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MM74C90

Fairchild
Part Number MM74C90
Manufacturer Fairchild
Description 4-Bit Decade Counter 4-Bit Binary Counter
Published May 9, 2005
Detailed Description MM74C90 • MM74C93 4-Bit Decade Counter • 4-Bit Binary Counter October 1987 Revised January 1999 MM74C90 • MM74C93 4-Bi...
Datasheet PDF File MM74C90 PDF File

MM74C90
MM74C90

Overview
MM74C90 • MM74C93 4-Bit Decade Counter • 4-Bit Binary Counter October 1987 Revised January 1999 MM74C90 • MM74C93 4-Bit Decade Counter • 4-Bit Binary Counter General Description The MM74C90 decade counter and the 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 s Wide supply voltage range: s Guaranteed noise margin: s High ...


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