The MM74C90 by National Semiconductor is a 4-Bit Decade Counter. Below is the official datasheet preview.
| Part number | MM74C90, MM74C93 |
|---|---|
| Manufacturer | National Semiconductor |
| File Size | 124.19 KB |
| Description | 4-Bit Decade Counter |
| Datasheet |
 MM74C93_NationalSemiconductor.pdf
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| Note |
This datasheet PDF includes multiple part numbers: MM74C90, MM74C93. Please refer to the document for exact specifications by model. |
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The MM54C90 MM74C90 decade counter and the MM54C93 MM74C93 binary counter and complementary MOS (CMOS) integrated circuits constructed with N- and P-channel enhancement mode transistors The 4-bit decade counter can reset to zero or preset to nine by applying appropriate logic level on the R01 R02 R91 and R92 inputs Also a separate flip-flop on the A-bit enables the user to operate it as a divide-by-2 5 or 10 frequency counter The 4-bit binary counter can be reset to zero by applying high logic l
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