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- DC triggered from active high or active low inputs
- Retriggerable for very long pulses up to 100% duty factor
- Direct reset terminates output pulse
- Schmitt-trigger action on all inputs except for reset input
- ±1.0µA Input leakage current
- 160µA Supply current
Dual Retriggerable Monostable Multivibrator IC - 74HC123
The 74HC Series 74HC123 is a 16 Pin Dual Retriggerable Monostable Multivibrator IC having 4.75V to 5.25V Operating Voltage with an output current of 8mA. It can generate output pulses from a few nano-seconds to extremely long duration up to 100% duty cycle. It contains internal timing resistors that allow the circuits to be used with only an external capacitor.
The 74HC123 contains two independent monostable multivibrators, each with two inputs and two outputs. When triggered, the output of the multivibrator goes high for a fixed period of time, after which it returns to its original state. The duration of the output pulse is determined by the values of an external resistor and capacitor connected to the IC.
check out : CD4538 - Dual Precision Monostable Multivibrator IC
Pinout:
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Shipping & Returns
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Package Includes:
- 1 x IC - 74HC123
Specifications:
| Package Type | DIP |
| Multivibrator Type | Retriggerable Monostable |
| Voltage Rating | 4.75 to 5.25V |
| Current Rating | 8mA Output Current |
| Temperature Rating | 0 to 70 Deg C |
| Number of Pins | 16 |
| Propagation Delay | 23ns |
1.What is a monostable multivibrator used for?
- It is used in timing and delay circuits. It is responsible for the generation of clock pulses. Its purpose is to regenerate distorted waves. It is also used in analogue systems to control the frequency of an output signal.
2.How does the 74HC123 IC respond to input trigger signals?
- The 74HC123 IC generates a pulse of a specified width at its output in response to positive or negative transitions on either of its two input trigger pins (T1 and T2) (Q). The width of the output pulse is determined by the timing resistor and capacitor values, and the pulse can be retriggered by subsequent input trigger signals before it ends.
