Normally used on circuit boards, DIP or Dual In-Line Package features a rectangular housing. It has two parallel rows of electrical connecting pins beneath it. You can either through-hole mount these on printed circuit boards or insert into a socket. Its design originated in an attempt to improve vibration resistance, provide good heat dissipation, and also include a hermetic seal against environmental intrusion and is an improvement upon the flatpack package. The standard format allows for in-field serviceability when it appeared in 1965.An LED DIP chip typically produces around 4 lumens per LED, which is much less than newer chips offer. These were followed by SMD/SMT.