74AHC1G4212 12-stage divider and oscillator Rev.
5 — 13 January 2022 Product data sheet 1.
General description 74AHC1G4212 is a 12-stage divider and oscillator.
It consists of a chain of 12 flip-flops.
Each flip-flop divides the frequency of the previous flip-flop by two, consequently the 74AHC1G4212 counts up to 212 = 4096.
The single inverting stage (X1 to X2) functions as a crystal oscillator or an input buffer for an external oscillator.
When used as a buffer the output X2 should be left floating.
The frequency of the output (Q) is the frequency applied to X1 divided by 4096.
The divider advances on the negative-going transition of X1.
The X1 input is overvoltage tolerant.
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