4000 series cmos logic family texas instruments cd4041ube this texas instruments cd4041u quad true complement buffer ic is available in a dil 14 package a part of the cmos 4000 range these are quad true complement buffers consisting of n and p channel units having low channel resistance and high current capability applications include high current sourcesink driver cmos to ttl converter display driver mos clock driver resistor network driver ladder or weighted r or transmission