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This page is to be a compendium of technical details on various 4000-series integrated circuits, for quick reference.
See the [Texas Instruments CD4017B datasheet](https://www.ti.com/lit/ds/symlink/cd4022b.pdf)
The 4017 is a decade counter with 10 individual outputs.
+---u---+
5 -|1 16|- V'DD
1 -|2 15|- RESET
0 -|3 14|- CLK
2 -|4 13|- ~CE
6 -|5 12|- CARRY
7 -|6 11|- 9
3 -|7 10|- 4
V'SS -|8 9|- 8
+-------+
V'SS: Ground
CARRY: Carry out
~CE: Clock inhibit
CLK: Clock
RESET: Reset
V'DD: Supply voltage
The device starts with all output pins low, other than output pin `0` (physical pin 3), which is high. If `~CE` is low, each transition of `CLOCK` from low to high will bring the active output pin low and bring high the next output pin in the sequence.
The `CARRY` pin is high when the active output is `0`/`1`/`2`/`3`/`4`, and is low when the active output is `5`/`6`/`7`/`8`/`9`. This has the effect that `CARRY` will transition from low to high when the output rolls over from `9` to `0`, and so can be chained to the `CLOCK` pin on a separate device.
Transitioning the `RESET` pin from low to high will bring the active output pin low and bring output pin `0` high.
<<<table>>>
<<<table>>>
*Note: There is no maximum clock transition duration if pin 14 is used for the clock input, as this pin has a Schmitt trigger input.