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LNBH24 Datasheet(PDF) 9 Page - STMicroelectronics |
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LNBH24 Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 30 page LNBH24 Pin configuration 9/30 3 Pin configuration Figure 3. Pin connections 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A-GND DSQIN-B TTX-B DSQOUT-B ADDR-B NC LX-B P-GND-B P-GND-A LX-A SDA DETIN-B SCL ADDR-A 15 16 17 18 DSQOUT-A DSQIN-A DETIN-A TTX-A 32 31 30 29 28 27 26 25 24 23 EXTM-B VUP-B VCTRL-B VOTX-B VORX-B A-GND VCC VCC-L BYP VORX-A 36 VOTX-A 35 ISEL-B NC 34 NC 33 22 21 20 19 VUP-A ISEL-A VCTRL-A EXTM-A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A-GND DSQIN-B TTX-B DSQOUT-B ADDR-B NC LX-B P-GND-B P-GND-A LX-A SDA DETIN-B SCL ADDR-A 15 16 17 18 DSQOUT-A DSQIN-A DETIN-A TTX-A 32 31 30 29 28 27 26 25 24 23 EXTM-B VUP-B VCTRL-B VOTX-B VORX-B A-GND VCC VCC-L BYP VORX-A 36 VOTX-A 35 ISEL-B NC 34 NC 33 22 21 20 19 VUP-A ISEL-A VCTRL-A EXTM-A Table 2. Pin description Pin n° (sec. A/B) Symbol Name Function 29 VCC Supply input 8 to 15 V IC DC-DC power supply. 28 VCC–L Supply input 8 to 15 V analog power supply. 11 LX-A N-MOS Drain Integrated N-Channel power MOSFETs drain. 8LX-B 22 VUP-A Step-Up voltage Input of the linear post-regulators. The voltage on these pins is monitored by the internal step-up controllers to keep a minimum dropout across the linear pass transistors. 33 VUP-B 26 VoRX-A LDO output port Outputs of the linear post-regulators. See Table 6 for voltage selections and description. 31 VoRX-B 25 VoTX-A Output port during 22 kHz Tone TX TX Outputs to the LNB. See Table 6 for selection. 32 VoTX-B 12 SDA Serial data Bi-directional data from / to I2C BUS. 13 SCL Serial clock Clock from I2C BUS. 16 DSQIN-A DiSEqC inputs These pins will accept the DiSEqC code from the main microcontroller. The LNBH24 will uses this code to modulate the internally-generated 22 kHz carrier. Set to ground if not used. 4DSQIN-B |
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