Dual in-line package (DIP) pin-numbering convention: Evaluate the rule-of-thumb: “If you place the notch to your right, pin 1 will always be in the lower-right corner.” Clarify correct DIP orientation and numbering.

Introduction / Context:DIP (dual in-line package) integrated circuits use a standardized pin-numbering scheme. Knowing where pin 1 is helps prevent reversed installation, board damage, and miswiring. The prompt suggests a rule-of-thumb that placing the notch to the right puts pin 1 at the lower-right corner. This statement is widely contrary to standard orientation and therefore must be evaluated critically.

Given Data / Assumptions:

• Standard DIP viewed from the top (markings facing you).
• A notch or a dot indicates the pin-1 end.
• Numbering proceeds counterclockwise around the package when viewed from the top.

Concept / Approach:With the notch at the top, pin 1 is the top-left lead, and numbers increase down the left side, across the bottom, and back up the right side to the top-right for the highest pin number. Rotating the package changes which physical corner appears “lower-right,” but pin-1 location is always determined by the notch/dot and the counterclockwise sequence, not by a “notch-right means lower-right” shortcut.

Step-by-Step Solution:

Verification / Alternative check:Most datasheets show the counterclockwise top-view numbering and mark pin 1 with a dot or notch. This universal convention supersedes ad-hoc mnemonics.

Why Other Options Are Wrong:

Common Pitfalls:Using board orientation rather than package markings; ignoring the dot near pin 1; confusing top-view with bottom-view diagrams.

Final Answer:Incorrect