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ADM8611VABKS-RL Datasheet(PDF) 1 Page - Analog Devices |
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ADM8611VABKS-RL Datasheet(HTML) 1 Page - Analog Devices |
1 / 7 page Low-Voltage Manual Reset & Watchdog Supervisory Circuits in 4-Lead SC70 Preliminary Technical Data ADM8611/ADM8616/ADM8617/ADM8618 Rev. PrB 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES Precision 1.8V to 5V Power Supply Monitoring 9 Reset Threshold Options: 1.58V to 4.63V 140ms (Min) Reset Timeout Manual Reset Input (ADM8611) Watchdog Timer (ADM8616–ADM8618) Reset Output Stages Push-Pull Active-Low Open-Drain Active-Low Push-Pull Active-High Low Power Consumption (3µA) Guaranteed Reset Output valid to VCC=1V 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 GENERAL DESCRIPTION The ADM8611/ADM8616/ADM8617/ADM8618 are supervisory circuits which 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 ADM8611’s debounced manual reset input can be used to initiate a reset by means of an external push-button or logic signal. The ADM8616–ADM8618 have an on-chip watchdog timer which can reset the microprocessor if it fails to strobe within a preset timeout period. FUNCTIONAL BLOCK DIAGRAMS RESET GENERATOR GND RESET VCC VREF VCC ADM8616 WATCHDOG DETECTOR WDI Figure 1. Each part is available in a choice of the following 9 reset threshold options: 1.58V, 1.67V, 2.19V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V and 4.63V. The reset timeout periods are 20ms (min) and 140ms (min) for the ADM8611 and ADM8616– ADM8618, respectively. The watchdog timeout period is 1.6s (typ). The parts differ in terms of reset output configuration, as indicated in table 1. The ADM8611/ADM8616/ADM8617/ADM8618 are available in 4-lead SC70 packages and typically consume only 3µA, making them suitable for use in low power portable applications. Table 1. Selection Table Output Stage Part No. Manual Reset Watchdog RESET RESET ADM8611 Yes - Push-Pull ADM8616 - Yes Push-Pull ADM8617 - Yes Open-Drain ADM8618 - Yes Push-Pull |
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