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| 4. Pin Function Description 1.General Description MDT7820ST D20 is a oltage etector hich M 87T v d w can generate a low level signal henever the w input ltage supply oltage) alls elow o v ( v f b threshold oltage level 2.0. v ( )v 1 2 V IN MDT7820ST23 V IN 3 3 VSS 2. Features V DET Low elbatcd egatlov 2.0V Low power consumption Built-in hysteresis characteristic 1 2 VSS 3. Applications V DET Battery etectors d Power checkers icro-controller reset M SV Pin ame N VDET O/I Function Ground S Open upply voltage Drain detector. Output low if Vin < 2.0V. Input upply voltage input S VIN ORDERING INFORMATION D e v ic e MD T78 20S T MD T78 20S T23 Paegakc SOT89 SOT23 This specification are subject to be changed without notice. Any latest information please preview P.1 2006/11 http;//www.mdtic.com.tw Ver 1.1 5. Electrical Characteristics Parameter Low Battery Detect Voltage (LBDV) Test Conditions Min. HI to LOW Detectable Voltage 1.9 LOW to HI Detectable Voltage --------------------------No load --------------------------VIN=2V 2.0 0.5 Typ. 2.0 2.1 0.1 2 1.2 9 Max. 2.1 2.2 0.15 5 7 Unit V V V uA V mA LBDV hysteresis Width Ivin Vin Operating Voltage VDET Sink Current 6.Application Circuit & Block Diagram This specification are subject to be changed without notice. Any latest information please preview P.2 2006/11 http;//www.mdtic.com.tw Ver 1.1 EXTERNAL COMPONENT : RPU=47K This specification are subject to be changed without notice. Any latest information please preview P.3 2006/11 http;//www.mdtic.com.tw Ver 1.1 |
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