TPS389020DSER

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TPS389020DSER is a voltage supervisory device developed by Texas Instruments (TI) to keep systems running reliably at all times. It is a member of the TPS38 Series family of supervisors, targeting a wide range of operational voltages from 1.0V to 5.5V. This low-power, 200nA active quiescent current device includes an adjustable reset delay, adjustable reset active-high threshold and reset, manual reset/irq input trigger, as well as over-temperature alert indication capability. The supervisor also meets all JEDEC specifications, providing comprehensive system protection while occupying minimal board space.

The primary application field of the TPS389020DSER is voltage supervisors. It is widely used in various electronic circuits to prevent overvoltage or undervoltage conditions by resetting the processor whenever the operating voltage is outside of its normal range. The device is suitable for a wide range of applications including automotive, telecommunications, computing, and industrial. Moreover, it is also used to monitor the battery voltage in portable products. It is also widely used to monitor voltage or power-on failure in many different products such as motor controllers, appliances, and hand-held devices.

The working principle of the TPS389020DSER is relatively simple. It is a comparator device used to monitor a voltage and detect when it falls outside of the predefined low and high voltage limits. The device has two thresholds, an active-High reset threshold and a reset delay timeout delay (RdT). When the voltage on the VDD supply line is lower than the active-high reset threshold voltage, the TPS389020DSER will generate an active-high reset signal. Similarly, if the voltage on the VDD supply line is higher than the reset delay timeout delay, the TPS389020DSER will generate an active-low reset signal. In order to ensure reliable system operation, the reset signal is held for a predetermined period of time, long enough for the processor to reset itself. During this time, the reset signal must be asserted and not negated.

The TPS389020DSER also includes a manual reset/irq input that allows the device to reset the system while asserting an IRQ. This is used to expedite power-on reset processes, allowing the user to reset the system without the need to wait for a voltage to drop or rise to a certain level.

Apart from being used as a voltage supervisor, the TPS389020DSER is also used to prevent over-temperature situations. It has a built-in temperature register that alerts the system if the temperature exceeds a certain threshold. This feature prevents components from overheating and getting damaged.

In summary, the TPS389020DSER voltage supervisor from TI is a low-power device that is used to detect and alert when operating voltages are outside of normal range, as well as to detect over-temperature conditions. It is an extremely useful and reliable device for keeping systems running reliably at all times.

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