LTC699IN8#PBF

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The LTC699IN8#PBF is a Precision Microprocessor Reset Circuit with Watchdog Timer. It is classified as a PMIC (Power Management Integrated Circuit) - Supervisor, which is designed to provide excellent reset and power failure protection for microprocessors, FPGAs, ASICs, and other integrated circuits in digital systems. The LTC699IN8#PBF is housed in a SOT-23-5 package, and is tailored to operate in a wide temperature range of -40°C to +125°C. The LTC699IN8#PBF features an adjustable delay time, an active-low reset signal, and a power fail indicator, as well as 4ms watchdog timer and power fail detector.

The primary application of the LTC699IN8#PBF is to provide protection for microprocessor-based systems from a variety of problems that can cause the system to fail or behave unpredictably. The chip can detect a variety of power failure conditions, including a weak or over-voltage, as well as a sudden decrease or increase in output voltage levels. Additionally, the chip can detect a low voltage or a fast clock edge transition. The reset circuit of the LTC699IN8#PBF ensures that, under any of these conditions, a reset signal is output, thus shutting down the device and preventing it from further damage.

The working principle of the LTC699IN8#PBF is based on an integrated resistor-capacitor (RC) circuit that contains a threshold voltage value. When the voltage reaches or surpasses the threshold voltage, the RC circuit triggers a reset signal, alerting the microprocessor to take the appropriate action. This reset signal can be configured to fit different applications and is adjustable via a resistor in the RC circuit. Additionally, the watchdog timer of the LTC699IN8#PBF can be independently adjusted to detect slower transitions on the system\'s watchdog input, ensuring more reliable protection. The power failure indicator of the LTC699IN8#PBF allows the microprocessor to detect if an unexpected power failure has occurred.

In conclusion, the LTC699IN8#PBF is a precision microprocessor reset circuit with a watchdog timer, and is classified as a PMIC (Power Management Integrated Circuit) - Supervisor. This chip provides excellent reset and power failure protection for microprocessors, FPGAs, ASICs, and other integrated circuits in digital systems. Its primary application is to detect and protect against a variety of power failure conditions and its reset circuit ensures that, under any of these conditions, a reset signal is output, thus shutting down the device and preventing it from further damage.

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