DS1231-20/G

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The DS1231-20/G is a member of the supervisory family of PMICs and is primarily used as an ultra-low power reset controller. It operates in a wide range of applications and provides precise voltage threshold and precise time delay functions to monitor and control conditions related to power up and power down conditions. It is ideal for designs that need a low power, small footprint option that offers precise timing and high reliability.

The DS1231-20/G operates in two main modes: active and reset mode. In active mode, the device uses a low quiescent current to monitor the voltage at its input. If the voltage drops below the reset threshold, the device asserts reset. In reset mode, the device remains in reset for the duration of the preset time delay before transitioning back to the active mode. This cycle is repeated until the input voltage remains above the reset threshold for the entire duration of the preset time delay.

The DS1231-20/G has several features that make it ideal for many different applications. It features an adjustable, precision reset threshold voltage of 1.35V to 2.6V and a minimum reset pulse duration of 4.3μs. It also has a wide range of typical power-on reset thresholds and delays, allowing flexibility in the design of reset parameters. In addition, the DS1231-20/G offers protection against power supply transients and is suitable for use in both low voltage and high voltage systems.

Due to its low power requirements, the DS1231-20/G is an ideal solution for battery powered and other low power applications. It uses a combination of a comparator and a timer circuit to provide a precise, reliable reset signal under all operating conditions. The comparator monitors the voltage at the input, and when the voltage drops below the preset reset voltage threshold, the reset signal is asserted. The timer then monitors the duration of the reset signal, ensuring that the reset signal is held low for at least the preset +delay duration.

The DS1231-20/G also features several other features and benefits, including: a reset signal filter, a wide operating temperature range, in-system programming capability, and ESD protection up to 8 kV HBM. Additionally, the device is RoHS compliant and available in a variety of packages, including SOT-23-5, SOIC-8, TQFN 3x3, and others.

The DS1231-20/G is an ideal supervisory solution for any design that requires a reliable and low-power reset controller. It is able to monitor and control conditions related to power up and power down, and offers precise timing and wide range of reset signals and delays. Its low power requirements, robust performance, and flexible programming options make it an ideal solution for a wide range of applications.

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