Overview

The LC89978M is a CCD delay line for multi television system that incorporates a comb filter to remove noise from the chrominance signal and a 1-H delay line for the luminance signal.

Features

• 5-V single-voltage power supply

• Built-in 4 × PLL frequency multiplier circuit allows 4fsc operation from an fsc (3.58 MHz) input.

• Can be switched between the NTSC/M, PAL/GBI, and PAL/M formats by setting control pin values.

• Includes a built-in crosstalk exclusion comb filter for the chrominance signal that provides high-precision comb characteristics in an adjustment-free circuit.

• Peripheral circuits provided on chip for operation with a minimum of external components.

• Positive-phase signal input, positive-phase signal output (luminance signal)

Functions

• CCD shift registers (for chrominance and luminance signals)

• Timing generator and clock driver for CCD

• Delay time selective circuit

• CCD signal adder

• Auto-bias circuit

• Sync tip clamp circuit (luminance signal)

• Center bias circuit (chrominance signal)

• Sample-and-hold circuit

• 4 × PLL frequency multiplier circuit

• 4fsc clock output circuit

• High voltage generator for CCD Reset Drain (RD).