74LS221 Dual Non-Retriggerable One-Shot Multivibrator with Reset
Prices updated: 13 Oct 2026
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| Store | product | Price | View in store |
|---|---|---|---|
 Makers Electronics | 74LS221 IC-Dual Non-Retrigger able-Monostable Multivibrator With Reset | 30 EGP | View in store |
Price history
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Lowest price recorded: 30 EGP
About this product
The 74LS221 contains two independent non-retriggerable monostable multivibrators (one-shots) with a clear input. Each generates a fixed output pulse set by an external resistor and capacitor, using tw ≈ 0.7 × Rext × Cext. It is used for pulse stretching, timing delays and switch debouncing in TTL circuits.
Specifications
- Logic family
- LS-TTL
- Channels
- 2 (dual)
- Pulse width formula
- tw ≈ 0.7 × Rext × Cext
- Reset input
- CLR (active low)
- Package
- DIP-16
Frequently asked questions
What is the price of 74LS221 Dual Non-Retriggerable One-Shot Multivibrator with Reset in Egypt?
74LS221 Dual Non-Retriggerable One-Shot Multivibrator with Reset currently costs 30 EGP in Egypt.
Where can I buy 74LS221 Dual Non-Retriggerable One-Shot Multivibrator with Reset in Egypt?
74LS221 Dual Non-Retriggerable One-Shot Multivibrator with Reset is available from Makers Electronics. Compare the offers above to find the best price.
How do I set the output pulse width?
Choose external Rext and Cext values within the datasheet limits and apply tw ≈ 0.7 × Rext × Cext. For example, 10 kΩ and 10 µF give a pulse of roughly 70 ms.
How should I handle the CLR pin?
CLR is active low and resets the output when pulled low. Tie it high through a resistor when you are not resetting, and do not leave it floating, because noise can trigger unwanted resets.
