74HC74 - Dual D-type Positive Edge-triggered Flip-Flops IC
The 74HC Series 74HC74 device contains two independent positive-edge-triggered D flip-flops with complementary outputs. The information on the D input is accepted by the flip-flops on the positive-going edge of the clock pulse. The triggering occurs at a voltage level and is not directly related to the transition time of the rising edge of the clock.
The data on the D input may be changed while the clock is LOW or HIGH without affecting the outputs as long as the data setup and hold times are not violated. A low logic level on the preset or clear inputs will set or reset the outputs regardless of the logic levels of the other inputs.
Pinout:
Pinout Of 74HC74 IC
| Input (1D, 2D) |
2, 12 |
| Inverting Output (1Q', 2Q') |
6, 8 |
| Non-Inverting (1Q, 2Q) |
5, 9 |
| Clock (1CLK, 2CLK) |
3, 11 |
| Enable Pin (ENP, ENT) |
4, 10 |
| RESET (R') |
1,13 |
| Power Supply (VCC)
|
14 |
| Ground (GND) |
7 |
Application:
- Ultrasound System
- Fans
- Lab Instrumentation
- Vacuum Cleaners
- Video Communications System
- IP Phone: Wired