PMIC - Supervisors

The X40421S14I-AT1 belongs to a family of voltage supervisors called PMIC - Supervisors. It is a 3.3V IC that is used to detect and reset any system powered by 3.3V or lower voltage, or to generate an interrupt when the voltage drops below a certain pre-defined threshold or rises above a certain pre-defined threshold, or stay within an acceptable range.

The main purpose of this voltage supervisor is to prevent a system from operating outside of its designed range. It can monitor voltage levels in the system and if the voltage drops or rises to a point where the system components may become damaged, the supervisor can trigger a reset or generate an interrupt to notify the system. This can help prevent damage to the system caused by voltage transients, overvoltage and undervoltage faults.

The X40421S14I-AT1 voltage supervisor has a wide operating temperature range of -40°C to +125°C. It has built-in protection against short-circuit, overvoltage, and over-current. It also has an adjustable reset output delay time and an adjustable reset active time. The reset output can be configured as active-low, active-high, or open-drain.

The voltage supervisor can detect voltage levels at both digital and analog levels. It can also detect temperature levels and detect whether the system is operating in a normal or abnormal state. It is designed to be used in automotive, industrial, and medical applications. It can be used to detect low-battery levels, monitor system power supplies, and detect over-temperature conditions.

The X40421S14I-AT1 voltage supervisor features a 2.25V to 3.6V supply voltage range, 100nA (Typical) supply current and 0.1µA (Typical) standby current. It has a low operating voltage of 1.5V and a voltage accuracy of ±3%. It has a frequency range from 1 kHz to 200 MHz, a slew rate of 400 kHz, and a reset output voltage of 0.8V to 3.6V. The reset output is an open-drain output, and can be controlled through an I2C interface.

In summary, the X40421S14I-AT1 voltage supervisor is used to detect and reset any system powered by 3.3V or lower voltage, generate an interrupt when the voltage drops or rises, and to stay within an acceptable range. It is designed for a wide range of applications, from automotive to industrial to medical, and features a wide operating temperature range, low operating voltage, and adjustable reset active time and reset output delay time.