LNBH25LS datasheet(12/30 Pages) STMICROELECTRONICS

12 / 30 page

Pin configuration

LNBH25LS

12/30

DocID026753 Rev 3

Symbol

Name

Function

VUP

Step-up voltage

Input of the linear post-regulator. The voltage on this

pin is monitored by the internal step-up controller to

keep a minimum dropout across the linear pass

transistor

DSQIN

DSQIN for

DiSEqC

envelope input

external 22 kHz

TTL input

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 LNBH25LS

uses this code to modulate the internally generated 22

kHz carrier.

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

signals which activate the 22 kHz tone output, refer to

Section 2.3: "Data encoding by external DiSEqC

envelope control through the DSQIN pin".

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

TEN I²C bit

Epad

Exposed pad

To be connected with power grounds and to the ground

layer through vias to dissipate the heat

1, 5, 10,

11, 12,

13, 14,

Not internally

connected

Not internally connected pins. These pins can be

connected to GND to improve thermal performance

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