UCD90910RGCR

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Integrated circuits that contain both analog and digital components enable engineers to create smart, sophisticated electronic designs. Programmable logic controllers (PLCs) are a popular example of this--they are used to control and monitor small-scale industrial processes. In addition to providing the necessary intelligence, these circuits require the use of integrated supervisory circuits to guard against power supply and system status anomalies, such as brownouts or system hangs. With the fast-changing applications, the need for an adjustable supervisory circuit is also increasingly in demand. STMicroelectronics, through its UCD90910RGCR series, has developed robust field-programmable integrated supervisor circuits tailored for a wide range of applications, from power supervisory circuits to pulse width modulation (PWM) control systems.

The UCD90910RGCR series consists of two primary devices: the UCD90910, which is a fixed threshold programmable supervisor, and the UCD90914, a configurable reset supervisor IC. Both are available in a choice of packages that support a range of flexible features while providing significant improvements in board density and improved reliability. In addition, the UCD90910RGCR series offers a minimized set of components, which results in quicker design times and cost savings.

UCD90910 Application Field

The UCD90910RGCR series is a programmable logic supervisor (PLS) specifically tailored for power monitoring and PWM control systems. As a PLS, the UCD90910RGCR series should be used in situations where a reset is necessary to maintain system stability. The ability to adjust the thresholds of the UCD90910 means it is well-suited for applications such as power converters, DSL systems, and PoE applications. The UCD90910 offers adjustable thresholds with a minimum delay time of 5.05µs, thereby increasing the power conversion efficiency.

Working Principle

The UCD90910RGCR series operates based on instantaneous digital output patterns, hence making it more reliable than other reset supervisors. It has 3 inputs that provide precision monitoring of activity levels, allowing the IC to recognize reset conditions faster than other traditional reset supervisors. Furthermore, the UCD90910RGCR series is highly integrated and only requires minimal external components for it to function. It is powered by a 3.3V supply and has an operating temperature range between -40°C to +125°C.

The UCD90910RGCR is a high-performance supervisor manufactured using an advanced CMOS process which provides adjustable trip points in order to meet the requirements of different application environments. The supervisor features an open-drain output with an adjustable delay to ensure that a reset signal is issued if any of the 3 monitored inputs become inactive. The outputs can detect any type of signal, including low-frequency signals, ensuring that any signal above the adjustable threshold is accurately measured.

Features and Benefits

The UCD90910RGCR series offers superior performance and superior reliability. Its adjustable trip points have been designed to be compatible with a wide range of application environments, from single-cell to multi-cell battery powered devices. The very low minimum trip time of 5.05µs makes it suitable for high power, low latency applications such as those found in industrial automation, telecom and data processing systems.

The UCD90910RGCR\'s integrated components reduce the number of pullup components needed, thereby simplifying the design. Furthermore, the open-drain output allows a wide range of application options, such as logic pointing to other devices. The UCD90910RGCR also features an adjustable rise time and reset delay, making it ideal for use in multiple power sources. Last but not least, its temperature range of –40°C to +125°C enables it to operate in extreme conditions.

Conclusion

The UCD90910RGCR series, a field-programmable integrated supervisor IC, is a versatile device suitable for a wide range of applications. It provides adjustable trip points, integrated components and open-drain output which makes it ideal for many types of projects. The UCD90910RGCR also requires minimal external components and has an operating temperature range of -40°C to +125°C. This series therefore provides an ideal solution for power supervisory and PWM control systems.

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