LC74763

The LC74763 and LC74763M are on-screen display CMOS LSIs that superimpose text and low-level graphics onto a TV screen (video signal) under the control of a microcontroller. The display characters have a 12 by 18 dots structure, and 128 characters are provided.

The features of LC74763 can be summarized as (1)display structure: 12 lines by 24 characters (up to 288 characters); (2)maximum character display: up to 288 characters; (3)character configuration: 12 by 18 dots structure; (4)number of characters: 128 characters (128 plus space 2 fonts); (5)character sizes: three sizes (normal, double, and triple sizes); (6)display starting positions: 64 horizontal and 64 vertical locations; (7)reverse video function: characters can be inverted on a per character basis.; (8)flashing types: two types with periods of 0.5 and 1.0 second on a per character basis (duty fixed at 50%); (9)background color: one of eight colors (when internal synchronization used); (10)external control input: serial data input in 8-bit units; (11)built-in horizontal/vertical sync separation circuit, AFC circuit, and synchronization detector; (12)video output: composite video signal output in NTSC, PAL, PAL-M, PAL-N, PAL60, NTS C4.43, or SECAM format.

The absolute maximum ratings of LC74763 are (1)maximum supply voltage VDD max(VDD1, VDD2 pins): VSS-0.3 to +7.0V; (2)maximum output voltage VOUTmax: VSS-0.3to VDD +0.3V; (3)maximum input voltage VIN max(all input pins): VSS-0.3 to +0.3V; (4)operating temperature Topr: -30 to 70°C; (5)storage temperature Tstg: -40 to +125°C.