CD74HC4020 Datasheet PDF - TI

The ’HC4020 and ’HCT4020 are 14-stage ripple-carry binary counters. All counter stages are master-slave flip-flops. The state of the stage advances one count on the negative clock transition of each input pulse; a high voltage level on the MR line resets all counters to their zero state. All inputs and outputs are buffered.

● Fully Static Operation

● Buffered Inputs

● Common Reset

● Negative Edge Clocking

● Fanout (Over Temperature Range)

● Standard Outputs...10 LSTTL Loads

● Bus Driver Outputs...15 LSTTL Loads

● Wide Operating Temperature Range... -55°C to 125°C

● Balanced Propagation Delay and Transition Times

● Significant Power Reduction Compared to LSTTL Logic ICs

● HC Types

● 2V to 6V Operation

● High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V

● HCT Types

● 4.5V to 5.5V Operation

● Direct LSTTL Input Logic Compatibility, VIL = 0.8V (Max), VIH = 2V (Min)

● CMOS Input Compatibility, Il 1µA at VOL, VOH