Maxim Integrated's MAX793SESE+ Microprocessor Supervisory Circuit

The MAX793SESE+ from Maxim Integrated is a high-quality microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with +5V powered µPs. The MAX793SESE+ is particularly suitable for battery-powered systems due to its low power consumption and compact size.

This supervisory circuit ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions. The reset output remains operational with VCC as low as 1.2V, and the device features a debounced manual reset input. This allows for a manual override and reset initiation, providing additional system control flexibility.

The MAX793SESE+ features an adjustable reset threshold voltage, which allows the user to set the voltage level that triggers the reset. This is particularly useful for systems that operate at different voltages or have varying power supply tolerances. The reset timeout period is also programmable, offering designers the ability to customize the reset deassertion delay according to their system requirements.

With its small footprint, the MAX793SESE+ comes in a compact 16-pin narrow SO package. This space-saving design makes it ideal for use in systems where board space is at a premium. The device operates over a wide temperature range of -40°C to +85°C, ensuring reliability and performance under extreme conditions.

Key features of the MAX793SESE+ include:

• Programmable reset timeout delay
• Adjustable reset threshold voltage
• Debounced manual reset input
• Low supply current of 17µA (typical)
• Guaranteed reset valid to VCC = 1.2V
• Wide operating temperature range of -40°C to +85°C
• Compact 16-pin narrow SO package

In summary, the MAX793SESE+ from Maxim Integrated is a versatile and reliable supervisory circuit that offers enhanced protection for microprocessor systems. Its programmability and small size make it an excellent choice for a wide range of applications, including portable devices, computers, controllers, and intelligent instruments.