LTC1726HMS8-5 Triple Supply Monitor and Microprocessor Supervisor

The LTC1726HMS8-5 is a high-performance triple supply monitor and microprocessor supervisory circuit designed by Linear Technology, now part of Analog Devices Inc. This precision device is engineered to maintain the integrity of power supplies and microprocessor systems through monitoring and control, ensuring reliable operation across a wide range of applications.

One of the key features of the LTC1726HMS8-5 is its ability to monitor three supply voltages simultaneously. It can supervise a 5V supply while also monitoring two additional adjustable threshold voltages. This triple monitoring capability is essential for systems that rely on multiple power sources, as it can safeguard each one from undervoltage conditions that could lead to system failure.

The LTC1726HMS8-5 incorporates a precise, internal 2.5% accurate bandgap reference, which is critical for setting accurate threshold voltages for the monitored supplies. Additionally, the device offers a reset timeout period that is adjustable using an external capacitor, allowing designers to customize the supervisor to the specific needs of their system.

Designed for robustness, the LTC1726HMS8-5 operates over a wide temperature range, with the "H" version functioning between -40°C to 125°C. This makes it suitable for automotive and industrial environments where temperature extremes are common. The device is offered in an MS8 package, which is a compact, surface-mountable package that is conducive to space-constrained applications.

Other notable features of the LTC1726HMS8-5 include its low supply current, which enhances overall system efficiency, and its reset and watchdog output functions. The reset output ensures that the microprocessor restarts in a known state during power-up, power-down, or brownout conditions. The watchdog timer monitors microprocessor activity and can initiate a system reset if the microprocessor fails to strobe within a preset timeout period.

The LTC1726HMS8-5 is a versatile and reliable solution for power supply monitoring and system reset management. It is widely used in microprocessor-based systems, including computers, controllers, and intelligent instruments, where maintaining correct operation of the power supply and processor is critical.