Features: · Full horizontal plus vertical autosync capability; TV and VCR code included· Extended horizontal frequency range from 15 to130 kHz· Comprehensive set of I2C-bus driven geometry adjustments and functions, including standby mode· Very good vertical linearity· Moire cancellation· Start-up...
TDA4853: Features: · Full horizontal plus vertical autosync capability; TV and VCR code included· Extended horizontal frequency range from 15 to130 kHz· Comprehensive set of I2C-bus driven geometry adjustmen...
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HSYNC (pin 15) TDA4853 is the input for horizontal synchronization signals, which can be DC-coupled TTL signals (horizontal or composite sync) and AC-coupled negative-going video sync signals. Video syncs are clamped to 1.28 V and sliced at 1.4 V. This results in a fixed absolute slicing level of 120 mV related to top sync.
For TDA4853 DC-coupled TTL signals the input clamping current is limited. The slicing level for TTL signals is 1.4 V.
The separated sync signal (either video or TTL) is integrated on an internal capacitor to detect and normalize the sync polarity.
The presence of equalization pulses is allowed for correct function of the PLL1 phase detector only in TV mode.