Ultralow Power, 3-Lead, SOT-23 Microprocessor Reset Circuits ADM6326/ADM6328/ADM6346/ADM6348
FEATURES
Ultralow supply cu...
Ultralow Power, 3-Lead, SOT-23 Microprocessor Reset Circuits ADM6326/ADM6328/ADM6346/ADM6348
FEATURES
Ultralow supply current of 1 μA maximum (ADM6326/ADM6328) Accurate monitoring of 2.5 V, 3 V, 3.3 V, and 5 V rails Reset thresholds available in increments from 2.2 V to 4.63 V Glitch immunity from negative-going VCC transients 2 reset output options Push-pull RESET (ADM6326/ADM6346) Open-drain RESET (ADM6328/ADM6348) Minimum reset timeout of 100 ms Operating temperature range of −40°C to +85°C 3-lead SOT-23 package
FUNCTIONAL BLOCK DIAGRAMS
ADM6326/ADM6346
VCC VREF RESET GENERATOR (100ms)
RESET
GND
Figure 1.
ADM6328/ADM6348
VCC VREF RESET GENERATOR (100ms) RESET
APPLICATIONS
Telecommunications Microprocessor systems Desktop and notebook computers Portable equipment
GND
Figure 2.
GENERAL DESCRIPTION
The ADM6326/ADM6328/ADM6346/ADM6348 devices provide low cost solutions for protecting sensitive circuitry, such as microprocessor and telecommunications circuitry. With built-in glitch immunity, ultralow supply currents, and 24 reset threshold
voltage options, the ADM6326/ADM6328/ ADM6346/ADM6348 not only ensure that systems are immune to fast transients on VCC, but also that the devices are suitable for monitoring a variety of supply
voltages in low power, www.DataSheet4U.com portable equipment. These devices provide a reset output during power-up, powerdown, and brownout conditions. On power-up, an internal timer holds RESET asserted for at least 100 ms. This holds the m...