MAX16021LTEM+

Introduction

MAX16021LTEM+ is a low voltage, low power microprocessor supervisor with a watchdog timer and windowed power monitor (WPM) from Maxim Integrated. It is the next generation supervisor IC that combines a simple windowed power supply monitor with a microprocessor reset generator and an intelligent watchdog timer (WDT) all in an 8 pin package. This supervisor helps to ensure that microprocessors, digital signal processors, and other critical integrated circuits in the system remain in a known state when power or other critical electrical events occur.

Application Field of MAX16021LTEM+

MAX16021LTEM+ is ideally suited for microcontrollers, digital signal processors, and system power management applications. It is designed for reliable protection of embedded systems and high-performance analog & digital designs.

Maxim Integrated’s LOWVOLT microprocessor supervisory circuit is used in many application fields, such as automotive, industrial, scientific instrumentation and networking. In particular, the low voltage and low power consumption makes the MAX16021LTEM+ well suited for automotive, industrial and scientific instrumentation applications.

MAX16021LTEM+ is available in a variety of packages including an 8-pin SOIC, 8-pin DSOIC and 8-pin VSSOP. It is designed to operate over a wide temperature range, making it well suited for most any application.

Working Principle of MAX16021LTEM+

MAX16021LTEM+ is a low voltage, low power microprocessor supervisor with a watchdog timer and windowed power monitor (WPM). This supervisor ensures that microprocessors, digital signal processors, and other critical integrated circuits in the system remain in a known state when power or other critical electrical events occur.

The MAX16021LTEM+ uses a WPM circuit to monitor input power supplies. The WPM monitors the +3.3V / +5.0V / +5VSB / +12V and +1.2V inputs, ensuring that they stay within their specified voltage ranges. If any of the monitored input supplies fall out of their range, the WPM will assert a reset to the microprocessor. The WPM is also used to detect brown-out conditions and can be used to trigger a system reset.

In addition to the WPM circuit, the MAX16021LTEM+ also includes a watchdog timer. The watchdog timer can be used to monitor software execution, and can be used to assert a reset on the microprocessor if software execution deviates from the expected conditions. The watchdog can be programmed with a timeout period from 4ms to 4s, providing for a wide range of applications.

Conclusion

MAX16021LTEM+ is a low voltage, low power microprocessor supervisor with a watchdog timer and windowed power monitor (WPM) from Maxim Integrated. It is the next generation supervisor IC that combines a simple WPM with a microprocessor reset generator and an intelligent watchdog timer, all in an 8 pin package. This supervisor is ideal for embedded systems and high-performance analog & digital designs in automotive, industrial and scientific instrumentation applications. The WPM and watchdog timer circuits provide reliable protection of microcontrollers and system power management applications.