NCN4555MNR2G Integrated Circuits (ICs)

NCN4555MNR2G Application Field and Working Principle

NCN4555MNR2G belongs to the category of Logic-Translators, Level Shifters which are programs that translate and change the levels of digital inputs and outputs. The NCN4555MNR2G integrated circuit (IC) is a 3.2V to 1.8V level shifter that gives backward compatibility to 1.8V logic for 3.2V systems such as A/D Converters, D/A converters and more.

The NCN4555MNR2G is a type of logic translator or level shifter which features a 3.2V to 1.8V operating voltage which helps in providing backward compatibility between different power sources, mainly between a 3.2V system and a 1.8V logic controller. It contains two identical bidirectional I/O lines which translate the digital logic levels of 3.2V to 1.8V and 1.8V to 3.2V.This bi-directional digital level translator can operate over a wide range of voltages including a -0.3 volts minimum input voltage, a 4.5V maximum input voltage, a 1.2V minimum output voltage, and a 3.75V maximum output voltage. It has a low static power dissipation of 4 nA and a low dynamic power dissipation of 600 uW.

Application Fields for NCN4555MNR2G

The NCN4555MNR2G is useful in applications where there is a requirement to shift the voltage levels of the bidirectional data bus due to the usage of different voltage supply sources. It is mainly used in consumer electronic devices such as digital cameras and digital video cameras where they are required to transfer data between a 3.2V and a 1.8V logic controller. It is also suitable for applications in which logic values require translation between other levels.

Working Principle

The NCN4555MNR2G has two identical bidirectional I/Os that translate between low voltage and high voltage digital logic signals. The IC translates 3.2V (high voltage) signals to 1.8V (low voltage) and vice versa. The output voltage is controlled by the voltage at a reference pin.The IC has two pull-up transistors which are connected to supply voltage and two pull-down transistors which are connected to ground. When the input pin is at high voltage level, the pull-up transistors are enabled and pull the output pin to supply voltage. When the input pin is at low voltage level, the pull-down transistors are enabled and pull the output pin to ground.The IC also has two dual-threshold comparators which detect whether the input voltage is above or below a certain voltage level. The thresholds of these comparators are set with a reference pin. The reference pin can be connected to an external voltage source or directly to the supply voltage.The outputs of these comparators are used to enable the pull-up and pull-down transistors, respectively, which eventually controls the output voltage.

Conclusion

The NCN4555MNR2G is a logic translator and level shifter that is used for backward compatibility between 3.2V and 1.8V logic systems. It has two bidirectional I/O lines which translate between 3.2V and 1.8V levels, and a wide range of operating voltages. It is most commonly used in digital cameras, digital video cameras and other applications that require voltage translation between different levels.