A 76-MHz BiCMOS programmable logic sequencer

A BiCMOS programmable logic sequencer with a maximum operating frequency of 76 MHz at a power dissipation of 370 mW has been developed. The device is organized as 16 inputs, 48 product terms, and eight registered outputs. The excellent speed power performance and TTL/CMOS compatibility were realized by an optimized circuit design coupled with an advanced BiCMOS process. The process features 13-GHz bipolar transistors, 1- mu m CMOS, TiW fuses, poly resistors, three-layer metal, and single-layer polycide. Bipolar devices are used in areas that utilize their strengths such as high current drivers, small-signal sensing, and precise current sources. CMOS is used in other areas to conserve layout size and power.<
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