Maxim Integrated MAX6721UTRGD3T Microprocessor Supervisory Circuits

The Maxim Integrated MAX6721UTRGD3T is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a single power-supply voltage.

This supervisory circuit ensures that the µP is properly reset during power-up, power-down, and brown-out conditions. The MAX6721UTRGD3T has a factory-trimmed reset threshold voltage, making it suitable for applications that require precise voltage monitoring without the need for external adjustments.

The device features a manual reset input, which provides a robust solution to initiate a system reset. This input can be triggered with an external switch or logic signal, allowing for a system reset without cycling the power. The MAX6721UTRGD3T also includes a watchdog timer that monitors the µP or microcontroller, ensuring it is operating correctly. If the µP fails to strobe the watchdog input within a preset timeout period, a system reset is asserted.

With its small SOT23-6 package, the MAX6721UTRGD3T is an ideal choice for space-constrained applications. It operates over an extended temperature range, making it suitable for use in a variety of environments, from commercial to industrial.

Key features of the MAX6721UTRGD3T include:

• Factory-trimmed V_CC reset threshold voltages
• Debounced manual reset input
• Watchdog timer with 1.6s timeout (min)
• Low supply current of 7µA (typ)
• Guaranteed reset valid to V_CC = 1V
• Immune to short V_CC transients
• Wide operating temperature range: -40°C to +85°C

The MAX6721UTRGD3T is a versatile solution for system monitoring, providing the necessary features to safeguard your system against power supply variations and ensuring the smooth operation of your microprocessor or microcontroller-based applications.

Whether you're designing consumer electronics, industrial control systems, or portable battery-powered devices, the MAX6721UTRGD3T from Maxim Integrated offers a compact, efficient, and reliable solution for your supervisory circuit needs.