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  1. Technology
November 5, 1991


By CBR Staff Writer

AT&T has a new 0.9-micron CMOS graphics chip set that consists of four RAMDACs – digital to analogue converters – a Super VGA controller and a clock synthesiser with a power-down feature, and a 16-bit design would comprise nine components: the RAMDACs – ATT20C475A, 476A, 477A, 478A – convert six or eight bits of information into an analogue output displaying up to 16m colours; each RAMDAC is available at 66MHz, 80MHz, 100MHz or 110MHz; typical power consumption is 500mW, the Super VGA controller manipulates data to the monitor at 72MHz and supports a 70Hz video-display refresh at 1,024 by 768 resolution; samples are available now and full production begins in the fourth quarter; in quantities of 1,000 the 44-pin ATT20C478A and ATT20C477A are $7.20, the ATT20C476A is $5.40 and the ATT20C475A costs $6.45; the 132-pin ATT20C100 is $15.00 and the 20-pin DIP ATT20C200 costs $4.10.

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