What does a triangle with a circle in it mean

Asked by admin @ in Computers and Technology viewed by 260 People

On the 74ls74 d flip-flop, the clk input has a small triangle. the pr (preset) and clr (clear) inputs have a circle. what do these symbols mean?

Answered by admin @


The triangle indicates that the clock signal is an edge-triggered signal.
The circle indicates that the signal is low-active (ie., inverted).
The 74LS74 has a positive-edge trigger clock (low to high).

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