SN74LV221ANSR

Series:	74LV
Packaging:	Tape & Reel (TR)
Part Status:	Active
Logic Type:	Monostable
Independent Circuits:	2
Schmitt Trigger Input:	Yes
Propagation Delay:	13.2ns
Current - Output High, Low:	12mA, 12mA
Voltage - Supply:	2V ~ 5.5V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	16-SO
Base Part Number:	74LV221

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Introduction

The SN74LV221ANSR is a logic device from Texas Instruments (TI) in their Enhanced Low Voltage family of integrated circuits. It can operate over a voltage range from 1.65V to 3.6V and is designed to provide a buffered two-input monostable multivibrator. The device is housed in a small SOT23-4 package and offers low power consumption, making it an ideal choice for battery-powered applications.

Application field

The SN74LV221ANSR can be used in a variety of logic applications such as timer/delay circuits, clock generation and pulse generation. Its monostable multivibrator configuration allows it to generate a pulse with a fixed width in response to a triggering input. This makes it highly useful in applications requiring a delayed response or one-shot timer such as automotive, telecommunications and industrial systems. The SN74LV221ANSR can be used to control motor speed, strobe lights and other devices in a wide range of applications.

Working principle

The monostable multivibrator works on the principle of triggering an output pulse in response to a change in state of an input signal. The SN74LV221ANSR has two inputs (Q and Q′) and an output (OUT). When Q is high and Q′ is low, the output (OUT) is held low. Once Q is pulled low and Q′ is pulled high, the output is triggered and held high for a predetermined period of time (T). The device then returns to its original state and the output is held low until another trigger is applied. This cycle can be repeated indefinitely, as long as a trigger signal is applied. The duration of the pulse generated by the SN74LV221ANSR can be adjusted by adjusting the external capacitance (C) connected to the device. As C is increased, the duration of the output pulse is increased. Similarly, if C is decreased the duration of the output pulse is decreased.

Conclusion

The SN74LV221ANSR is a versatile, low-power integrated circuit suitable for a variety of logic applications. It is available in a small SOT23-4 package and can operate over a wide voltage range of 1.65V to 3.6V. The device works on the principle of a two-input monostable multivibrator and is triggered by a change in state of the input signals. It is ideal for applications requiring delayed responses or one-shot timers and can be used for controlling motors, strobe lights and other devices. The duration of the output pulse can be easily adjusted by changing the external capacitance connected to the device.

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