This is the one of the decade Counter (Divided by 10 Counter). It is a 5 Stage Divide by 10 Johnson Counter with 10 Decoded outputs. It has a wide supply voltage range from 3V to 15V and is compatible with TTL. It has a medium speed of operation, typically 5Mhz. Its applications includes industrial electronics, remote metering, automotive, medical electronics, instrumentation and alarm systems.
The VCC is the supply voltage terminal of the IC. Being a CMOS IC it has a wide supply voltage range from 3V to 15V
The VSS is the ground pin or common pin of the IC CD4017. It should be connected to the negative terminal of the DC Power supply or battery