# Logic IC SOIC Texas Instruments CD74HC221MT — dual one-shot, package SOIC, size 10×4×1.5 mm, pack of 250

**URL:** https://aio.lv/en/product--yenkee-98038635--11867970
**Data updated:** 2026-03-09 17:45 (EET)
**Category:** Mouses
**Manufacturer:** YENKEE
**Manufacturer code:** 98038635
**EAN:** 2050002154322
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.99 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 19.00 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--yenkee-98038635--11867970

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Texas Instruments CD74HC221MT is a logic IC in an SOIC package, supplied in a pack of 250. The device implements dual one-shot (monostable) pulse generators suitable for timing and pulse-shaping applications. Physical dimensions are approximately 10 mm × 4 mm × 1.5 mm. Use in digital timing, debounce, and pulse-width control circuits.

## Long description

Texas Instruments CD74HC221MT is a dual one-shot (monostable) logic IC in an SOIC package supplied in a pack of 250. The device provides two independent monostable pulse generators with separate reset inputs and buffered Q and Q outputs. External resistor (RX) and capacitor (CX) determine the output pulse width; the standard timing approximation is tW = 0.7·RX·CX at VCC = 4.5 V. The IC features both trailing-edge (A) and leading-edge (B) triggering, a Schmitt trigger on the B inputs for improved noise immunity, and is suitable for timing, pulse shaping, debounce, and pulse-width control in digital circuits. Physical package dimensions are approximately 10 × 4 × 1.5 mm.
Advantages
The CD74HC221MT offers independent dual monostable channels with the ability to terminate an output pulse via an overriding reset, allowing reliable interrupt or restart behavior. Triggering on either edge and buffered complementary outputs support flexible interfacing with other logic families. Low power consumption compared with older LSTTL parts and broad operating voltage range for HC types enhance compatibility across a range of designs. The device’s Schmitt-triggered inputs on B improve stability when working with slow or noisy signals.
Suitable for
Timing and delay generation in digital circuits
Debounce circuits for mechanical switches and buttons
Pulse-width control and pulse shaping for sensors and actuators
Generating one-shot triggers for sequencers and state machines
Edge-detection and transient pulse conditioning
Key specifications
Function: Dual monostable (one-shot) pulse generators with reset
Package: SOIC surface-mount package, approximate dimensions 10 × 4 × 1.5 mm
Channel count: 2 independent monostable circuits
Timing control: External resistor RX and capacitor CX; typical pulse width tW = 0.7·RX·CX at VCC = 4.5 V
Triggering: Trailing-edge (A) and leading-edge (B) inputs; B input includes Schmitt trigger
Outputs: Buffered Q and Q complementary outputs per channel
Reset: Separate active-low reset inputs to terminate pulse
Operating voltage (HC types): 2 V to 6 V; tolerant design for common logic levels
Operating temperature range: wide commercial and industrial range (device specified for –55°C to 125°C in manufacturer documentation)
How to use
Install the CD74HC221MT in the circuit following standard SOIC surface-mount practices or use an appropriate adapter for prototyping. Define the desired pulse width by selecting RX and CX values and connect them to the appropriate timing pins; ensure RX is at or above the recommended minimum (typical minimum RX ≈ 500 Ω) and CX is chosen to achieve the required tW = 0.7·RX·CX. Apply logic-level triggers to the A or B input depending on whether trailing- or leading-edge triggering is required. Use the reset input to terminate a pulse early by driving it low. If a channel is unused, terminate its inputs to a defined logic level (high or low) to avoid floating inputs.
Usage recommendations
For stable timing, place the RX resistor and CX capacitor close to the IC timing pins and avoid long traces; use decoupling capacitors on VCC near the device. Verify timing across the intended supply voltage and temperature range, and when interfacing with TTL or CMOS logic families, choose supply and input levels accordingly to ensure reliable triggering and output interpretation.

## Specifications

| Feature | Value |
|---|---|
| Number of pins | 16 |
| Width (with pins) | 10 mm |
| Depth (with pins) | 6.2 mm |
| Height (with pins) | 1.75 mm |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 1.5 mm |
| Width | 10 mm |
| Depth | 4 mm |

### Packaging data

| Feature | Value |
|---|---|
| Package type | SOIC |
| Quantity per pack | 250 pc(s) |

### Operational conditions

| Feature | Value |
|---|---|
| Storage temperature (T-T) | -65 - 150 |
| Operating temperature (T-T) | -55 - 125 |

### Other features

| Feature | Value |
|---|---|
| Type | Logic IC |

## FAQ

### How much does the Texas Instruments CD74HC221MT SOIC Logic IC cost, and is it available for purchase?

The price is 22.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 185 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All YENKEE products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized YENKEE service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Texas Instruments CD74HC221MT SOIC Logic IC?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

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