Quad Voltage Microprocessor Supervisory Circuit ADM6339 FEATURES FUNCTIONAL BLOCK DIAGRAM Accurate monitoring of up to four power supply voltages IN 1 IN 1 5V PULLUP 6 factory-set threshold options: 5.0 V, +1.8 V, +2.5 V, +3.0 V, IN 2 +3.3 V, and +5.0 V IN 2 Adjustable input threshold options: 0.5 V (2.0% accuracy), RESET +0.62 V (0.8% accuracy), and +1.23 V 200ms TIMEOUT 200 ms typical reset timeout IN 3 Open-drain RESET output (10 A internal pull-up) Reset output stage: active low, valid to IN = 1 V or IN = 1 V 1 2 IN 4 Low power consumption (55 A) Glitch immunity Specified from 40C to +85C ADM6339 V REF 6-lead SOT-23 package Figure 1. APPLICATIONS Telecommunications Microprocessor systems Data storage equipment Servers/workstations GENERAL DESCRIPTION active low output asserts, triggering a system reset. The output The ADM6339 is a high accuracy supervisory circuit capable of is open drain with a weak internal pull-up to the monitored IN2 monitoring up to four system supply voltages. supply of typically 10 A. After all voltages exceed the selected The ADM6339 incorporates a variety of internally pretrimmed threshold level, the reset signal remains low for the reset undervoltage threshold options for monitoring 5.0 V, +1.8 V, timeout period (200 ms typical). +2.5 V, +3.0 V, +3.3 V, and +5.0 V supply voltages. Tolerance levels The ADM6339 output remains valid as long as IN or IN exceeds of 5% and 10% are available. The device is also available 1 2 1 V. Unused monitored inputs should not be allowed to float or with one to three adjustable threshold options. The adjustable to be grounded instead, they should be connected to a supply voltage threshold options are +1.23 V, +0.62 V, and 0.5 V. See voltage greater than their specified threshold voltages. the Ordering Guide section for a list and description of all available options. The ADM6339 is available in a 6-lead SOT-23 package. The device operates over the extended temperature range of 40C If a monitored power supply voltage decreases below the mini- to +85C. mum voltage threshold (or rises above the maximum voltage threshold for the 0.5 V and 5.0 V input options), a single Rev. A 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 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 20092010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 08169-001ADM6339 TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................6 Applications ....................................................................................... 1 Theory of Operation .........................................................................8 Functional Block Diagram .............................................................. 1 Input Configuration ......................................................................8 General Description ......................................................................... 1 Monitoring Negative Voltages < 5.0 V .....................................8 Revision History ............................................................................... 2 User Adjustable Threshold Options ...........................................8 Specif icat ions ..................................................................................... 3 RESET Output Configuration .....................................................9 Absolute Maximum Ratings ............................................................ 4 Outline Dimensions ....................................................................... 10 ESD Caution .................................................................................. 4 Ordering Guide .......................................................................... 10 Pin Configuration and Function Descriptions ............................. 5 REVISION HISTORY 10/10Rev. 0 to Rev. A Added Figure 19 .............................................................................. 10 6/09Revision 0: Initial Version Rev. A Page 2 of 12