LNBH26LS datasheet(13/33 Pages) STMICROELECTRONICS

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LNBH26LS

Pin configuration

DocID025504 Rev 1

13/33

Pin n°

Symbol

Name

Pin function

carrier.

If EXTM-A=TEN-A=1: it accepts external 22 kHz logic

signals which activate the 22 kHz tone output (refer to

Section 2.2: "Data encoding by external 22 kHz tone TTL

signal").

Pull up high if the tone output is activated only by the TEN-A

I²C bit.

DSQIN-

DSQIN for

DiSEqC

envelope Input

external 22

KHz TTL input

It is intended for channel B 22 kHz tone control.

It can be used as DiSEqC envelope input or external 22 kHz

TTL input depending on the EXTM-B I²C bit setting as

follows:

If EXTM-B=0, TEN-B=1: it accepts the DiSEqC envelope

code from the main microcontroller. The LNBH26LS uses

this code to modulate the internally generated 22 kHz

carrier.

If EXTM-A=TEN-A=1: it accepts external 22 kHz logic

signals which activate the 22 kHz tone output (refer to

Section 2.2: "Data encoding by external 22 kHz tone TTL

signal").

Pull up high if the tone output is activated only by TEN-B I²C

bit.

Epad

Exposed pad

To be connected with power grounds and to the ground

layer through vias to dissipate the heat.

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