LC74795

The LC74795 is a kind of LSI for on-screen display, a function that displays characters and patterns on a TV screen under microprocessor control. The device supports 12*18 dot characters and can display 12 lines by 24 characters of text.

There are some features of LC74795 as follows: (1)display format: 24 characters by 12 rows (up to 288 characters); (2)character format: 12 (horizontal)*18 (vertical) dots; (3)character sizes: three sizes each in the horizontal and vertical directions; (4)characters in font: 128; (5)initial display positions: 64 horizontal positions and 64 vertical positions; (6)blinking: specifiable in character units; (7)external control input: 8-bit serial input format; (8)sync separator circuit and AFC circuit; (9)PDC/VPS/UDT interface circuit that supports the I2C bus; (10)composite video output in the PAL or NTSC format.

The following is the absolute maximum ratings of LC74795: (1)maximum power supply voltage for VDD1 and VDD2 pins, VDDmax: VSS-0.3 to VSS+7.0 V; (2)input voltage for all input pins, VIN: VSS-0.3 to VSS+0.3 V ; (3)output voltage for DAV, SDA, SEPOUT and SYNCJDG pins, VOUT: VSS-0.3 to VSS+0.3 V ; (4)allowable power dissipation, Pd max: 350 mW; (5)operating temperature, Topr: -30 to +70; (6)storage temperature, Tstg: -40 to 125.