LC74781

The LC74781 is designed as one kind of on-screen display controller CMOS IC that displays characters and patterns on the TV screen under microprocessor control. And this device includes a built-in PDC/VPS/UDT interface circuit.

Features of the LC74781 are:(1)Video outputs: PAL and NTSC format composite video outputs;(2)On-chip sync separator circuit;(3)External control input: 8-bit serial input format;(4)Line background color: Three lines can be set up;(5)Blanking: Over the whole font (12 x 18 dots);(6)Blinking types: Two periods supported: 1.0 second and 0.5 second;(7)Blinking: Specifiable in character units;(8)Initial display positions: 64 horizontal positions and 64 vertical positions;(9)Display format: 24 characters by 12 rows (Up to 288 characters);(10)Character format: 12 (horizontal) x 18 (vertical) dots.

The absolute maximum ratings of the LC74781 can be summarized as:(1)Maximum supply voltage: VSS-0.3 to VSS+6.5 V;(2)Maximum input voltage:VSS-0.3 to VDD1+0.3 V;(3)Maximum output voltage: VSS-0.3 to VDD1+0.3 V;(4)Allowable power dissipation: 350 mW;(5)Operating temperature:30 to + 70 °C;(6)Storage temperature:40 to + 125 °C. If you want to know more information such as the electrical characteristics about the LC74781, please download the datasheet in www.seekic.com or www.chinaicmart.com .