LNBH221 datasheet(6/27 Pages) STMICROELECTRONICS

Il numero della parte	LNBH221

Spiegazioni elettronici	Dual LNB supply and control IC with Step-Up converter and I2C interface

PDF	27 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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Pin configuration

LNBH221

6/27

DSQOUT DiSEqC Output

Open drain output of the Tone Detector to the main

µcontroller for

DiSEqC data decoding. It is LOW when tone is detected on the

DETIN.

523

EXTM

External Modulation

External Modulation Input. Needs DC decoupling to the AC

source. If not used, can be left open.

GND

Ground

Circuit Ground. It is internally connected to the die frame for heat

dissipation.

1, 14,

18,

19,

32,

1, 14,

18,

19,

32,

BYP

Bypass Capacitor pin Needed for internal pre regulator filtering.

VOTX

Output Port during

22KHz Tone TX

Output of the linear post regulator/modulator to the LNB. See

truth table for voltage selections.

GND

Ground

To be connected to ground.

ADDR

Address Setting

Four I2C bus addresses available by setting the Address Pin

level voltage.

Table 3.

Pin description

Symbol

Name

Function

PIN Number

Sect:

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