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MM74C90

National Semiconductor
Part Number MM74C90
Manufacturer National Semiconductor
Description 4-Bit Decade Counter
Published Nov 24, 2017
Detailed Description MM54C90 MM74C90 4-Bit Decade Counter MM54C93 MM74C93 4-Bit Binary Counter February 1988 MM54C90 MM74C90 4-Bit Decade C...
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MM74C90
MM74C90

Overview
MM54C90 MM74C90 4-Bit Decade Counter MM54C93 MM74C93 4-Bit Binary Counter February 1988 MM54C90 MM74C90 4-Bit Decade Counter MM54C93 MM74C93 4-Bit Binary Counter General Description 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 level on inputs R01 and R02 and a separate flip-flop on the A-bit enables the user to operate it as a divide-by-2 -8 or -16 divider Counting occurs on the negative going edge of the input pulse All inputs are protected against static discharge damage Features Y Wide supply voltage range Y Guaranteed noise margin ...


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