Data sheet acquired from Harris Semiconductor SCHS.
CD4011UB - CMOS NAND Gates
CD4011UBM - CMOS Quad 2-Input NAND Gate
CD4011UBF - CMOS Quad 2-Input NAND Gate
CD4011UBE - CMOS Quad 2-Input NAND Gate
CD4011UB - CMOS Quad 2-Input NAND Gate