74ACTQ08SJ

Current - Output High, Low:	24mA, 24mA
Base Part Number:	74ACTQ08
Package / Case:	14-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	14-SOP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Max Propagation Delay @ V, Max CL:	6.5ns @ 5V, 50pF
Logic Level - High:	2V
Logic Level - Low:	0.8V
Series:	74ACTQ
Current - Quiescent (Max):	2µA
Voltage - Supply:	4.5 V ~ 5.5 V
Features:	--
Number of Inputs:	2
Number of Circuits:	4
Logic Type:	AND Gate
Part Status:	Obsolete
Packaging:	Tube

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Introduction to 74ACTQ08SJ

74ACTQ08SJ is a TTL-compatible quad 2-input AND gate. It operates over a wide supply voltage range, from 4V to 6V, with output drive capability of 10 LSTTL loads. 74ACTQ08SJ is ideal for use in low-voltage and high-speed logic applications. It has low power consumption of controlled rise and fall times, and can source and sink up to 16mA of current.

Application Field and Working Principle

The 74ACTQ08SJ can be used for a variety of applications including arithmetic and logic applications, for example, data manipulation and buffering, interval timing, data encoding, filtering, and many others.The 74ACTQ08SJ is specifically designed to combine two signals and output their AND logic function. It consists of four, two-input AND gates with open-collector outputs which can be connected to other gates to implement any desired logic function.The two inputs can be LOW (0V) or HIGH (2V to 6V). When either one or both inputs are LOW, the output is LOW. When both inputs are HIGH, the output is HIGH. The output of the 74ACTQ08SJ is open-collector, meaning that the output can be pulled LOW, but cannot be pulled HIGH.The inputs of the 74ACTQ08SJ are connected to series-connected, pull-up resistors, allowing the gate to detect the LOW state of an unconnected input. Without this "wire-ANDing" feature, the output of an unconnected gate can float, generating unpredictable output results. The pull-up resistors also limit the amount of current sourced from the gate inputs.The 74ACTQ08SJ can also be used as a simple comparator. Because the output of the gate is open-collector, and can only be pulled LOW, it can be used to compare the levels of two input signals and output a LOW when they are different.

Conclusion

The 74ACTQ08SJ is a reliable and effective TTL-compatible quad 2-input AND gate with open-collector outputs. It is ideal for applications that require high-speed logic, low-power consumption, and accurate data manipulation. Its ability to wire-AND inputs allows it to detect the LOW state of unconnected inputs, while its open-collector output allows it to be used as a simple comparator.

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