Texas Instruments CD74HC4040/CD74HCT4040 12-Stage Binary Counters

Texas Instruments CD74HC4040/CD74HCT4040 12-Stage Binary Counters are high-speed counter stages that are controller 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 a zero state. All inputs and outputs of the Texas Instruments CD74HC4040/CD74HCT4040 are buffered.

Features

  • Fully static operation
  • Buffered inputs
  • Common reset
  • Negative edge pulsing
  • Fanout (over temperature range)
    • Standard outputs: 10 LSTTL loads
    • Bus driver outputs: 15 LSTTL loads
  • Wide operating temperature range of -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% 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, II ≤ 1μA at VOL, VOH

Applications

  • Frequency division
  • Timing circuits
  • Digital logic systems

Functional Block Diagram

Texas Instruments CD74HC4040/CD74HCT4040 12-Stage Binary Counters
Đã phát hành: 2025-05-12 | Đã cập nhật: 2025-05-20