Maxim Integrated MAX6315US26D3-T Microprocessor Reset Circuit

The MAX6315US26D3-T is a highly reliable, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. Manufactured by Maxim Integrated, this device 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 µP is reset to a known state during power-up, power-down, or brown-out conditions. The MAX6315US26D3-T features an active-low RESET output, which remains asserted for a minimum of 140ms after V_CC has risen above the reset threshold level. This ensures that the system has sufficient time to stabilize before the processor starts operating.

The reset threshold voltage for the MAX6315US26D3-T is preset at the factory to 2.63V, which is suitable for operation with a nominal 2.7V power supply. This precision voltage monitoring helps safeguard against unpredictable system behavior caused by low voltage conditions. The device operates with a supply voltage range from 1.2V to 5.5V, making it versatile for various applications.

Designed for low-power consumption, the MAX6315US26D3-T draws a quiescent current of only 1µA, making it ideal for portable and battery-powered equipment. The small footprint of the SOT-143 package allows for efficient use of board space, which is critical in space-constrained applications.

Key features of the MAX6315US26D3-T include:

• Factory-preset reset threshold voltage of 2.63V
• Guaranteed reset valid to V_CC = 1.2V
• Low power consumption: 1µA supply current
• 140ms minimum reset pulse width
• No external components required
• Immune to short V_CC transients
• Available in a compact SOT-143 package

Overall, the MAX6315US26D3-T from Maxim Integrated is an excellent choice for designers who require a compact, reliable, and low-power reset circuit for their microprocessor-based systems. Its ease of integration and robust feature set ensure that it will maintain system stability under a variety of power conditions.