TEXAS INSTRUMENTS CD4020BE 芯片, 4000系列 CMOS逻辑器件
The is a CMOS 14-stage ripple-carry Binary Counter/Divider. 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 zeros state. Schmitt trigger action on the input-pulse line permits unlimited rise and fall times. All inputs and outputs are buffered.