Ultralow Power, 3-Lead, SOT-23 Microprocessor Reset Circuits Data Sheet ADM6326/ADM6328/ADM6346/ADM6348 FEATURES FUNCTIONAL BLOCK DIAGRAMS Ultralow supply current of 1 A maximum (ADM6326/ADM6328) ADM6326/ADM6346 Accurate monitoring of 2.5 V, 3 V, 3.3 V, and 5 V rails V CC RESET Reset thresholds available in increments from 2.2 V to 4.63 V GENERATOR RESET (100ms) Glitch immunity from negative-going V transients CC V REF 2 reset output options RESET Push-pull (ADM6326/ADM6346) RESET Open-drain (ADM6328/ADM6348) GND Minimum reset timeout of 100 ms Figure 1. Operating temperature range of 40C to +85C 3-lead SOT-23 package ADM6328/ADM6348 APPLICATIONS V CC RESET RESET GENERATOR Telecommunications (100ms) V REF Microprocessor systems Desktop and notebook computers Portable equipment GND Figure 2. GENERAL DESCRIPTION The ADM6326/ADM6328/ADM6346/ADM6348 devices provide microprocessor in a reset state until conditions have stabilized. low cost solutions for protecting sensitive circuitry, such as micro- The reset output remains operational with VCC as low as 1 V. processor and telecommunications circuitry. The ADM6326 and ADM6346 have an active low push-pull reset With built-in glitch immunity, ultralow supply currents, and output. The ADM6328 and ADM6348 have an active low open- 24 reset threshold voltage options, the ADM6326/ADM6328/ drain reset output, which requires an external pull-up resistor. ADM6346/ADM6348 not only ensure that systems are immune The ADM6326 and ADM6328 offer a choice of ten reset thresholds to fast transients on V , but also that the devices are suitable in increments between 2.2 V and 3.08 V, whereas the ADM6346 CC for monitoring a variety of supply voltages in low power, and ADM6348 offer a choice of 14 reset thresholds between 3.3 V portable equipment. and 4.63 V. Not all options are released for sale as standard models. See the Ordering Guide for details. These devices provide a reset output during power-up, power- down, and brownout conditions. On power-up, an internal These devices are available in a 3-lead SOT-23 package and RESET operate over the extended temperature range of 40C to +85C. timer holds asserted for at least 100 ms. This holds the Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20092018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 08052-001 08052-002ADM6326/ADM6328/ADM6346/ADM6348 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Pin Configuration and Function Descriptions ..............................5 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................6 Functional Block Diagrams ............................................................. 1 Theory of Operation .........................................................................7 General Description ......................................................................... 1 Reset Output ..................................................................................7 Revision History ............................................................................... 2 Interfacing to Other Devices .......................................................7 Specifications ..................................................................................... 3 Transient Immunity ......................................................................7 Absolute Maximum Ratings ............................................................ 4 Outline Dimensions ..........................................................................8 Thermal Resistance ...................................................................... 4 Ordering Guide .............................................................................9 ESD Caution .................................................................................. 4 REVISION HISTORY 5/2018Rev. A to Rev. B Changes to General Description Section ...................................... 1 Changes to Table 2 ............................................................................ 3 Added Note 1, Table 2 Renumbered Sequentially ....................... 3 Changes to Ordering Guide ............................................................ 9 6/2014Rev. 0 to Rev. A Changes to Figure 1 and Figure 2 ................................................... 1 9/2009Revision 0: Initial Version Rev. B Page 2 of 9