MAX16049ATN+

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The MAX16049ATN+ is a highly versatile and high performance supervisor circuit used in a range of applications, from simple power up circuits to complex safety-critical monitoring circuitry. It is suitable for systems with a wide operating voltage range, from a low of 2.5V to as high as 20V. It monitors the supply voltage, and provides reliable power-on reset and supply under-voltage lockout signals.

The MAX16049ATN+ is a low-power CMOS supervisor device optimized for microcontroller-based systems. It has two independent voltage detectors which can be used to generate reset and supply undervoltage detection signals. The power-on reset signal is generated when the voltage on the PP/RESET pin drops below the reset threshold voltage (VTH). This pin can also be configured as a power good output for systems which require warning of a failed or degraded power supply. The second detector, UV (under-voltage) monitor, is used to detect when VDD drops below the user-defined UV threshold voltage. This signal is used to provide an early warning of a suddently degraded supply, before VDD drops below the reset threshold voltage.

An additional feature of the MAX16049ATN+ is its power-on reset (POR) function. The POR is a timed reset which is triggered when VDD rises above the reset threshold voltage (VTH). This reset is triggered when the POR timer expires and the POR output is asserted. This enables system reset during startup and helps to ensure reliable power up and reset of a system. The POR timer can be adjusted to ensure the reset occurs at the appropriate time.

The MAX16049ATN+ is configured using four internal resistor divider networks. These networks can be programmed to give a wide range of reset, power-good, and under-voltage threshold voltages. Additional features include an adjustable VPP enable time, an adjustable VDD enable time, a VDD monitor enable input, and active-low and active-high reset output pins. The device can be configured to detect both rising and falling supply voltages, and also has an adjustable reset output pulse width.

The MAX16049ATN+ supervisor is an excellent choice for power-up reset and supply undervoltage detection in a wide range of applications. It provides reliable power-on reset and early warning of supply degradation, and its low power consumption makes it suitable for batteries and portable applications. It is also capable of detecting both rising and falling supply voltages, making it suitable for applications with dynamic power supplies. Furthermore, its adjustable reset and power-on reset output pulse widths allow it to be used in systems requiring high flexibility.

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