SN74AVCH32T245KR

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Logic translators, level shifters and Texas Instruments’ SN74AVCH32T245KR all share a common purpose: to provide an interface between various logic levels and drive signals long distances. Understanding their working principles and application fields can help individuals and organizations develop suitable, dependable signal interfaces.

Gates and other digital integrated circuits (ICs) increasingly require the power to handle varying signal input, understand the logic level and manage the proper output. Logic translators and level shifters ensure that critical components can communicate regardless of the signal type or intensity. By changing signal voltage levels between logic families, these components protect from signal damage caused by unmatched logic configurations, thereby preventing failure and maintaining design integrity.

The SN74AVCH32T245KR is one such device. Its purpose is to provide a level-shifting solution between VCC 0.9V to 3.6V and VCC 2V to 3.6V logic families. The device works by accepting an input signal at one of these two logic levels and “translating” or level-shifting the voltage into one of the two others. The device features two active-low data enable inputs and two active-high outputs, which can reduce system power consumption when enabled in low-power and standby modes.

Additionally, this device has live-insertion/live-extraction (LIE) and latching (LAT) features that allow hot insertion, configuration and diagnostics without compromising logic data. The SN74AVCH32T245KR also has selectable Schmitt-trigger input buffers that appear between the input and output stages, providing noise filtering on the outputs in the presence of high-frequency transitions. Its power-on-reset input toggles the outputs between a low-voltage state and approximately VCC-2V when inactive.

Typical application fields for the SN74AVCH32T245KR include portable devices, or those subject to greater motion, vibration or humidity. Note, however, that the device is not suitable for applications with a maximum of 5.5V or over-temperature conditions, as it does not have protection from polarity reversal. To further increase the level of safety, a Schottky diode can be added at the output.

In summary, the SN74AVCH32T245KR provides an ideal solution for any application requiring level shifting between two logic families. Its latching and power-on features ensure that its functions are heavily protected. It is important to note, however, that it is an open-drain device and is not suitable for applications involving greater than 5.5V.

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