Overview
The LC89972M is a CCD delay line for PAL television systems. It incorporates a comb filter for chrominance signal and a 1H delay line for luminance signal.

Features
• 5 V single-voltage power supply
• Built-in PLL 3 × frequency multiplier circuit allows 3 fsc operation from an fsc (4.43 MHz) input.
• Control pin switchable to handle PAL/GBI and 4.43 MHz NTSC systems.
• Built-in chrominance signal crosstalk exclusion comb filter features high-precision comb characteristics in an adjustment-free circuit.
• Built-in peripheral circuits allow applications to be constructed with a minimum number of external components.
• Positive-phase signal input/positive-phase signal output (luminance signal)

Functions
• Two CCD shift registers (for chrominance and luminance signals)
• CCD drive circuits
• CCD stage count switching circuit
• CCD signal adder
• Auto-bias circuit
• Sync tip clamping circuit (luminance signal)
• Center-bias circuit (chrominance signal)
• Sample-and-hold circuit
• PLL 3 × frequency multiplier
• 3 fsc clock output circuit
• RD voltage generator