Microprocessor Supervisory Circuit in 4-Lead SC70 Data Sheet ADM6711/ADM6713 FEATURES FUNCTIONAL BLOCK DIAGRAMS Specified over temperature ADM6711 Low power consumption (12 A) V Precision monitoring of 2.5 V, 3 V, 3.3 V, RESET CC GENERATOR RESET and 5 V power supply voltages 240ms V REF Reset timeout period of 140 ms (minimum) Manual reset input MR DEBOUNCE GND Output stages Push-pull RESET output (ADM6711) Figure 1. Open-drain RESET output (ADM6713) Reset assertion down to 1 V V CC ADM6713 Power supply glitch immunity 4-lead SC70 package V CC RESET GENERATOR RESET V 240ms REF APPLICATIONS Microprocessor systems Computers MR DEBOUNCE GND Controllers Intelligent instruments Figure 2. Automotive systems GENERAL DESCRIPTION The ADM6711/ADM6713 are reset generator circuits suitable The parts are highly reliable with accurate voltage references for use in microprocessor-based systems. They provide a reset and immunity to fast, negative-going transients on VCC. Low signal on power-up, power-down, and whenever the supply current consumption and space-efficient, 4-lead SC70 packaging voltage falls below a preset threshold. In addition, both parts make the ADM6711/ADM6713 ideal for use in low power have a debounced manual reset input so that a reset signal can portable applications. also be initiated with an external switch or logic signal. With six different reset threshold options available ranging from V V CC *R CC PULL-UP 2.32 V to 4.63 V, the ADM6711/ADM6713 are suitable for MICROPROCESSOR ADM6711/ monitoring 2.5 V, 3 V, 3.3 V, and 5 V supplies. A reset timeout SYSTEM ADM6713 of at least 140 ms occurs when VCC rises above the threshold. MR RESET RESET This gives the supply voltage time to stabilize before the microprocessor starts up. GND GND The ADM6711 has a push-pull output, so no additional external *ADM6713 ONLY components are needed. The ADM6713 open-drain output Figure 3. Typical Operating Circuit requires an external pull-up resistor that can be connected to a voltage higher than VCC, if desired. Rev. B 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 20062011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 03754-002 03754-001 03754-011ADM6711/ADM6713 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications....................................................................................... 1 Circuit Description............................................................................8 Functional Block Diagrams............................................................. 1 Manual Reset Input.......................................................................8 General Description ......................................................................... 1 Power Supply Glitch Immunity...................................................8 Revision History ............................................................................... 2 ADM6713 RESET Output Logic Levels .....................................8 Specifications..................................................................................... 3 Ensuring a Valid RESET Output Down To VCC = 0 V ............8 Absolute Maximum Ratings............................................................ 5 Outline Dimensions..........................................................................9 ESD Caution.................................................................................. 5 Ordering Guide .............................................................................9 Pin Configuration and Function Descriptions............................. 6 REVISION HISTORY 9/11Rev. A to Rev. B Changes to Input Threshold Parameter, Table 1 .......................... 4 Updated Outline Dimensions ......................................................... 9 12/06Rev. 0 to Rev. A Updated Format..................................................................Universal Changes to Specifications Table...................................................... 3 Changes to Figure 10........................................................................ 8 Changes to Ordering Guide ............................................................ 9 8/03Revision 0: Initial Version Rev. B Page 2 of 12