The TVP3026 64-bit RAMDAC (Random Access Memory Digital to Analog Converter) reduces graphics system VRAM requirements with a packed pixel capability. You can now create a 1280 by 1024 resolution, 24-bit "true color", display with only 4 Mb of VRAM. This establishes a new performance standard that would previously have required 6-8 Mb of VRAM to implement.
The TVP3026 is a single chip graphics system back-end that integrates triple 8-bit video DAC's, and three 256 by 8 color lookup tables and implements all the interface functions required by the graphics controller and VRAM.
The device supports speeds up to 220 MHz for 1600 x 1280 high-refresh applications with the ability to display 16-bit true color (65,536 colors). At 1280 x 1024 resolution, the device supports 24-bit true color with 16.7 million colors. Pixel bus data can be split into 1, 2, 4 or 8-bit planes for pseudo color codes, or split into 12, 16, or 24-bit true color for direct color modes.
Two fully programmable frequency synthesizers and an internal Phase Locked Loop (PLL) provide additional system integration. This reduces external component count and simplifies graphics system design. Phase-locking the graphics controller and RAMDAC clocks ensures proper timing control, allowing maximum VRAM bandwidth and screen refresh rates.
The TVP3026 also supports an industry compatible register interface, allowing easy upgrades from existing 32-bit systems. It was developed to be compatible with most industry standard graphics controllers, including S3's Vision968™, Matrox MGAII™ and ATI mach64™ accelerators.
The TVP3026 is now available in a 160-pin quad flat (PCE) package from Texas Instruments and our authorized distributors.
Vol 11, Spring, 1995