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LNBH23L 数据表(PDF) 11 Page - STMicroelectronics |
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LNBH23L 数据表(HTML) 11 Page - STMicroelectronics |
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11 / 25 page ![]() LNBH23L Typical application circuit Doc ID 15335 Rev 4 11/25 5 Typical application circuit Figure 3. DiSEqC 1.x using internal 22 kHz tone generator D3 L1 C6 470nF Vin 12V to LNB 500mA max D2 { I2C Bus SDA SCL PDC LX Vup Vcc-L Vcc VoRX EXTM ADDR C1 C8 220nF LNBH23L TTX P-GND A-GND D1 C10 220nF C4 470nF VoTX ISEL R2 (RSEL) 15kOhm Byp C11 220nF DSQIN C15 47nF R9 1.5KOhm C3 Tone Enable control TTL D3 D3 L1 C6 470nF Vin 12V to LNB 500mA max D2 D2 { I2C Bus SDA SCL PDC LX Vup Vcc-L Vcc VoRX EXTM ADDR C1 C8 220nF C8 220nF LNBH23L TTX P-GND A-GND P-GND A-GND D1 D1 C10 220nF C10 220nF C4 470nF C4 470nF VoTX ISEL R2 (RSEL) 15kOhm R2 (RSEL) 15kOhm Byp C11 220nF Byp C11 220nF C11 220nF DSQIN C15 47nF R9 1.5KOhm R9 1.5KOhm C3 C3 C3 Tone Enable control TTL Tone Enable control TTL Figure 4. DiSEqC 1.x using internal 22 kHz tone generator and "optional" PDC circuit D3 L1 C6 470nF Vin 12V to LNB 500mA max D2 { I2C Bus SDA SCL PDC LX Vup Vcc-L Vcc VoRX EXTM ADDR C1 C8 220nF LNBH23L TTX P-GND A-GND D1 C10 220nF C4 470nF VoTX ISEL R2 (RSEL) 15kOhm Byp C11 220nF DSQIN C15 47nF R9 1.5KOhm C3 Tone Enable control TTL Diode 1N4148 *R7 22 Ohm *C14 1nF (*) OPTIONAL components. To be used only in case of heavy capacitive load *R5 2.2K Ohm 3.3V *TR1 *R8 150 Ohm D3 D3 L1 C6 470nF Vin 12V to LNB 500mA max D2 D2 { I2C Bus SDA SCL PDC LX Vup Vcc-L Vcc VoRX EXTM ADDR C1 C8 220nF C8 220nF LNBH23L TTX P-GND A-GND P-GND A-GND D1 D1 C10 220nF C10 220nF C4 470nF C4 470nF VoTX ISEL R2 (RSEL) 15kOhm R2 (RSEL) 15kOhm Byp C11 220nF Byp C11 220nF C11 220nF DSQIN C15 47nF R9 1.5KOhm R9 1.5KOhm C3 C3 C3 Tone Enable control TTL Tone Enable control TTL Diode 1N4148 *R7 22 Ohm *C14 1nF (*) OPTIONAL components. To be used only in case of heavy capacitive load *R5 2.2K Ohm 3.3V *TR1 *R8 150 Ohm |
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