High Speed CMOS Logic Dual 4 -Stage Binary Counter
Description
The 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 . . . -55oC to 125oC
• 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