
Maxim Integrated
General Description
The MAX6715A–MAX6729A/MAX6797A are ultra-low-voltage microprocessor (μP) supervisory circuits designed to monitor two or three system power-supply voltages. These devices assert a system reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly improve system reliability and reduce size compared to separate ICs or discrete components.
FEATUREs
● VCC1 (Primary Supply) Reset Threshold Voltages
from 1.58V to 4.63V
● VCC2 (Secondary Supply) Reset Threshold Voltages
from 0.79V to 3.08V
● Externally Adjustable RSTIN Threshold for Auxiliary/
Triple-Voltage Monitoring (0.62V Internal Reference)
● Watchdog Timer Option
• 35s (min) Long Startup Period
• 1.12s (min) Normal Timeout Period
● Manual-Reset Input Option
● Power-Fail Input/Power-Fail Output Option
(Push-Pull and Open-Drain Active-Low)
● Guaranteed Reset Valid Down to VCC1 or
VCC2 = 0.8V
● Reset Output Logic Options
● Immune to Short VCC Transients
● Low Supply Current 14μA (typ) at 3.6V
● Watchdog Disable Feature
● Small 5, 6, and 8-Pin SOT23 Packages
● AEC-Q100 Qualified: MAX6719AUTTWD1/V+T
APPLICATIONs
● Multivoltage Systems
● Telecom/Networking Equipment
● Computers/Servers
● Portable/Battery-Operated Equipment
● Industrial Equipment
● Printers/Fax Machines
● Set-Top Boxes