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ADM8616TCYAKSZ-RL72 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADM8616TCYAKSZ-RL72 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 12 page Low Voltage Supervisory Circuits with Watchdog in 4-Lead SC70 ADM8616/ADM8617 Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other 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 www.analog.com Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved. FEATURES Precision 1.8 V to 5 V power supply monitoring 9 RESET threshold options 1.58 V to 4.63 V 4 RESET timeout options 1 ms, 20 ms, 140 ms, 1120 ms 3 watchdog timeout options 6.3 ms, 102 ms, 1.6 sec RESET output stages Push-pull active-low (ADM8616) Open-drain active-low (ADM8617) Low power consumption (5 μA) Guaranteed reset output valid to VCC = 1 V Power supply glitch immunity Specified over −40°C to +85°C temperature range 4-lead SC70 package APPLICATIONS Microprocessor systems Computers Controllers Intelligent instruments Portable equipment FUNCTIONAL BLOCK DIAGRAM ADM8616 VCC VCC GND WDI RESET RESET GENERATOR WATCHDOG DETECTOR VREF Figure 1. GENERAL DESCRIPTION The ADM8616/ADM8617 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. A power-on reset signal is generated when the supply voltage rises to a preset threshold level. The ADM8616/ADM8617 have an on-chip watchdog timer that can reset the microprocessor if it fails to strobe within a preset timeout period. Each part is available in the following nine reset threshold options: 1.58 V, 1.67 V, 2.19 V, 2.32 V, 2.63 V, 2.93 V, 3.08 V, 4.38 V, and 4.63 V. There are four reset timeout options: 1 ms, 20 ms, 140 ms, and 1120 ms. There are also three possible watchdog timeouts available: 6.3 ms, 102 ms, and 1.6 sec. The parts differ in terms of reset output configuration. The ADM8616 is active-low with a push-pull output, while the ADM8617 is active-low with an open-drain output. The ADM8616/ADM8617 are available in 4-lead SC70 packages and typically consume only 5 μA, making them suitable for use in low power, portable applications. |
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