DESCRIPTION

The M52390FP is a single-chip semiconductor integrated circuit which has a function to convert R/G/B signal to NTSC/PAL composite video signal and the superimpose function.

FEATURES

RGB encode

• LPF for chroma difference signal is built-in. Cutoff frequency control is possible by connecting a resistor externally.

• Because VCA circuit is built-in, gain control at chroma block is possible.

• Carrier leak is on a low level because of built-in high-precision modulation circuit and clamp circuit.

• Burst signal and sync signal are generated within the IC.

Superimpose function

• Ys IN (control input) is used for switching 2 input signals, VIDEO IN and RGB IN.

• Because high-speed analog switch is built-in, even microscopic characters can be inserted.

• Built-in an APC circuit to adjust tint of the parent picture (VIDEO IN) and the RGB encode signal automatically.

Overall functions

• A drive circuit (75Ω) can be configured with one transistor by outputting the video output signal at 2VP-P.

• This device can be used for both NTSC system and PAL system.

APPLICATION

  TV, VCR, monitor, and other AV equipments