BA7657F

Multimedia ICs Input selector switch for high definition displays BA7657F / BA7657S The BA7657F and BA7657S are for high definition displays, and have internal switches for switching between broadband RGB signals and HD / VD signals, as well as an internal synchronization separator. These ICs simplify the designing of input units for deluxe displays. Applications CRT display, HDTV, video board for personal computer, etc. Features 1) Operates on a single 5V power supply. 2) Internal broadband RGB switch (frequency characteristics: 230MHz, – 3dB). 3) Internal HD / VD switch. 4) Internal synchronization separator for synchronizing signals superimposed onto G signals. Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation BA7657F BA7657S Symbol VCC Pd Topr Tstg Limits 8.0 550∗ 1200∗ – 25 ~ + 75 – 55 ~ + 125 Unit V mW °C °C Operating temperature Storage temperature ∗ Reduced by 5.5mW (BA7657F) or 12mW (BA7657S) 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 Multimedia ICs BA7657F / BA7657S Block diagram Red 1 input 1 24 HD 1 input 1 2 HD Sync signal detector 2 23 HD 2 input Green 1 input 3 22 HD output 1 Ground 4 2 21 Red output Blue 1 input 5 DET 20 VCC 1 Ground 6 2 19 Green output Red 2 input 7 Syncsepa 18 Composite video input (Sync on Green) Ground 8 17 Composite sync output ...