Triple Processor Supervisors ADM13307 FEATURES FUNCTIONAL BLOCK DIAGRAMS Triple supervisory circuits ADM13307-18 ADM13307-25 Supply voltage range of 2.0 V to 5.5 V V ADM13307-33 DD Pretrimmed threshold options: 1.8 V, 2.5 V, 3.3 V, and 5 V 14k Adjustable 0.6 V and 1.25 V voltage references MR Maximum supply current of 40 A RESET 140 ms (minimum) reset timeout SENSE1 RESET R1 RESET valid from V 1.1 V R2 LOGIC + TIMER DD Push-pull RESET and RESET outputs RESET SENSE2 8-lead, narrow body SOIC package R3 R4 Temperature range: 40C to +85C GND APPLICATIONS 1.25V OSCILLATOR Supervising DSPs/microcontrollers Industrial and portable equipment SENSE3 Wireless systems Notebook/desktop computers Figure 1. GENERAL DESCRIPTION The ADM13307 is a triple voltage supervisor designed to monitor up to three voltage levels in DSP and microprocessor- ADM13307-4 V DD ADM13307-5 based systems. 14k There are five models available, all of which feature a combina- MR tion of internally pretrimmed undervoltage threshold options RESET SENSE1 for monitoring 1.8 V, 2.5 V, 3.3 V, and 5 V supplies. There are RESET R1 R2 LOGIC + TIMER also two adjustable input options with undervoltage thresholds of GND either 0.6 V or 1.25 V. RESET The ADM13307-18, ADM13307-25, and ADM13307-33 SENSE2 models have two internally fixed thresholds and one externally programmable threshold via a resistor string. The ADM13307-4 0.6V OSCILLATOR and ADM13307-5 offer one internally fixed threshold and two externally programmable thresholds. See the Ordering Guide SENSE3 for a list of all available options. During power-up, is asserted when the supply voltage RESET Figure 2. exceeds 1.1 V. The device then monitors the SENSEv input pins and holds the RESET output low as long as the SENSEv pins remain below the rising threshold voltage, V . IT+ The ADM13307 features both an active high RESET and an Once the supplies monitored at the SENSEv inputs rise above active low RESET output. their associated thresholds, the reset signal remains low for the The manual reset input of the ADM13307 can be used to initiate reset timeout period before deasserting. Subsequently, if a volt- a reset by means of an external push button or logic signal. age monitored by the SENSEv pins falls below its associated The ADM13307 is available in an 8-lead narrow body SOIC falling input threshold voltage, V , the output asserts. IT RESET package. The device operates over the extended industrial temperature range of 40C to +85C. Rev. 0 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 2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 06923-001 06923-002ADM13307 TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Resistance .......................................................................6 Applications ....................................................................................... 1 ESD Caution...................................................................................6 General Description ......................................................................... 1 Pin Configuration and Function Descriptions ..............................7 Functional Block Diagrams ............................................................. 1 Typical Performance Characteristics ..............................................8 Revision History ............................................................................... 2 Theory of Operation ...................................................................... 10 Specif icat ions ..................................................................................... 3 Input Configuration ................................................................... 10 Timing Requirements .................................................................. 5 Reset Output ............................................................................... 10 Switching Characteristics ............................................................ 5 MR Manual Reset ( ) .................................................................... 10 Functional Truth Table ................................................................ 5 Outline Dimensions ....................................................................... 11 Absolute Maximum Ratings ............................................................ 6 Ordering Guide .......................................................................... 11 REVISION HISTORY 8/07Revision 0: Initial Version Rev. 0 Page 2 of 12