TDA4556 - NXP

TDA4556 Multistandard decoder

The TDA4555 and TDA4556 are monolithic integrated multistandard colour decoders for the PAL, SECAM, NTSC 3,58 MHz and NTSC 4,43 MHz standards. The difference between the TDA4555 and TDA4556 is the polarity of the colour difference output signals (B-Y) and (R-Y). Features Chrominance part • Gain controlled chrominance amplifier for PAL, SECAM and NTSC • ACC r.

Features

Chrominance part
• Gain controlled chrominance amplifier for PAL, SECAM and NTSC
• ACC rectifier circuits (PAL/NTSC, SECAM)
• Burst blanking (PAL) in front of 64 µs glass delay line
• Chrominance output stage for driving the 64 µs glass delay line (PAL, SECAM)
• Limiter stages for direct and delayed SECAM signal
• SECAM permutator Demodulator part
• Flyback blanking incorporated in the two synchronous demodulators (PAL, NTSC)
• PAL switch
• Internal PAL matrix TDA4555 TDA4556
• Two quadrature demodulators with external reference tuned circuits (SECAM)
• Internal filtering of residual carrier .