BL 54573B TV Band Switches Integrated Circuit Description BL54573B is a high frequency tuner’s band decoder nd driver. It decodes the hand switches signals from remoter and drives the tuner, so completing hand switch function. Pin Assignment Features ● Direct used between remoter and tuner .The external circuit is simple. ● Uses 12V of inner voltage ● Open collector output ● Single 8 pins plastic package Applications Band switches for remote system Application Circuit BL54573 used in Mitsubishi color TV remote system BL54573 1 2 3 4 5 6 7 8 +12V BV GND TO HF Tuner 120K 120K BL50436 BAND1 BAND2 BS BU Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233