Texas Instruments

SN74LS221NSR  

Multivibrators

SN74LS221NSR Description

The SN74LS221NSR is a high-performance monostable multivibrator integrated circuit (IC) designed for a wide range of timing and pulse generation applications. Manufactured by Texas Instruments, this IC is part of the renowned 74LS series, known for its reliability and versatility in digital circuits. The SN74LS221NSR features two independent monostable circuits, making it ideal for applications requiring precise timing control and pulse shaping.

SN74LS221NSR Features

• Operating Temperature: The SN74LS221NSR operates within a temperature range of 0°C to 70°C, ensuring stable performance in typical industrial and commercial environments.
• Propagation Delay: With a propagation delay of 45 nanoseconds, this IC offers rapid response times, making it suitable for high-speed digital circuits.
• Logic Type: The monostable logic type allows for single-pulse generation, which is essential for timing and synchronization tasks.
• Independent Circuits: The inclusion of two independent monostable circuits provides flexibility in designing complex timing systems.
• Mounting Type: The surface mount package (16SO) ensures easy integration into modern PCB designs, facilitating compact and efficient circuit layouts.
• Voltage - Supply: The IC operates within a supply voltage range of 4.75 V to 5.25 V, ensuring compatibility with standard 5V digital systems.
• Current - Output High, Low: The SN74LS221NSR can source 400µA and sink 8mA, providing robust output capabilities for driving various loads.
• Moisture Sensitivity Level (MSL): With an MSL of 1 (Unlimited), the IC is highly resistant to moisture, enhancing its reliability in humid conditions.
• Compliance: The SN74LS221NSR is REACH Unaffected and ROHS3 Compliant, ensuring it meets stringent environmental and safety standards.
• Packaging: Available in Tape & Reel (TR) packaging, it is suitable for automated assembly processes, reducing production costs and improving efficiency.

SN74LS221NSR Applications

The SN74LS221NSR is ideal for a variety of applications where precise timing and pulse generation are critical. Some specific use cases include:

• Digital Timing Circuits: The monostable circuits can generate precise timing pulses for synchronizing digital systems.
• Pulse Shaping: The IC can be used to shape and condition pulses for reliable signal transmission.
• Noise Filtering: The absence of Schmitt trigger inputs ensures that the IC can be used in applications where noise filtering is not required, simplifying circuit design.
• Sequential Logic: The independent monostable circuits enable the creation of complex sequential logic systems, enhancing the functionality of digital circuits.
• Communication Systems: The rapid response time and reliable performance make it suitable for timing and synchronization in communication systems.

Conclusion of SN74LS221NSR

The SN74LS221NSR is a versatile and reliable monostable multivibrator IC that offers significant advantages over similar models. Its high-speed performance, dual independent circuits, and robust output capabilities make it an ideal choice for a wide range of digital timing and pulse generation applications. With its compliance to environmental and safety standards, the SN74LS221NSR ensures long-term reliability and ease of integration into modern electronic systems. Whether used in industrial control systems, digital communication networks, or advanced timing circuits, the SN74LS221NSR provides the precision and performance needed to meet the demands of today's electronics industry.

SN74LS221NSR Documents

Download datasheets and manufacturer documentation for SN74LS221NSR

Datasheets :

SN54/74221, SN54/74221      

PCN Packaging :

Carrier Tape Revision A 06/Mar/2015       Carrier Tape Revision B 30/Mar/2015      

HTML Datasheet :

SN54/74221, SN54/74221