TDA837x

Available in all ICs:
· Vision IF amplifier with high sensitivity and good figures for differential phase and gain
· PLL demodulator for the IF signal
· Alignment-free sound demodulator
· Flexible source selection with a CVBS input for the internal signal and Y/C or CVBS input for the external signal
· Audio switch
· The output signal of the CVBS (Y/C) switch is externally available
· Integrated chrominance trap and band-pass filters (auto-calibrated)
· Luminance delay line integrated
· A symmetrical peaking circuit in the luminance channel
· Black stretching of non-standard CVBS or luminance signals
· RGB control circuit with black current stabilization and white point adjustment
· Linear RGB inputs and fast blanking
· Horizontal synchronization with two control loops and alignment-free horizontal oscillator
· Slow start and slow stop of the horizontal drive pulses
· Vertical count-down circuit
· Vertical driver optimized for DC-coupled vertical output stages
· I2C-bus control of various functions
· Low dissipation
· Small amount of peripheral components compared with competition ICs.

The various versions of the TDA837x series are I²C-bus controlled single-chip TV processors which are intended to be applied in PAL/NTSC (TDA8374 and TDA8375) and NTSC (TDA8373 and TDA8377) television receivers.

All TDA837xs are available in an SDIP56 package and some versions are also available in a QFP64 package. The ICs are pin compatible so that with one application board NTSC and PAL/NTSC (or multistandard together with the SECAM decoder TDA8395) receivers can be built.
Functionally this IC series is split in to 2 categories:
· Versions intended to be used in economy TV receivers with all basic functions
· Versions with additional functions such as E-W geometry control, horizontal and vertical zoom function and YUV interface which are intended for TV receivers with 110° picture tubes.

The various type numbers are given in Table 1.

The detailed differences between the various TDA837xs are given in Table 2.