BA7149F

Video ICs Electronic viewfinder driver BA7149F The BA7149F is an electronic viewfinder driver for video cameras. It separates the synchronous signal from the input video signal, and outputs the vertical deflection drive output and horizontal deflection signals. HD and VD output signals with guaranteed phase difference are also provided for on-screen displays (OSD). The differences between the BA7149F and the BA7148F are the horizontal blanking, horizontal AFC output, HD output phase and pulse width. Applications Video cameras Features 1) Operates off a 5V power supply. 2) Built-in vertical deflection circuit. 3) Built-in wide-bandwidth amplifier. 4) Built-in HD and VD output terminals. 5) Few attached components required. 6) SOP 16pin package. 7) Compatible with 10µ sec flyback pulses. Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Max. Pd Topr Tstg Limits 8.0 500∗ – 20 ~ + 75 – 55 ~ + 125 Unit V mW °C °C ∗ Reduced by 5mW for each increase in Ta of 1°C over 25°C. Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 5.5 Unit V 1 Video ICs BA7149F Block diagram 16 15 14 13 12 11 10 9 H.OSC PHASE COMP 6dB AMP SYNC SEPA V.SEPA H.BLK V.BLK V.DRIVE V.OSC 1 2 3 4 5 6 7 8 Pin descriptions Pin No. 1 2 3 4 5 6 7 8 Function Vertical control input Power supply 1 Vertical deflection drive (POS) GND 1 Vertical def...