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ADM6326-29ARTZ-R7 Datasheet(PDF) 1 Page - Analog Devices

Part # ADM6326-29ARTZ-R7
Description  Ultralow Power, 3-Lead, SOT-23 Microprocessor Reset Circuits
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADM6326-29ARTZ-R7 Datasheet(HTML) 1 Page - Analog Devices

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Ultralow Power, 3-Lead, SOT-23
Microprocessor Reset Circuits
ADM6326/ADM6328/ADM6346/ADM6348
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.
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
APPLICATIONS
Telecommunications
Microprocessor systems
Desktop and notebook computers
Portable equipment
FUNCTIONAL BLOCK DIAGRAMS
RESET
GENERATOR
(100ms)
ADM6326/ADM6346
VREF
VCC
GND
RESET
Figure 1.
RESET
GENERATOR
(100ms)
ADM6328/ADM6348
VREF
VCC
GND
RESET
Figure 2.
GENERAL DESCRIPTION
The ADM6326/ADM6328/ADM6346/ADM6348 devices provide
low cost solutions for protecting sensitive circuitry, such as micro-
processor 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,
portable equipment.
These devices provide a reset output during power-up, power-
down, and brownout conditions. On power-up, an internal
timer holds RESET asserted for at least 100 ms. This holds the
microprocessor in a reset state until conditions have stabilized.
The reset output remains operational with VCC as low as 1 V.
The ADM6326 and ADM6346 have an active low push-pull reset
output. The ADM6328 and ADM6348 have an active low open-
drain reset output, which requires an external pull-up resistor.
The ADM6326 and ADM6328 offer a choice of ten reset thresholds
in increments between 2.2 V and 3.08 V, whereas the ADM6346
and ADM6348 offer a choice of 14 reset thresholds between 3.3 V
and 4.63 V.
These devices are available in a 3-lead SOT-23 package and
operate over the extended temperature range of −40°C to +85°C.


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