DESCRIPTION

Intended for analog and digital satellite STB receivers/SatTV, sets/PC cards, the LNBS21 is a monolithic voltage regulator and interface IC, assembled in PowerSO-20, specifically designed to provide the power and the 13/18V, 22KHz tone signalling to the LNB downconverter in the antenna or to the multiswitch box. In this application field, it offers a complete solution with extremely low component count, low power dissipation together with simple design and I2CTM standard interfacing.

■ COMPLETE INTERFACE BETWEEN LNB

AND I2C™ BUS

■ BUILT-IN DC/DC CONTROLLER FOR

SINGLE 12V SUPPLY OPERATION

■ ACCURATE BUILT-IN 22KHz TONE

OSCILLATOR

■ SUITS WIDELY ACCEPTED STANDARDS

■ FAST OSCILLATOR START-UP FACILITATES

DiSEqC™ ENCODING

■ BUILT-IN 22KHz TONE DETECTOR

SUPPORTS BI-DIRECTIONAL DiSEqC™

■ LOOP-THROUGH FUNCTION FOR SLAVE

OPERATION

■ LNB SHORT CIRCUIT PROTECTION AND

DIAGNOSTIC

■ CABLE LENGTH DIGITAL COMPENSATION

■ INTERNAL OVER TEMPERATURE

PROTECTION