LNBH24 STMicroelectronics, LNBH24 Datasheet - Page 9

• Manufacturer Part Number: LNBH24
• Description: Dual LNB supply and control IC with step-up and I2C interface
• Manufacturer: STMicroelectronics

3
Figure 3.
Table 2.
(sec. A/B)
Pin n°
29
28
11
22
33
26
31
25
32
12
13
16
8
4
Pin configuration
Pin connections
Pin description
DSQIN-A
DSQIN-B
Symbol
V
V
V
V
V
V
V
LX-A
LX-B
SDA
oRX
oRX
oTX
oTX
SCL
V
CC–
UP
UP
CC
-A
-B
-A
-B
-A
-B
L
Output port during
DSQOUT-B
DSQOUT-B
DSQOUT-A
DSQOUT-A
Step-Up voltage
LDO output port
22 kHz Tone TX
DiSEqC inputs
P-GND-A
P-GND-A
N-MOS Drain
P-GND-B
P-GND-B
DETIN-B
DETIN-B
DSQIN-B
DSQIN-B
DSQIN-A
DSQIN-A
DETIN-A
DETIN-A
ADDR-A
ADDR-A
Supply input
Supply input
ADDR-B
ADDR-B
Serial clock
A-GND
A-GND
Serial data
TTX-B
TTX-B
TTX-A
TTX-A
LX-B
LX-B
LX-A
LX-A
SDA
SDA
NC
NC
SCL
SCL
Name
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
8 to 15 V IC DC-DC power supply.
8 to 15 V analog power supply.
Integrated N-Channel power MOSFETs drain.
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.
Outputs of the linear post-regulators. See
selections and description.
TX Outputs to the LNB. See
Bi-directional data from / to I²C BUS.
Clock from I²C BUS.
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.
36
36
35
35
34
34
33
33
32
32
31
31
30
30
29
29
28
28
27
27
26
26
25
25
24
24
23
23
22
22
21
21
20
20
19
19
VUP-A
VUP-A
ISEL-A
ISEL-A
VCTRL-A
VCTRL-A
EXTM-A
EXTM-A
EXTM-B
EXTM-B
VCTRL-B
VCTRL-B
ISEL-B
ISEL-B
VUP-B
VUP-B
VOTX-B
VOTX-B
VORX-B
VORX-B
A-GND
A-GND
VCC
VCC
VCC-L
VCC-L
BYP
BYP
VORX-A
VORX-A
VOTX-A
VOTX-A
NC
NC
NC
NC
Function
Table 6
for selection.
Table 6
for voltage
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