Description
The Harris CD74HC393 and CD74HCT393 are 4-stage ripple-carry binary counters. Al counter stages are master slave flip-flops. The state of the stage advances one count on the negative transition of each clock pulse; a high voltage level on the MR line resets all counters to their zero state. All inputs and outputs are buffered.

FEATUREs
• 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^oC to 125^oC
• 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