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ADM809-5L Arkusz danych(PDF) 1 Page - Analog Devices |
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ADM809-5L Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 6 page REV. 0 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a ADM809-5S/L One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2000 Microprocessor Supervisory Circuit FUNCTIONAL BLOCK DIAGRAM VREF VCC RESET GENERATOR 55ms ADM809-5S/L RESET GND FEATURES Specified Over Temperature Low Power Consumption (17 A) Precision Voltage Monitor: 3 V, 5 V Options Reset Assertion Down to 1 V VCC 30 ms min Power-On Reset Logic Low RESET Output APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Automotive Systems GENERAL DESCRIPTION The ADM809-5S/L supervisory circuits monitor the power supply voltage in microprocessor systems. It provides a reset output during power-up, power-down and brownout conditions. On power-up, an internal timer holds reset asserted for 55 ms. This holds the microprocessor in a reset state until conditions have stabilized. The RESET output remains operational with VCC as low as 1 V. The ADM809-5S/L provides an active low reset signal ( RESET). The reset comparator features built-in glitch immunity, making it immune to fast transients on VCC. The ADM809-5S/L consumes only 17 µA, making it suitable for low power portable equipment. RESET RESET INPUT GND GND VCC VCC P SYSTEM ADM809-5S/L VCC Figure 1. Typical Operating Circuit |
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