Overview

The LC74411N and LC74411NE are digital processing controllers for PIP (picture-in-picture) systems in TV sets

and VCRs. These ICs incorporate three circuits, a multiplexed A/D converter, field memory, and a D/A converter, to implement the PIP digital processing block in a single chip.

Features

• Horizontal resolution: 450 pixels*

• Single-chip implementation of the three circuits required in a PIP digital processing block: A/D converter, field memory, and D/A converter circuits

• High image quality provided by vertical filtering

• I2C bus adopted

• Built-in PLL circuit (requires an external low-pass filter)

• Supports NTSC and PAL, TV and VCR applications, and multi-format (NTSC and PAL) applications.

• External control function

• 8-bit D/A converter (PWM type): 6 pins

• General-purpose ports: 8 pins

• Sub-screen specifications

• Display on/off, frame/no frame, frame color switching, wipe function

• Display position - Specifiable as an 8-bit value for each of the horizontal and vertical directions.

• Size

  Vertical reduction: 1/3, 1/4

  Horizontal reduction: 1/3, 1/4

– The horizontal size can be adjusted by adjusting the PLL divisor

– The display area vertical and horizontal positions can be varied independently.

• Horizontal resolution (Y signal): about 190 dots

• Quantization: 6 bits

• Operating supply voltage LC74411NE : 5 V ±5% LC74411N : 5 V ±10%

• Package

LC74411NE : QFP64E

LC74411N : DIP64S