Figure 1-30A.DIP and flat-pack lead numbering. DIP
Figure 1-30B.DIP and flat-pack lead numbering. Flat-Pack
The TO-5 can has a tab for the reference mark. When numbering the leads, you must view the TO-5
can from the bottom. Pin 1 will be the first pin in a clockwise direction from the tab. All other pins will be
numbered consecutively in a clockwise direction from pin 1, as shown in figure 1-31.