Before revision: CD4504B , 6-bit unidirectional, dual-supply of 5V TTL or 5V-18V CMOS translated to 5V-18V CMOS, available in DIP or SMD packages.
After revision: 4504B , 6-bit unidirectional, dual-supply of 5V TTL or 5V-18V CMOS translated to 5V-18V CMOS, available in DIP or SMD packages.