The CD4020B is a 14-stage ripple carry binary counter. All counter stages are master-slave flip flops.The state of a counter advances one count on the negative transition of each input pulse.A high level on the RESET line Resets the counter to its all zero state.
Specification:
DC Supply Voltage Range:-0.5V to+20V
Input Voltage Range,all inputs: -0.5V to VDD+0.5V
DC input Current,any input:±10mA