pin generates transmission codes with a carrier, and the IR-LED goes low to drive a transmission indicator. The DOUT pin abbreviate exterior transistor, to provide large current driving ability. IRC The frequency of the internal RC(IRC) oscillator is de- pending on the temperature and operating voltage. At Ta=25 °C at 3.0V, the IRC has an accuracy of ±1 per cent. In the range of 0 °Cto70°C at 2.0V~3.6V, the accu- racy value of the RC frequency increases to the maxi- mum value of ±2 per cent. |
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