Bt457 Overview
Bt451 Bt457 125 MHz/135 MHz/165 MHz Monolithic CMOS 256 Color Palette RAMDAC Bt458 The Bt457 and Bt458 are pin and software-patible RAMDACs designed specifically for high-performance, high-resolution color graphics. The architecture enables the display of 1280 x 1024 bit-mapped color graphics (up to 8 bits per pixel plus up to 2 bits of overlay information), minimizing the use of costly ECL interfacing, as most of...
Bt457 Key Features
- 165, 135, 125, 110, 80 MHz operation
- 4:1 or 5:1 input mux
- 256-word dual-port color palette
- Four dual-port overlay registers
- RS-343A-patible outputs
- Bit plane read and blink masks
- Standard MPU interface
- 84-pin PLCC or PGA package
- +5 V CMOS monolithic
