AN2713 datasheet(9/40 Pages) STMICROELECTRONICS

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AN2713

Pin description

Doc ID 14431 Rev 1

9/40

Pin description

The LNBH23 is available in exposed pad PowerSSO-24 or QFN32 packages for surface

mount assembly. Figure 4 shows the device pinouts for each package. Table 1 briefly

summarizes the pin functionality.

Figure 4.

LNBH23 pin configuration

Table 1.

LNBH23 pin description

Pin n°

QFN32

Pin n°

PSSO-24

Symbol

Name

Pin Function

VCC

Supply input

8 to 15 V IC DC-DC power supply

VCC–L

Supply input

8 to 15 V analog power supply

NMOS drain

Integrated N-channel power MOSFET drain

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

VoRX

LDO output port

Output of the integrated linear post-regulator

oTX

Output port for

22 kHz

tone TX

TX output to the LNB

SDA

Serial data

Bi-directional data from/to I2C bus

SCL

Serial clock

Clock from I2C bus

DSQIN

DiSEqC input

This pin accepts the DiSEqC code from the main

microcontroller. The LNBH23 uses this code to modulate

the internally-generated 22 kHz carrier. Set this pin to

ground if not used

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