Key facts
- Brand
- Fairchild
- Model
- 74VHC221A
- Documents
- 2
- Languages
- EN
- Last added
- 2012-01-04
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Fairchild 74VHC221A Dual Non-Retriggerable Monostable Multivibrator Datasheet
The 74VHC221A is a high‑speed CMOS dual non‑retriggerable monostable multivibrator with separate negative (A) and positive (B) trigger inputs, a clear input, and low power consumption. It is pin‑compatible with the 74HC221A and includes input protection for 0‑7 V.
Key specifications include a typical propagation delay of 8.1 ns at 5 V, supply voltage range of 2.0 V to 5.5 V, and selectable surface‑mount packages (SOIC, SOP, TSSOP). The datasheet details absolute maximum ratings, recommended operating conditions, DC/AC electrical characteristics, and mechanical dimensions.
Fairchild 74VHC221A specifications
| Typical propagation delay (tPD) | 8.1 ns at VCC = 5 V |
|---|---|
| Maximum supply current (ICC) – low power | 4 µA (Max.) at TA = 25 °C |
| Maximum supply current (ICC) – active state | 600 µA (Max.) at TA = 25 °C |
| Noise immunity | VNIH = V NIL = 28 % VCC (Min.) |
| Supply voltage (VCC) | 2.0 V to 5.5 V |
| Input voltage (VIN) | 0 V to 5.5 V |
| Output voltage (VOUT) | -0.5 V to VCC + 0.5 V |
| Package options | SOIC (M16A), SOP (M16D), TSSOP (MTC16) |
Source: Fairchild 74VHC221A Dual Non-Retriggerable Monostable Multivibrator Datasheet
All Fairchild 74VHC221A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the typical propagation delay of the 74VHC221A?
The typical propagation delay is 8.1 ns at a supply voltage of 5 V.
From: Fairchild 74VHC221A Dual Non-Retriggerable Monostable Multivibrator Datasheet
What supply voltage range does the device support?
It operates from 2.0 V up to 5.5 V.
From: Fairchild 74VHC221A Dual Non-Retriggerable Monostable Multivibrator Datasheet
What is the maximum recommended supply voltage for the 74VHC221A?
The recommended supply voltage range is 2.0 V to 5.5 V.
From: Fairchild 74VHC221A Dual Non‑Retriggerable Monostable Multivibrator Datasheet
How is the output pulse width calculated?
The output pulse width is the product of the external resistor and capacitor: PW = Rx × Cx.
From: Fairchild 74VHC221A Dual Non‑Retriggerable Monostable Multivibrator Datasheet