Maxim Integrated's MAX815LCPA Microprocessor Supervisory Circuit

The MAX815LCPA from Maxim Integrated 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 with +5V-powered circuits.

This supervisory circuit ensures that the microprocessor is reset to a known state during power-up, power-down, and brown-out conditions. The MAX815LCPA features an active-low reset signal, which remains asserted for a minimum of 140ms after VCC has risen above the reset threshold level. This ensures that the µP has sufficient time to stabilize and start up correctly every time the power supply is turned on or restored after a failure.

Key features of the MAX815LCPA include:

• Guaranteed Reset Valid to VCC = 1V
• No External Components Required
• Precision VCC Monitor for 5V Power Supplies
• 140ms min Power-On Reset Pulse Width
• 200ms min Manual Reset Pulse Width
• Active-Low, Push-Pull Reset Output
• Temperature Range: 0°C to +70°C
• 8-Pin DIP or SO Package Options

The device is particularly useful in systems where correct operation is critical and requires a reliable initialization during power-up or recovery from a power failure. Its push-pull output stage drives the reset signal actively to the high and low logic levels, ensuring a solid reset assertion even in noisy environments.

With its compact 8-pin DIP or SO packaging, the MAX815LCPA is easy to integrate into a variety of digital systems, from simple microcontrollers to complex microprocessors. It is a versatile component that can be employed in computers, controllers, intelligent instruments, and critical monitoring systems where precise power monitoring is essential for the integrity of the operation.

Maxim Integrated's commitment to quality and reliability is evident in the MAX815LCPA, making it a smart choice for designers looking to enhance system stability and performance.