LM139APT Integrated Circuits (ICs)

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LM139A is a single supply quad voltage comparator. It was introduced in 1987 and developed by National Semiconductor Corporation. It contains four independent voltage comparators which have an on-chip reference voltage source. It uses current steering logic, which means that the input signals are compared to separate and different reference voltages. This has enabled designers to use theLM139A to compare four input signals with four separate reference signals. This makes the device very useful in many applications, including digital and multi-speed systems.

This device is made in a 14-Pin dual in-line package. It is capable of operating from a single -4.5 to + 30 volts supply. It can also survive an input signal range of -30 to +30 volts without damage. It is also capable of driving loads up to 25mA at the output. This makes it suitable for most applications requiring a high power comparator IC.

The LM139A is mainly used in applications which require ultra-high accuracy and low-power consumption. It is excellent for use in low-power switching applications, such as communications and industrial process control. It is also effective in signal conditioning and analog to digital conversion.

TheLM139A works on the principle of current steering logic. Its four independent voltage comparators measure two different input signals relative to two separate reference voltages. The signal with the higher voltage will be allowed to flow through the comparator to the output pin. The output will then be in the logic HIGH state. If the signal with the lower voltage is chosen then the comparator output will be in the LOW state.

The LM139A is an excellent choice for many applications, because of its high speed, accuracy, low power consumption and its low cost. It is suitable for wide voltage ranges and can run from a single supply unit. It can be used in digital and multiple speed circuits and is capable of driving up to 25mA of current to the output. The LM139A is also capable of comparing four input signals with different reference voltages. This makes it an effective and versatile choice for use in many applications.

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