MAX705CSA+T Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	4.65V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	MAX705

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Introduction to MAX705CSA+T Application Field and Working Principle

The MAX705CSA+T is a highly integrated precision microprocessor supervisory circuit (SBC) used to monitor battery voltage and signaling to microprocessors and other system components. The device has an operating temperature range of -40 °C to 85 °C and can be used in applications such as DC/DC point-of-load regulation systems, battery-powered products and automotive electronics.The MAX705CSA+T operates in one of four different modes and uses two integrated analog comparators to monitor an adjustable undervoltage (UV) and overvoltage (OV) threshold. The device has a precision time delay between an undervoltage warning and an overtemperature shutdown event. It also features an integrated temperature sensor and a high temperature warning output.

Features and Benefits of MAX705CSA+T

The MAX705CSA+T has a wide range of features and benefits making it suitable for a variety of applications. The device features an integrated power-on reset (POR) circuit to ensure proper initialization of digital circuits and interfaces. The device also features five low voltage detect inputs which can be used to monitor system voltages. The MAX705CSA+T has an integrated temperature sensor that detects dangerous over-temperature events and has a wide input voltage range from 1.8V to 5.5V. The device also has low current consumption, making it suitable for use in battery-powered products. Finally, the device has an adjustable temperature threshold, providing users with the flexibility to choose the temperature point at which a warning or shutdown event will occur.

MAX705CSA+T Working Principle

The MAX705CSA+T uses two integrated analog comparators to monitor an adjustable undervoltage (UV) and overvoltage (OV) threshold. It can operate in one of four different modes. In "fixed” mode the UV and OV thresholds remain fixed, while in the “variable” mode the UV and OV thresholds are able to be dynamically adjusted.When the device is powered up, the UV and OV thresholds are checked and, if necessary, adjusted. The device then monitors the system voltage based on the programmed thresholds. If the voltage drops below the UV threshold, an on-chip POR is activated, which forces the system to reboot and allows the microprocessor or other devices to reset to their original state.If the voltage rises above the OV threshold, a warning is output indicating the system is overvolted. Depending on the operating mode, the device can either shut down when the voltage remains above the OV threshold for a certain period of time, or the voltage can be monitored continuously.The device also has an integrated temperature sensor, which can be used to detect dangerous over-temperature events. The temperature threshold can be programmed to a value that best fits the application needs, and a warning or shutdown can be triggered when the temperature exceeds the programmed threshold.

Conclusion

The MAX705CSA+T is a highly integrated microprocessor supervisory circuit designed for battery- powered products and other systems requiring precision monitoring of system voltages and temperatures. It features five low voltage detect inputs, an integrated temperature sensor and a wide range of adjustable thresholds. The device is able to detect either undervoltage or overvoltage conditions and can be programmed in one of four operating modes. It is also low power and has a temperature warning output to indicate over-temperature events.

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