TS 664

TS 664 is the Turkish edition of a standard that organizes letter symbols used in the field of semiconductor devices and integrated microcircuits. Its value lies in creating a common notation for drawings, diagrams and technical documentation, so the same electrical concepts can be identified consistently across organizations and publications. The subject is therefore the coding language itself, rather than the detailed performance of individual components.

In general technical terms, semiconductors include a wide family of components such as diodes, transistors, thyristors and integrated circuits. Letter symbols provide a compact way to show device type, function or role in a circuit. This makes schematic diagrams easier to read, helps parts lists stay consistent, and reduces ambiguity when different engineers, manufacturers or documentation systems refer to the same component class.

Why uniform notation matters

The standard covers a uniform system of letter symbols for semiconductor devices and integrated microcircuits. In practice, such a system supports design, production, maintenance and technical communication by making sure that a given symbol carries the same meaning wherever it appears. For electronics documentation, that consistency is especially important because even small differences in notation can lead to confusion when interpreting schematics, catalogues or specification sheets.

TS 664 was published as an equivalent of IEC 148-A and is now withdrawn. As a result, it is mainly of interest for understanding the historical notation framework used in semiconductor and microcircuit documentation, while current marking or symbol systems may be governed by later standards.

• Covers a common system of letter symbols for semiconductor devices.
• Also addresses notation used for integrated microcircuits.
• Supports consistent interpretation of circuit diagrams and technical records.
• Published as an equivalent of IEC 148-A.
• The document is withdrawn.