TDA8505

INTEGRATED CIRCUITS DATA SHEET TDA8505 SECAM encoder Preliminary specification Supersedes data of May 1993 File under Integrated Circuits, IC02 July 1994 Philips Semiconductors Philips Semiconductors Preliminary specification SECAM encoder FEATURES Two input stages, R, G, B and Y, −(R−Y), −(B−Y) with multiplexing. Chrominance processing, highly integrated, includes vertical identification, low frequency pre-emphasis and high frequency pre-emphasis (anti-Cloche) and bandpass filter. Fully controlled FM modulator which produces a signal in accordance with the SECAM standard without adjustments. Two reference oscillators, one for D'R f0 (4.40625 MHz) and one for D'B f0 (4.250 MHz). These oscillators are tuned by PLL loop with the frequency of the line sync as reference. Crystal tuning, or tuning by external reference source, of the reference oscillators is possible. Output stages, CVBS and separated Y + SYNC and CHROMA. For CVBS output, signal amplitude 2 V (p−p) nominal, thus only an external emitter follower is required for 75 Ω driving. Sync separator circuit and pulse shaper, to generate the required pulses for the processing, line, frame, FH/2 and chrominance blanking. A 3-level sandcastle pulse is generated for PAL/NTSC to SECAM transcoding. FH/2 input for locking with another decoder. Colour killing on the internal colour difference signals. Internal bandgap reference. ORDERING INFORMATION PACKAGE TYPE NUMBER PINS TDA8505 32 PIN POSITION SDIP32 MAT...