Overview

The LC7442 and LC7442E are memory controller for PIP (picture-in-picture) systems for TV sets and VCRs. Since this IC includes 3 built-in D/A converter circuits on chip, a component-type PIP system can be constructed by combining this product with memory and an A/D converter such as the LC7480.

特性 Features

? Horizontal resolution: 600 TV lines*1

? Three built-in D/A converter provided on-chip in the PIP memory controller block

? High image quality display provided by vertical filter function frame display*2

? Built-in even/odd field determination circuit

? Built-in PLL circuit (requires external LPF)

? Handles NTSC/PAL, TV/VCR, and multi-mode systems (NTSC-PAL)*3

? Sub-screen specifications

— Display modes: 2-screen, 3-screen, and 4-screen*2

— Display on/off and frame on/off/color switching, wipe function

— Supports switching between fixed (4 corners) and arbitrary (8-bit specification of vertical and horizontal position) display positions

— The size of the display area can be either variable or 1/9 of the main picture area, i.e 1/3 of the vertical and 1/3 of the horizontal dimensions of the screen

— Horizontal resolution of about 250 dots (Y signal)

— Gradations (quantization): 64 (6 bits)

? Operating power supply voltage: 5 V ±10

? Package: QIP64E, DIP64S