LNBH23PPR datasheet(10/32 Pages) STMICROELECTRONICS

10 / 32 page

Pin configuration

LNBH23

10/32

Pin n° for

QFN32

Pin n° for

PSSO-24

Symbol

Name

Function

DSQOUT

DiSEqC output

Open drain output of the tone decoder to the main

microcontroller for DiSEqC 2.0 data decoding. It is LOW

when tone is detected on DETIN pin.

EXTM

External

modulation

External modulation logic input pin which activates the 22

kHz tone output on the VoTX pin. Set to ground if not used.

BYP

By-pass

capacitor

Needed for internal pre-regulator filtering. The BYP pin is

intended only to connect an external ceramic capacitor. Any

connection of this pin to external current or voltage sources

may cause permanent damage to the device.

ADDR

Address setting

Two I²C bus addresses available by setting the Address pin

level voltage. See address pin characteristics Table 10

ISEL

Current selection

The resistor “RSEL” connected between ISEL and GND

defines the linear regulator current limit threshold by the

equation: Imax(typ.)=10000/ RSEL.

VCTRL

Output voltage

control

13V-18V linear regulator VoRX switch control. To be used

only with VSEL=1. If VCTRL=1 or floating VoRX=18.5V (or

19.5V if LLC=1). If VCTRL=0 than VoRX=13.4V (LLC=either 0

or 1). Leave floating if not used. Do not connect to ground if

not used.

P-GND

Power ground

DC-DC converter power ground.

Epad

Exposed pad

To be connected with power grounds and to the ground layer

through vias to dissipate the heat.

A-GND

Analog ground

Analog circuits ground.

1, 2, 3, 7,

8, 16, 17,

23, 24,

25, 26,

31, 32

3, 4, 5,

21, 24

N.C.

Not connected

Not internally connected pins.

Table 2.

Pin description (continued)

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