← All parts
74HC123 Dual Monostable
74HC123
Nexperiaic logic
The 74HC123 is a dual retriggerable monostable multivibrator with reset, used for generating output pulses of programmable width based on external timing components.
In stock
Specifications
3- Operating Voltage
- 2.0 V to 6.0 V
- Supply Current
- 50 mA max
- Temperature Range
- -40 °C to +125 °C
Pinout
16Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.
| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | VCC | POWER | Supply voltage |
| 2 | nB | GPIO | Negative-edge triggered input 2 |
| 3 | 1RD | GPIO | Direct reset LOW and positive-edge triggered input 1 |
| 4 | 1Q | GPIO | Active LOW output 1 |
| 5 | 2Q | GPIO | Active HIGH output 2 |
| 6 | 1CEXT | GPIO | External capacitor connection 1 |
| 7 | 1REXT/CEXT | GPIO | External resistor and capacitor connection 1 |
| 8 | GND | GND | Ground (0 V) |
| 9 | 2A | GPIO | Negative-edge triggered input 1 |
| 10 | 2B | GPIO | Positive-edge triggered input 2 |
| 11 | 2RD | GPIO | Direct reset LOW and positive-edge triggered input 2 |
| 12 | 2Q | GPIO | Active LOW output 2 |
| 13 | 1Q | GPIO | Active HIGH output 1 |
| 14 | 1CEXT | GPIO | External capacitor connection 2 |
| 15 | 2REXT/CEXT | GPIO | External resistor and capacitor connection 2 |
| 16 | VCC | POWER | Supply voltage (repeated) |
Interactive pinout
Highlight:
74HC123
Click a pin to copy its name · tap a tag above to spotlight a bus.