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.
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
â Display modes: 2-screen, 3-screen, and 4-screen*2
â Display on/off and frame on/off/color switching, wipe function
â Supports switching between fixed (4 corners) and arbitrary (8-bit specification of vertical and horizontal position) display positions
â 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
â Horizontal resolution of about 250 dots (Y signal)
â Gradations (quantization): 64 (6 bits)
⢠Operating power supply voltage: 5 V ±10%
⢠Package: QIP64E, DIP64S
|