MAX709TCSA+T

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MAX709TCSA+T, which falls under the category of PMIC – Supervisors, is a low-power, precision voltage monitor. As a supervisor device, it monitors an operating supply voltage and then reset a system when the input voltage drops to an user-defined threshold. It is a three-terminal active-low reset device with an integrated power-on reset circuit that provides missing pulse detection to prevent any false reset. It is used in both high-end and low-power applications, such as mobile phones, tablets, computers, and wearable devices.

The MAX709TCSA+T consists of a voltage detector, manual reset switch, and reset output. The voltage detector monitors two adjustable thresholds and triggers the reset output when the input supply voltage drops to or below the lower threshold. Since the reset voltage is programmable over a wide range, the MAX709TCSA+T can be used in applications that require various reset voltages. Furthermore, its manual reset switch allows the reset output to be asserted and reset even when the main power supply is off. The reset output is open-drain and must be pulled up externally to VDD.

The working principle of the MAX709TCSA+T can be explained as follows. The voltage detector senses the voltage at the input pin and compares it to the lower and upper thresholds. The output signals are used to control the reset output pin. When the input voltage falls below the lower threshold, the reset output pin is activated and pulls the open-drain reset line low. When the input voltage rises to or above the lower threshold, the reset output pin is deactivated and the open-drain reset line is pulled high.

The MAX709TCSA+T offers an internal active-low output delay to prevent any false reset. The output delay is programmable via an external capacitor and is inversely proportional to the size of the external capacitor. Furthermore, its integrated missing pulse detection circuit ensures that any missing clock pulses will not cause a false reset.

The MAX709TCSA+T is designed to operate over a wide temperature range and is available in the mainstream 8-pin TDFN package. It has an operating voltage range from 1.5V to 5.5V and is capable of operating from -40°C to +85°C. Furthermore, its low operating current requirements of just 32µA makes it suitable for a wide range of applications that require low power consumption.

In summary, the MAX709TCSA+T is a low-power, precision voltage monitor that falls under the category of PMIC – Supervisors. It has an integrated power-on reset circuit that provides missing pulse detection, programmable reset voltage, and manual reset switch. It is available in an 8-pin TDFN package with an operating voltage range from 1.5V to 5.5V and operating temperature range of -40°C to +85°C. Furthermore, its low-power feature makes it suitable for various low-power applications.

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