Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 Data Sheet ADM6316/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 FEATURES FUNCTIONAL BLOCK DIAGRAMS 26 reset threshold options ADM6316 2.5 V to 5 V in 100 mV increments V CC 4 reset timeout options V CC 1 ms, 20 ms, 140 ms, and 1120 ms (minimum) RESET RESET GENERATOR V 4 watchdog timeout options REF 6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical) MR DEBOUNCE Manual reset input WATCHDOG Reset output stages DETECTOR Push-pull active low Open-drain active low GND WDI Push-pull active high Figure 1. Low power consumption: 5 A Guaranteed reset output valid to VCC = 1 V ADM6320 Power supply glitch immunity Specified over industrial temperature range V CC 5-lead SOT-23 package RESET RESET GENERATOR V REF APPLICATIONS Microprocessor systems DEBOUNCE MR Computers WATCHDOG DETECTOR Controllers Intelligent instruments Portable equipment GND WDI Figure 2. GENERAL DESCRIPTION The ADM6316/ADM6318/ADM6319/ADM6320/ADM6321/ Each device is available in a choice of 26 reset threshold options ADM6322 are supervisory circuits that monitor power supply ranging from 2.5 V to 5 V in 100 mV increments. There are also voltage levels and code execution integrity in microprocessor- four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms based systems. As well as providing power-on reset signals, an (minimum) and four watchdog timeout options of 6.3 ms, 102 ms, on-chip watchdog timer can reset the microprocessor if it fails 1600 ms, and 25.6 sec (typical). Not all device options are released to strobe within a preset timeout period. A reset signal can also for sale as standard models. See the Ordering Guide for details. be asserted by an external push button through a manual reset The ADM6316/ADM6318/ADM6319/ADM6320/ADM6321/ input. The seven devices feature different combinations of ADM6322 are available in 5-lead SOT-23 packages and watchdog input, manual reset input, and output stage typically consume only 3 A, making them suitable for use in configuration, as shown in Table 1. low power portable applications. Table 1. Selection Table Output Stage RESET Part No. Watchdog Manual Reset RESET ADM6316 Yes Yes Push-pull No ADM6318 Yes No Push-pull Push-pull ADM6319 No Yes Push-pull Push-pull ADM6320 Yes Yes Open-drain No ADM6321 Yes No Open-drain Push-pull ADM6322 No Yes Open-drain Push-pull Rev. J 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. 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Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 04533-028 0 45 33 -0 01ADM6316/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Open-Drain RESET Output ........................................................9 Applications ....................................................................................... 1 Manual Reset Input .......................................................................9 Functional Block Diagrams ............................................................. 1 Watchdog Input .............................................................................9 General Description ......................................................................... 1 Applications Information .............................................................. 10 Revision History ............................................................................... 2 Watchdog Input Current ........................................................... 10 Specif icat ions ..................................................................................... 3 Negative Going V Transients ................................................. 10 CC Absolute Maximum Ratings ............................................................ 5 Ensuring Reset Valid to V = 0 V ........................................... 10 CC ESD Caution .................................................................................. 5 Watchdog Software Considerations ......................................... 10 Pin Configurations and Function Descriptions ........................... 6 Device Model Options ................................................................... 11 Typical Performance Characteristics ............................................. 7 Outline Dimensions ....................................................................... 13 Circuit Description ........................................................................... 9 Ordering Guide .......................................................................... 13 Reset Output ................................................................................. 9 REVISION HISTORY 7/2018Rev. I to Rev. J 10/2010Rev. D to Rev. E Changes to Table 8 .......................................................................... 12 Deleted ADM6317 ......................................................... Throughout Deleted Figure 4, Renumbered Sequentially ................................. 6 Updated Outline Dimensions ....................................................... 13 Changes to Table 4 ............................................................................ 6 Changes to Ordering Guide .......................................................... 13 8/2008Rev. C to Rev. D Change to Figure 18 .......................................................................... 9 3/2018Rev. H to Rev. I Changes to General Description Section ...................................... 1 4/2007Rev. B to Rev. C Added Note 1, Table 2 ...................................................................... 3 Added Figure 2 .................................................................................. 1 Changes to Figure 23...................................................................... 13 Changed Model Options Section to Device Model Options Section .............................................................................................. 11 Changes to Ordering Guide .......................................................... 13 Changes to Device Model Options Section and Table 5 ........... 11 Deleted Table 8 Renumbered Sequentially ................................ 12 1/2007Rev. A to Rev. B Changes to Ordering Guide .......................................................... 13 Changes to Functional Block Diagram ........................................... 1 Changes to Figure 18...................................................................... 10 12/2015Rev. G to Rev. H Added Endnote 1 and Endnote 2, Table 2 ..................................... 3 5/2006Rev. 0 to Rev. A Updated Format .................................................................. Universal Change to Model Options Section Title ...................................... 11 Added Endnote 1, Table 5 ............................................................. 11 Changes to Functional Block Diagram ........................................... 1 Changes to Table 8 .......................................................................... 12 Changes to Table 8 .......................................................................... 12 Changes to Ordering Guide .......................................................... 14 Changes to Figure 22...................................................................... 13 Changes to Ordering Guide .......................................................... 13 1/2015Rev. F to Rev. G Changes to Table 8 .......................................................................... 12 10/2004Revision 0: Initial Version 5/2013Rev. E to Rev. F Changes to Table 8 .......................................................................... 12 Changes to Ordering Guide .......................................................... 13 Rev. J Page 2 of 14