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ADM709LAN bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADM709LAN bảng dữ liệu(HTML) 1 Page - Analog Devices |
1 / 4 page FUNCTIONAL BLOCK DIAGRAM VCC RESET ADM709 VTH RESET GENERATOR GND RESET ADM709 GND GND µP RESET VCC VCC Typical Operating Circuit ORDERING GUIDE Reset Temperature Package Model Threshold Range Option* ADM709LAN 4.65 V –40 °C to +85°C N-8 ADM709LAR 4.65 V –40 °C to +85°C SO-8 ADM709MAN 4.40 V –40 °C to +85°C N-8 ADM709MAR 4.40 V –40 °C to +85°C SO-8 ADM709TAN 3.08 V –40 °C to +85°C N-8 ADM709TAR 3.08 V –40 °C to +85°C SO-8 ADM709SAN 2.93 V –40 °C to +85°C N-8 ADM709SAR 2.93 V –40 °C to +85°C SO-8 ADM709RAN 2.63 V –40 °C to +85°C N-8 ADM709RAR 2.63 V –40 °C to +85°C SO-8 *N = Plastic DIP; SO = SOIC. 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 Power Supply Monitor with Reset ADM709 © Analog Devices, Inc., 1995 One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 GENERAL DESCRIPTION The ADM709 contains a power supply monitor which generates a system reset during power-up, power-down and brownout conditions. When VCC falls below the reset threshold, RESET goes low and holds the µP in reset. On power-up the RESET output is held low for 140 ms after VCC rises above the thresh- old. The RESET output remains operational with VCC as low as 1 V. Three supply-voltage threshold levels are available suitable for +5 V, +3.3 V and for +3 V supply monitoring. The actual reset voltage threshold is given below. The ADM709 is available in 8-pin DIP and SOIC packages. Table I. Reset Threshold Suffix Voltage (V) L 4.65 M 4.40 T 3.08 S 2.93 R 2.63 FEATURES Precision Supply Voltage Monitor +5 V, +3.3 V, +3 V Power Supply Monitor 35 A Quiescent Current 140 ms (min) Power-On Reset Pulse Low Cost 8-Pin DIP/SO Packages Upgrade for MAX709 APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Critical P Monitoring Automotive Systems Critical P Power Monitoring |
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