Description: CD4017 Johnson Counter
Theis used for counting applications, it has the capability to turn on 10 outputs sequentially in a pre-defined time and reset the count or hold it when required. It also has the capability to indicate the status of counting using Carry pin. This is commonly used for Led chasers and other logical output projects, so if you are looking for an sequential decoded counting IC that can count up to 10 then this IC will be your right choice
CD4017 PinConfiguration
Pin Number | Pin Name | Description |
1 to 7 and 9,10,11 | Output pins Q0 to Q9 | These are the 10 output pins on which the counting occurs, they are not in order hence verify pin diagram above |
8 | Vss or Ground | Connected to the Ground of the circuit |
12 | Carry Out (CO) | This pin goes high after the IC counts from 1 to 10. This is used as carry while counting. |
13 | Clock Enable (EN) | This is an input which when made high will hold the count at the current state |
14 | Clock | The counting happens when this clock pulse goes high , this pin is normally connected toor other uC to produce a pulse |
15 | Resets | As the name suggests this pin resets the count back to 1 |
16 | Vdd / Vcc | Connects to the supply voltage typically +5V |
Features
- High speed 16 pin CMOS Decade counter
- Supports 10 decoded outputs
- Wide supply voltage range from 3V to 15V, typically +5V
- TTL compatible
- Maximum Clock Frequency: 5.5Mhz
- Available in 16-pin PDIP, GDIP, PDSO packages
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