DESCRIPTION

Intended for analog and digital satellite STB receivers/SatTV, sets/PC cards, the LNBP21 is a

monolithic voltage regulator and interface IC, assembled in SO-20 and PowerSO-20,

specifically designed to provide the power and the 13/18V, 22KHz tone signalling to the LNB down

converter 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 I2CTM 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 DiSEqCTM ENCODING

■ BUILT-IN 22KHz TONE DETECTOR SUPPORTS BI-DIRECTIONAL DiSEqCTM

■ LOOP-THROUGH FUNCTION FOR SLAVE OPERATION

■ LNB SHORT CIRCUIT PROTECTION AND DIAGNOSTIC

■ CABLE LENGTH DIGITAL COMPENSATION

■ INTERNAL OVER TEMPERATURE PROTECTION

■ ESD RATING 4KV ON POWER INPUT-OUTPUT PINS