AS1909C18-T

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Supervisors, or Supervisor/Monitor Integrated Circuit (SMICs), are specialized ICs designed to ensure that power supply voltages do not drop below safe levels. They provide assurances of uninterrupted supply power, by sensing the operating voltage level of the supply and forcing a reset signal if the voltage falls below the programmed set-point level. AS1909C18-T is a supervisor IC that belongs to this category, and it offers a wide range of safety features which make it ideal for applications such as power supply design and over-voltage protection.

The AS1909C18-T is a monolithic device that consists of an adjustable reset circuit, a low power 2.4V band-gap reference, a voltage detector, and a power on reset (POR) circuit. The reset voltage can be adjusted over a wide range of voltages using external components and by setting the external adjustable resistor connected to the reset pin. The reset threshold can be set to any voltage from 1.2V to 6.0V.

The low power 2.4V band-gap reference ensures good accuracy and stability. The voltage detector provides an active low output voltage (RSTI) which goes low when the voltage at the VDD pin drops below the reset voltage level. The POR circuit provides a reset pulse when VDD reaches the trigger voltage point. This ensures that the system is set to a predetermined state when power is applied.

The AS1909C18-T also features an active high reset output voltage (RZO) and an active low power good output voltage (ENO). The RZO signal indicates when the supply voltage has fallen below the reset voltage level and stays low until the supply voltage has returned to the normal operating level. The ENO signal is asserted when the supply voltage reaches the normal operating level.

The AS1909C18-T is a highly reliable and robust IC and can operate under extreme environmental and electrical conditions. It is highly suitable for use in low power and space constrained applications where accuracy and reliability are of prime importance. Its wide-ranging features and broad current and voltage range make it suitable for a variety of power supply and over-voltage protection applications.

Overall, the AS1909C18-T is a very reliable and efficient supervisor IC designed to ensure reliable supply power. It is ideal for applications where accuracy and reliability are of paramount importance and its wide range of features make it a versatile choice for a variety of applications. Its low power consumption and wide current and voltage range make it a great choice for low-power and space-constrained applications.

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