DS1238-10

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PMIC (Power Management Integrated Circuits) are useful electrical components that help to improve energy efficiency, protect systems from unexpected shutdowns and enable features like standby operation and sleep mode. Supervisors such as the DS1238-10 are an important aspect of PMICs, allowing developers to set alarms that trigger the shutdown of any given peripheral in the system, warn of an imminent fault or simply monitor the supply voltage and other system parameters. In this article we will discuss the application field and working principle of the DS1238-10 in more detail.

The DS1238-10 is a 3.2V supervisor for embedded systems. It combines a precision voltage monitor, adjustable reset/power-on reset and system reset output, reset delay and watchdog timer in a small 4-pin SOT-23 package. The DS1238-10 is designed for systems requiring system reset, supply voltage and watchdog timer monitoring, and is ideal for applications where space and power are important such as microcontroller-based systems.

The DS1238-10 has an adjustable supply voltage threshold. This means that if the supply voltage drops below the programmed voltage threshold, the DS1238-10 will generate a reset pulse. The DS1238-10 also includes a watchdog timer with selectable time-outs, which is useful for situations where the system has gone into a lock-up and needs to be restarted. The DS1238-10 can also generate power-on reset (POR) pulses and reset delay functions, which are useful for ensuring that all system components become ready for operation after power-on before the system can start.

The DS1238-10 is suitable for a variety of applications including embedded systems, point-of-sale terminals, industrial control systems, automotive systems, and medical devices. It is designed to meet the most demanding requirements and offers enhanced reliability, flexibility and accuracy. The DS1238-10 can be used to protect against Reset, Voltage Monitor, System Reset, Power-on Reset and Watchdog Time-out.

The working principle of the DS1238-10 is relatively simple. The reset and power-on reset outputs are triggered when the voltage monitoring circuit detects a voltage drop below the programmed threshold voltages. The watchdog timer is independent and can detect a system lock-up due to code failure. The reset delay allows the system to wait for all system components to become ready and start the system after a power-on reset event.

The DS1238-10 also offers flexible reset and watchdog timer configuration. It has a 3-pin serial interface for programming the reset and watchdog timer parameters, providing a high degree of flexibility for system designers. The reset threshold, reset delay and watchdog timer are all selectable. The watchdog timer can be set to generate a reset pulse if the system has been unresponsive for a certain amount of time, allowing the system to complete an orderly shutdown in an unexpected or catastrophic event.

In conclusion, the DS1238-10 is an excellent choice for embedded systems requiring system reset, supply voltage and watchdog timer monitoring. Its flexible reset and watchdog timer configuration, adjustable supply voltage threshold and reset delay features make it ideal for a variety of applications. The DS1238-10 is a safe and reliable supervisor that can help to improve energy efficiency and protect systems from unexpected shutdowns.

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