DS1836DS-20/T&R

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PMIC - Supervisors are widely used in today\'s electronic circuits, and the DS1836DS-20/T&R is a popular example for users. It is a programmable supervisor circuit that can detect the power supply voltage and the temperature of the system, and provide low-power reset, interrupt, and power fail signals.

Application Field

The DS1836DS-20/T&R is designed to monitor multiple input sources, such as power supply voltage, power supply temperature, and other system signals. It provides dual reset output signals for resetting low-power firmware and hardware. The dual reset outputs can be configured in rising or falling edge reset mode, allowing for greater flexibility when designing complex dual-supply systems.

In addition, the DS1836DS-20/T&R provides low-power system interrupts and power fail signals of up to 5mA at 3.3V voltage, making it ideal for low-power IT applications. With a wide input range from 2.5V to 15.9V, it is well-suited for portable systems and embedded applications. It is also capable of providing watchdog timers to prevent system hangs due to undetected errors.

Working Principle

The DS1836DS-20/T&R uses two comparators to compare the voltage and temperature of the system. The two comparators can be enabled separately or enabled in both normal and inverted mode. When the monitored voltage or temperature exceeds the programmed threshold, an interrupt is generated, or a reset signal is issued. These reset signals can be de-asserted by cycling the power or providing the appropriate reset signal.

The DS1836DS-20/T&R also provides a watchdog timer to prevent system hangs due to undetected errors. The watchdog timer operates in a one-shot or periodic mode and provides an interrupt when the time interval is exceeded. The time interval can be programmed via the LVPECL Interface. The watchdog timer can also be disabled if not needed.

The DS1836DS-20/T&R provides programmable input pins for output voltage and polarity control. This can be used to control the polarity and voltage of the output signals. The resistor values and capacitor values can also be programmed to ensure that the output signals are generated with the desired frequency and voltage.

Finally, the DS1836DS-20/T&R can also monitor the power rail voltage and detect under-voltage conditions. This can help prevent long-term damage to the system due to low voltage conditions. If the voltage drops too low, a reset signal is issued. This ensures that the system is not damaged due to continuous operation at low voltages.

Conclusion

The DS1836DS-20/T&R is a programmable supervisor circuit that can detect power supply voltage and temperature. It provides low-power reset, interrupt, and power fail signals, as well as a watchdog timer to prevent system hangs. With its wide input range and large output voltage and current ratings, it is an ideal choice for low-power IT applications.

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