SN74F21N

Current - Output High, Low:	1mA, 20mA
Base Part Number:	74F21
Package / Case:	14-DIP (0.300", 7.62mm)
Supplier Device Package:	14-PDIP
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 70°C
Max Propagation Delay @ V, Max CL:	5.1ns @ 5V, 50pF
Logic Level - High:	2V
Logic Level - Low:	0.8V
Series:	74F
Current - Quiescent (Max):	4.3mA
Voltage - Supply:	4.5 V ~ 5.5 V
Features:	--
Number of Inputs:	4
Number of Circuits:	2
Logic Type:	AND Gate
Part Status:	Active
Packaging:	Tube

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The SN74F21N is a logic gate from the family of F series logic gates from TI. It is intended for use in general purpose logic applications, such as logic functions between the digital input terminals and the output terminals. The SN74F21N is a double invert gate, and it’s inputs and outputs are in a TTL-compatible high and low voltage range.The SN74F21N can be used to construct a basic binary system of logic elements, such as an AND gate, OR gate, NOT gate, NAND gate, and NOR gate. These gates can be used to perform different logic operations and provide fundamental building blocks for more complex logic systems.A logic gate takes an input at its two terminals, called the A and B terminals, and produces an output at its other two terminals, called the C and D terminals. The C and D terminals are connected together, and this is called the output bus. The output of the logic gate is determined by the input given to it. If the logic gate is an AND gate, then if both the A and B inputs are logic 1, then the gate produces a logic 1 at the output bus. Similarly, an OR gate produces a logic 1 if either of the A and B inputs are logic 1.The SN74F21N is an inverter gate as well. This means that if a logic 1 is input to the A terminal, then the output at the D terminal will be 0, and vice versa. It also means that if both the A and B inputs are logic 1, then the output of the gate will be a logic 0.The SN74F21N is also used in some logic functions such as multiplexers and shift registers, where it can be used to select and store information. It is also used in multiplexers to select between multiple inputs, and in shift registers to store bits of data which can be shifted left or right as necessary.The SN74F21N can also be used to interface with other logic circuits, such as those of another logic family, such as the ECL type circuits. The SN74F21N can be used as a buffer, allowing signals to be transferred between two different types of logic circuits.The SN74F21N is a particularly useful device for applications that require high speed and low power consumptions. It is available in different speed grades and is usually produced in a wide temperature range, making it ideal for operation in a variety of environments.In conclusion, the SN74F21N is a versatile device that can be used in a variety of applications to perform binary logic operations, interface between different logic families, and provide high speed and low power consumption. Its wide temperature range and speed grades further make it one of the most popular logic gates.

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