APX809S-40SA-7

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Featuring a very low quiescent current and a variety of watchdog timer and reset functions, APX809S-40SA-7 supervisors are widely adopted in power management integrated circuits, also known as PMICs. Created to monitor and regulate the power supply of devices, PMIC supervisors are very versatile and important safety measures for a system. While the APX809S-40SA-7 supervisor is applicable for a wide array of systems, it’s most commonly used in personal computers and micro controllers.

The APX809S-40SA-7 is a programmable output voltage supervisor equipped with a watchdog timer, reset output, and pushbutton reset response feature. It operates through an open-drain output based on its own reference voltage, VDD, and a selectable reset threshold voltage, RST, that is built into the device or externally grounded. As such, APX809S-40SA-7 devices are capable of detecting low VDD and/or high RST conditions, thus providing over-voltage, under-voltage and brownout protection. When combined with a variety of secondary hardware components such as batteries and capacitors, the APX809S-40SA-7 can make up power-management systems that are lower in cost and more reliable than custom designed solutions.

The APX809S-40SA-7 also features a pushbutton reset response feature. It allows the supervisor to respond to a specific button press and have a set time between subsequent button presses. This unique feature ensures a complete power cycle and reset of the system. The supervisor’s reset function can be enabled or disabled via its internal register, which allows the user to customize the device for their specific requirements.

An important added bonus of the APX809S-40SA-7 supervisor is its low quiescent current. At around 3 microamps, this is one of the lowest in its class, letting it monitor activity of devices without draining the battery. This supervisor also features an internal transistor stage for active-low RST output that requires no additional external circuitry, thus simplifying the design of power management systems and saving costs.

In addition to the above, the APX809S-40SA-7 supervisor also features a wide operating temperature range of between -20°C and +85°C and comes with a variety of watchdog timeouts that can be set via the internal registers. This makes it an ideal choice for many applications in microcontroller and computer systems.

In summary, the APX809S-40SA-7 supervisor is a device designed to monitor and regulate the power supply of systems, featuring a variety of functions such as low quiescent current, a watchdog timer, and a wide operating temperature range. It is most commonly used in personal computers and micro controllers, but it can also be used in a variety of other applications. As such, it is widely adopted in power management integrated circuits and is an important safety measure for a system.

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