Orderable parts
Type number | Orderable part number | Ordering code (12NC) | Package | Buy from distributors |
---|---|---|---|---|
74HCT221D | 74HCT221D,118 | 933715110118 | SOT109-1 | Order product |
Discover Nexperia’s extensive portfolio of diodes, bipolar transistors, ESD protection devices, MOSFETs, GaN FETs, IGBTs, and analog & logic ICs. Our components power virtually every electronic design worldwide - from automotive and industrial to mobile and consumer applications.
Our products find applications across various industries, from automotive and industrial to power, computing, consumer, mobile, and wearables. With a commitment to innovation and sustainability, our components set benchmarks in efficiency, empowering our global customer base to develop energy-efficient and cutting-edge solutions.
Try out our devices and their performance with our comprehensive range of evaluation boards. Gain a deeper understanding of how our products can benefit your application, whether it's optimizing for efficiency, robustness, or reliability. You can find Application focus, Package focus, and different Nexperia Product focus boards here.
Register once, drag and drop ECAD models into your CAD tool and speed up your design.
Click here for more informationDual non-retriggerable monostable multivibrator with reset
The 74HCT221 is a dual non-retriggerable monostable multivibrator. Each multivibrator features edge-triggered inputs (nA and nB), either of which can be used as an enable input. Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. Schmitt-trigger input circuitry for the nB inputs allow jitter-free triggering from inputs with slow transition rates, providing the circuit with excellent noise immunity. Once triggered, the outputs (nQ, nQ) are independent of further transitions of nA and nB inputs. The output pulse width is defined by the following relationship:
The output pulses can be terminated by the active LOW reset inputs (nRD). Pulse width stability is achieved through internal compensation and is virtually independent of VCC and temperature. In most applications pulse stability will only be limited by the accuracy of the external timing components . This device features reduced input threshold levels to allow interfacing to TTL logic levels. Inputs also include clamp diodes, this enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Supply voltage range from 4.5 V to 5.5 V
CMOS low power dissipation
High noise immunity
Input levels:
For 74HCT221: TTL level
Pulse width variance is typically less than ±5%
Direct reset terminates output pulse
Schmitt-trigger action on nB inputs
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Package name |
---|---|---|---|---|---|---|---|
74HCT221D | 4.5 - 5.5 | TTL | ± 4 | 32 | low | -40~125 | SO16 |
Model Name | Description |
---|---|
|
Type number | Orderable part number, (Ordering code (12NC)) | Status | Marking | Package | Package information | Reflow-/Wave soldering | Packing |
---|---|---|---|---|---|---|---|
74HCT221D | 74HCT221D,118 (933715110118) |
Active | 74HCT221D |
SO16 (SOT109-1) |
SOT109-1 |
SO-SOJ-REFLOW
SO-SOJ-WAVE WAVE_BG-BD-1 |
SOT109-1_118 |
Type number | Orderable part number | Chemical content | RoHS | RHF-indicator |
---|---|---|---|---|
74HCT221D | 74HCT221D,118 | 74HCT221D |
File name | Title | Type | Date |
---|---|---|---|
74HCT221 | Dual non-retriggerable monostable multivibrator with reset | Data sheet | 2024-04-04 |
AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
SOT109-1 | 3D model for products with SOT109-1 package | Design support | 2020-01-22 |
Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
SO16_SOT109-1_mk | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm body | Marcom graphics | 2017-01-28 |
SOT109-1 | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body | Package information | 2023-11-07 |
SOT109-1_118 | SO16; Reel pack for SMD, 13"; Q1/T1 product orientation | Packing information | 2024-02-19 |
74HCT221D_Nexperia_Product_Reliability | 74HCT221D Nexperia Product Reliability | Quality document | 2024-06-16 |
SO-SOJ-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
HCT_USER_GUIDE | HC/T User Guide | User manual | 1997-10-31 |
SO-SOJ-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
WAVE_BG-BD-1 | Wave soldering profile | Wave soldering | 2021-09-08 |
If you are in need of design/technical support, let us know and fill in the answer form we'll get back to you shortly.
File name | Title | Type | Date |
---|---|---|---|
SOT109-1 | 3D model for products with SOT109-1 package | Design support | 2020-01-22 |
Model Name | Description |
---|---|
|
Type number | Orderable part number | Ordering code (12NC) | Status | Packing | Packing Quantity | Buy online |
---|---|---|---|---|---|---|
74HCT221D | 74HCT221D,118 | 933715110118 | Active | SOT109-1_118 | 2,500 | Order product |
As a Nexperia customer you can order samples via our sales organization.
If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples. Check out the list of official distributors.
The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.