What this 44-PLCC RAM-DAC does on your board
The ADV478KP80 is a 256 x 24 color palette RAM-DAC — three 6-bit or 8-bit DACs in one package, pipelined architecture, with a typical settling time of 13 ns.
Package, rework, and board-fit
Housed in a 44-lead PLCC with J-leads (44-LCC), the supplier device package is 44-PLCC measuring 16.59 x 16.59 mm — a square body that sits in a socket or solders direct to the board. The J-lead profile gives you a bit of compliance during thermal cycling, and the PLCC body is easier to hand-rework than a fine-pitch QFP — hot air lifts the part without lifting the pad, provided you preheat the board to 100 °C or so. Surface-mount only; the bulk packaging means you get tubes or trays, not a reel, so plan for manual or tube-fed placement.
Linearity and settling — what the numbers mean
INL and DNL are both ±1 LSB max — the DAC output lands within one least-significant bit of the ideal value at every code, and no missing codes at the 6- or 8-bit resolution. The 13 ns typical settling time means the output settles to within 0.5 LSB in that window — fast enough for pixel-clock rates in the 50–80 MHz range typical of VGA-class video paths.