LTC1726
Triple Supply Monitor and
ВµP Supervisor with Adjustable
Reset and Watchdog Timer
Features Description Monitors Three Inputs Simultaneously LTC1726-5: 5V, 3.3V and ADJ LTC1726-2.5: 2.5V, 3.3V and ADJ
n В±1.5% Threshold Accuracy Over Temperature
n Low Supply Current: 16ВµA Typ
n Adjustable Reset Timeout
n Adjustable Watchdog Timeout
n Active Low Open-Drain Reset Output
n Power Supply Glitch Immunity
n Guaranteed RESET for V
CC3 ≥ 1V or VCC25/VCC5 ≥ 1V
n MS8 and SO-8 Packages The LTCВ®1726 is a triple supply monitor and microprocessor supervisory circuit with adjustable reset and watchdog
functions intended for systems with multiple supply voltages. The part has a common open-drain reset output
with an adjustable delay. The reset and watchdog time-out
periods are both adjustable using external capacitors. n Applications n n n n n Tight 1.5% accuracy specifications and glitch immunity
ensure reliable reset operation without false triggering.
The RST output is guaranteed to be in the correct state for
VCC5/VCC25 or VCC3 down to 1V. The LTC1726 may also be
configured to monitor any one or two VCC inputs instead
of three, depending on system requirements.
The low (16ВµA typical) supply current makes the LTC1726 …