Maxim Integrated MAX817LCSA+T Microprocessor Supervisory Circuits

The MAX817LCSA+T from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to maintain system integrity in the event of power fluctuations or failures. This essential component is engineered to monitor power supplies in µP and digital systems, providing a significant layer of protection and stability. It is an ideal choice for a wide range of applications, including computers, controllers, and intelligent instruments.

One of the standout features of the MAX817LCSA+T is its ability to assert a reset signal to the µP during power-up, power-down, and brown-out conditions. The reset output remains operational with VCC as low as 1V, ensuring that the µP resets properly during low voltage conditions. This feature helps to prevent system errors and data corruption that can occur during unpredictable power events.

The device comes in a compact 8-pin SOIC package, making it suitable for space-constrained applications. It has an operating temperature range of -40°C to +85°C, allowing it to function reliably in a variety of environmental conditions. Additionally, the MAX817LCSA+T offers a low supply current of 17µA (typical), which is beneficial for power-sensitive designs.

Key specifications of the MAX817LCSA+T include:

• Supply Voltage Monitoring Range: 4.65V
• Reset Timeout Period: 140ms (min)
• Watchdog Timeout Period: 1.6s (min)
• Manual Reset Input: Yes

The device also features a watchdog timer that periodically checks for system malfunctions. If the µP fails to provide a regular kicking signal, the watchdog timer will issue a system reset, prompting a safe recovery from a failure state. The inclusion of a manual reset input allows for an external trigger to initiate a system reset, providing additional flexibility and control for system maintenance and troubleshooting.

With its robust feature set and Maxim Integrated's reputation for quality, the MAX817LCSA+T is an excellent choice for designers looking to enhance system reliability and safeguard against the risks associated with power supply instability.