MAX14548EEWL+T

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The MAX14548EEWL+T is a Logic-Translators, Level Shifters device that performs bi-directional level translation between 1.65V to 5.5V. It extends the usage of 1.65V I/Os, including those found on low-voltage microcontroller technology, for compatibility with 5.5V logic devices. Furthermore, the device features an integrated low-voltage detector (LVD) for dynamic input logic-voltage detection and circuit protection. This article discusses the application fields and working principle of the MAX14548EEWL+T.

Application fields

The device is used in a wide range of applications where bi-directional level translation between 1.65V to 5.5V is required. Examples include interfacing high-voltage 5.5V logic to low-voltage microcontrollers, low-voltage FPGAs, and CCD cameras. Additionally, it is suitable for a range of low-power designs, such as medical, automotive, and networking applications.

Working principle

The MAX14548EEWL+T consists of two main sections; Level Tranlator and LVD. Each section is controlled by logic inputs and provides bi-directional level translation.

Level Translation

The Level Translation section has two inputs, IN0 and IN1. These inputs are connected to the 1.65V and 5.5V logic system sources. Depending on the logic-level at the input pins, the outputs, OUT0 and OUT1, are driven to the corresponding level. When both the inputs are low, the device is in the low state and both outputs are low. When both inputs are high, the device is in the high state and both outputs are high.

Low-Voltage-Detector (LVD)

The Low Voltage Detector (LVD) section is used to detect and protect against voltage transients. The LVD section has two inputs, LV0 and LV1. These inputs are connected to ground and supply voltages respectively. When the LV0 voltage is lower than the LV1 voltage, a low signal is present at the LVD output and the outputs are forced to a safe low state. This feature is useful for systems that may experience voltage spikes or dips.

Conclusion

The MAX14548EEWL+T has a wide range of applications and can be used to bridge 1.65V and 5.5V logic. It can also protect itself against voltage transients, making it suitable for low-power designs such as medical, automotive, and networking applications.

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