MAX6700 Datasheet

• Monitor Up to Four Power-Supply Voltages
• Precision Factory-Set Reset Threshold Options for 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V Supplies
• Adjustable Voltage Threshold Monitors Down to 0.62V with 1.5% Accuracy
• Low 35μA Supply Current
• Open-Drain RESET Output with 10μA Internal Pullup
• 5μs Propagation Delay (MAX6700)
• RESET Valid to IN1 = 1V or IN2 = 1V
• Immune to Short Monitored Supply Transients
• Guaranteed from −40°C to 105°C
• Small 6-Pin SOT23 Package

• Data Storage Equipment
• Desktop and Notebook Computers
• High-End Printers
• Industrial Equipment
• Networking Equipment
• Servers and Workstations
• Set-Top Boxes
• Telecommunications

The MAX6700 precision triple/quad voltage microprocessor (µP) supervisory circuits monitor up to four system-supply voltages and assert a single reset if any supply voltage drops below its preset threshold. These devices significantly reduce system size and component count while improving reliability compared to separate ICs or discrete components.

A variety of factory-trimmed threshold voltages are available to accommodate different supply voltages and tolerances with minimal external component requirements. The MAX6700 monitors three voltages with adjustable thresholds down to 0.62V.

A single active-low output asserts when any monitored input falls below its associated threshold. The open-drain output has a weak internal pullup (10µA) to IN2. For the MAX6710, reset remains low for the reset timeout period (140ms min) after all voltages rise above the selected threshold. The MAX6700 acts as a voltage detector with a propagation delay of 5µs after all monitored voltages exceed their thresholds. The output remains valid as long as either IN2 or IN2 input voltage remains above 1V (MAX6710) or V_CC is above 2V (MAX6700/MAX6710Q).

The MAX6700 are available in a small 6-pin SOT23 package and operate over the extended (−40°C to 105°C) temperature range.