ISL9492

3

FN6547.1

March 17, 2011

16

SDA

17

SCL

18

TXT

Tx, Rx switch control

19

EXTM

This pin can be used in two ways:

1. To drive TONE with the actual tone signal directly.

2. To drive TONE with the envelope of the actual tone signal to be generate by this device.

20, 25

LDO_SGND

Small signal ground for the internal LDO.

21

FLT

This is an open drain output from the controller. It will go LOW when any of the fault flags is set.

22

TCAP

Capacitor for setting rise and fall time of the output voltage. Typical value is 0.1µF.

23

DGATE

Connect to an external PMOS gate to short the RLC tank circuit during 22kHz tone transmission.

24

VOUT

Linear regulator output provides the LNB power.

26

VSW

Input to the linear regulator that actually provides the LNB output voltage.

27

CPVOUT

Output of charge pump.

28

CPSWOUT

Charge pump connection 2.

-

Pad

There is no connection with this pin. EPAD also has no connection and should be connected to GND

plane with multiple vias.

PIN

SYMBOL

FUNCTION