X5083V8I-4.5A

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Supervisory circuits are dedicated on-chip circuit blocks used to provide power management functions over different voltage rails. The X5083V8I-4.5A is one such supervisory circuit designed for monitoring multiple supply voltages in system power-management applications. Furthermore, this device from Texas Instruments is highly configurable and can be used for a wide variety of applications that require monitoring of multiple power rails. The X5083V8I-4.5A comes with integrated advanced power-management features, making it an ideal choice for applications in the industrial, communication, automotive, and portable-device markets.

The X5083V8I-4.5A provides multiple power-management functions. It can be configured as an over-voltage supervisor with adjustable threshold levels, as an under-voltage supervisor with adjustable reset delay time, or as a programmable power-fail supervisor. The device also provides a clock-monitoring circuit, which is able to detect abnormal deviations in frequency, detect abnormal peak-to-peak input signals, or detect clock enable/disable transitions. Additionally, the X5083V8I-4.5A provides advanced diagnostic features, such as hardware rapid response latch (RRL) assertions, auto-clearing with under-voltage supervisor reset, and system power off control. The device also features burn-in and ATE testing capabilities. The X5083V8I-4.5A has thermal-shutdown protection, erasing capability for metal fuse functions, reset output delay, and manual reset.

The X5083V8I-4.5A is designed to operate on a +3.3V, +2.5V, +1.8V, +1.2V, or +1.5V supply and provides a wide range of output voltages of 0.2V to 7.0V. It includes four integrated, type II, 5-bit, voltage-monitoring circuits, each with four unique voltage-monitoring levels. The X5083V8I-4.5A also includes additional configuration and control logic required to implement more complex power-management functions, such as early warning, power fail reset, and manual reset. The device is available in a space-saving 11-pin ceramic leadless chip carrier package.

The X5083V8I-4.5A is mainly used for system power-management applications, such as voltage supervision, clock monitoring, and reset generation for microprocessors, digital signal processors, and programmable logic devices, as well as for battery monitoring in automotive and portable applications. It is also suitable for general-purpose reset or reset-delay generation for almost any type of microcontroller or digital logic circuit.

The main operating principle of the X5083V8I-4.5A is based on the comparison of a preset voltage threshold with a monitored input voltage. The device implements an internal analog-to-digital converter (ADC) to compare the monitored input voltage against the threshold level programmed by external resistors to determine whether an output should turn on or turn off. If an overvoltage condition is detected, the reset output turns on and a reset signal is sent to the target device. Conversely, if an undervoltage condition is detected, the reset output is turned off, allowing internal logic to reset the target device. Additionally, the programmable power-fail supervisor monitors power supply voltage and whenever a power failure is detected, the device will prevent the target device from operating until the power failure condition is cleared.

In conclusion, the X5083V8I-4.5A is a highly configurable supervisory circuit designed for monitoring multiple power rails for system power-management applications. It is mainly used for voltage supervision, clock monitoring, reset generation, and battery monitoring. The device is capable of implementing an internal ADC to compare a monitored input voltage with a threshold level programmed by external resistors and can provide rapid-response latch (RRL) assertions and manual reset for system reset control. It is available in a space-saving 11-pin ceramic leadless chip carrier package and is well-suited for various applications in the industrial, communication, automotive, and portable-device markets.

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