TI CD74HC393E

HC393 and HCT393 are 4-stage ripple carry binary counters. All counter stages are master-slave flip-flops. Each negative transition of the clock pulse increments the stage count by one; a high voltage level on the MR line resets all counters to zero state. All inputs and outputs are buffered.

• Fully static operation
• Buffered inputs
• Universal reset
• Negative-edge clock
• Fan-out (over temperature range):
  • Standard outputs: 10 LSTTL loads
  • Bus driver outputs: 15 LSTTL loads
• Wide operating temperature range: -55℃ to 125℃
• Balanced propagation delays and transition times
• Significantly reduced power consumption compared to LSTTL logic ICs
• HC type operating voltage: 2 V to 6 V
• High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V
• HCT type:
  • Operating voltage: 4.5 V to 5.5 V
  • Direct LSTTL input logic compatibility, VIL = 0.8V (max), VIH = 2V (min)
  • CMOS input compatibility; I1 ≤ 1μA at VOL, VOH