Texas Instruments document SDLS137 in PDF form, 240 KB in size. Only the literature number appears in the name, so the specific logic part must be read from the first page. SDLS codes are used for TI's older 74-series TTL datasheets, which typically cover several speed families at once. The document is useful for pinouts, function tables and timing figures when testing or replacing a DIP or SOIC logic chip. Compare the package marking with the listed part numbers first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @datasheet_technar_org. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.