LNBH25L STMicroelectronics, LNBH25L Datasheet - Page 10

• Manufacturer Part Number: LNBH25L
• Description: LNB supply and control IC with step-up and IA?C interface
• Manufacturer: STMicroelectronics

Pin configuration
Table 2.
10/28
12, 13, 14, 24
1, 5, 10, 11,
Pin n°
Epad
22
Pin description (continued)
Symbol
DSQIN
Epad
N.C.
DiSEqC envelope
External 22 kHz
Not internally
Exposed pad
DSQIN for
connected
TTL input
Name
input
or
It can be used as DiSEqC envelope input or external 22 kHz TTL
input depending on the EXTM I²C bit setting as follows:
EXTM=0, TEN=1: it accepts the DiSEqC envelope code from the
main microcontroller. The LNBH25L uses this code to modulate the
internally generated 22 kHz carrier.
EXTM=TEN=1: it accepts external 22 kHz logic signals which
activate the 22 kHz tone output (refer to
Pull up high if the tone output is activated only by the TEN I²C bit.
To be connected with power grounds and to the ground layer
through vias to dissipate the heat.
Not internally connected pins. These pins can be connected to GND
to improve thermal performances.
Doc ID 022634 Rev 2
Pin function
Section 2.3
).
LNBH25L