DS1239-5

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The DS1239-5 is a part of the DS1239 series of power management integrated circuits (PMICs) marketed by Dallas Semiconductor. This series of products provides a variety of useful functions and features, including voltage supervisory and voltage detection functions, as well as programmable shutdown and reset features, making it ideal for use in a variety of applications. The DS1239-5 is a voltage supervisor IC, designed to monitor power supply voltages and provide a specified reset signal when an over-voltage, under-voltage, or reverse-voltage condition occurs.

The DS1239-5 provides an integrated four-level voltage detector and a dual power supply reset circuit. It also provides two active-high (A and B) and two active-low (A and B) outputs that can trigger a reset signal. The four-level voltage detector is configured with a sense input and an internal reference voltage, which can be programmed using an external resistor divider. The DS1239-5 supports a wide input voltage range of 2.2 V to 5.5 V, with an accuracy of ±1%. The output voltage of the voltage detector can be set to trigger a reset signal prior to the actual undervoltage or overvoltage conditions, avoiding any potential damage to system components.

The DS1239-5 also features a dual power supply reset circuit. This feature allows the user to reset both the power supply and the operating system simultaneously when a reset or power failure occurs. The reset signal is generated by two outputs (A and B), which are active-high and active-low respectively. Output A is used to reset the system, while output B is used to reset the power supply. Output A and B can be configured independently, so the reset threshold for each output can be different. Additionally, the dual power supply reset circuit can be configured to reset both the system and the power supply simultaneously.

Finally, the DS1239-5 also features configurable timeout settings. A timed reset feature allows the device to reset the system without a power supply applied. This can be used to reset the system after a certain period of time, or when an abnormal condition is detected. Additionally, the device has the ability to delay the system reset signal when an overvoltage or under-voltage condition occurs. This delay can be specified by adjusting the timer circuit setting of the device.

In summary, the DS1239-5 offers several versatile features and functions, making it suitable for a variety of applications. Its four-level voltage detector, dual power supply reset circuit, and configurable timeout settings allow it to meet the needs of different scenarios. This makes the DS1239-5 an ideal choice for voltage supervisor applications, where accurate voltage monitoring and reliable reset signals are required.

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