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ADM6321CW50ARJR7 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADM6321CW50ARJR7 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 16 page Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 Data Sheet ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322 Rev. F Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2004–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 26 reset threshold options 2.5 V to 5 V in 100 mV increments 4 reset timeout options 1 ms, 20 ms, 140 ms, and 1120 ms (minimum) 4 watchdog timeout options 6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical) Manual reset input Reset output stages Push-pull active low Open-drain active low Push-pull active high Low power consumption: 5 µA Guaranteed reset output valid to VCC = 1 V Power supply glitch immunity Specified over industrial temperature range 5-lead SOT-23 package APPLICATIONS Microprocessor systems Computers Controllers Intelligent instruments Portable equipment FUNCTIONAL BLOCK DIAGRAMS ADM6316 VCC VCC MR GND WDI RESET RESET GENERATOR WATCHDOG DETECTOR DEBOUNCE VREF Figure 1. ADM6320 VCC MR GND WDI RESET RESET GENERATOR WATCHDOG DETECTOR DEBOUNCE VREF Figure 2. GENERAL DESCRIPTION The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ ADM6321/ADM6322 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. As well as providing power- on reset signals, an on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. A reset signal can also be asserted by an external push button through a manual reset input. The seven parts feature different combinations of watchdog input, manual reset input, and output stage configuration, as shown in Table 1. Each part is available in a choice of 26 reset threshold options ranging from 2.5 V to 5 V in 100 mV increments. There are also four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms (minimum) and four watchdog timeout options of 6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical). The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ ADM6321/ADM6322 are available in 5-lead SOT-23 packages and typically consume only 3 µA, making them suitable for use in low power portable applications. Table 1. Selection Table Part No. Watchdog Manual Reset Output Stage RESET RESET ADM6316 Yes Yes Push-pull No ADM6317 Yes Yes No Push-pull 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 |
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