SP690TEN-L/TR

PMIC - Supervisors are devices specifically designed to ensure the reliable operation of electronic systems in the event of power supply irregularities. These components monitor common power supply lines, detect error conditions and then act to prevent these conditions destabilising a system. Supervisors are usually found in embedded systems, where a system reset may be used to undo any abnormality, or any external paired system may be manually reset and re-enabled.

SP690TEN-L/TR is a specialized supervisor offering enhanced protection to microcontroller-based embedded systems including those requiring monitoring of multiple voltage outputs. It provides an on-chip power-on-reset (POR) circuit, a reset signal output, an on-chip voltage supervisor, a low voltage alert (LVA) signal output, an adjustable watchdog timer and an adjustable VCC threshold. It can help prevent system failures due to under-voltage, over-voltage, power-on reset or brownout conditions.

SP690TEN-L/TR\'s unique features include its two level minimum-low-voltage detect options. The first option is a fixed threshold at 2.0V, which ensures that minimal start-up voltage is met for safe system operation. It also includes a variable 0.23-2.0V range, perfect for systems that require precise start-up voltages. This adjustable low detection threshold can be used in combination with settings from 2.0-5.5V to optimize hardware performance while still providing protection against out-of-tolerance conditions.

SP690TEN-L/TR\'s watchdog timer has an adjustable interval of 2.5 ms to 7.5 s, capable of providing totally configurable system reset timing. It also offers better accuracy than the previous version, accommodating shorter interval watchdog reset requirements, while still providing the same 2.5 ms to 7.5 s range. Additionally, the reset time is now able to be adjusted independently of the external LVC reset time.

The SP690TEN-L/TR\'s primary application field is for embedded systems that require low-voltage reset, such as embedded control systems, DSP and microcontroller applications, as well as embedded application in automotive, consumer and industrial control and communications systems. It can help protect these systems from power supply irregularities and component malfunctions.

SP690TEN-L/TR\'s working principle relies on monitoring the VCC voltage level, reporting an error condition in case of an under-voltage or over-voltage error. The integrated POR circuit helps devices reset on detection of an over-voltage condition. When the watchdog timer is enabled and the voltage is above the adjustable threshold, the timer is reset. The timer can be configured to go off at either a short duration or a long duration and will take action if the system fails to reset inside a given period. This can be useful in case of system freeze, when the system fails to transmit a reset signal or when the system needs to reset after a prolonged period of time.

The dual-level protection of the SP690TEN-L/TR makes it a valuable component in embedded designs, helping to detect and respond to any power supply irregularities quickly and effectively. Its adjustable threshold also makes it suitable for a wide range of system voltages and allows parts with similar features to be more suitable for power-sensitive applications. Its advanced features also make it easy to diagnose problems and make system corrections to prevent system destruction or malfunction.