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L9779WD 数据表(PDF) 97 Page - STMicroelectronics |
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L9779WD 数据表(HTML) 97 Page - STMicroelectronics |
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97 / 170 page  DocID027452 Rev 5 97/170 L9779WD Functional description 169 CAN_H CAN_L VCANHdom CANH voltage level in dominant state Active mode; VTXCAN = VTXCANLOW; RL = 60 Ω 2.75 - 4.5 V VCANLdom CANL voltage level in dominant state 0.5 - 2.25 V VDIFF,domOUT Differential output voltage in dominant state: VCANHdom- VCANLdom 1.5 - 3 V VCM Driver symmetry: VCANHdom+VCANLdom RL = 60 Ω; CSPLIT = 4.7 nF; 0.9* VCANSUP VCANSUP 1.1* VCANSUP V VCANHrec CANH voltage level in recessive state VTX_CAN = VTX_CANHIGH; No load 22.5 3 V VCANLrec CANL voltage level in recessive state 22.5 3 V VDIFF,recOUT Differential output voltage in recessive state: VCANHrec- VCANLrec -50 - 50 mV VCANHL,CM Common mode bus voltage Application info: Measured with respect to the ground of each CAN node -12 - +12 V IOCANH,dom CANH output current in dominant state Active mode; VTX_CAN = VTX_CANLOW; VCANH = 0 V -100 -75 -45 mA IOCANL,dom CANL output current in dominant state Active mode; VTX_CAN = VTX_CANLOW; VCANL = 5 V 45 75 100 mA ILeakage Input leakage current Unpowered device; VBUS = 5 V 0 - 250 µA Rin Internal resistance Active mode VTX_CAN = VTX_CANHIGH; No load 25 - 45 kΩ Rin,diff Differential internal resistance Active mode & STBY mode; VTX_CAN = VTX_CANHIGH; No load 50 - 85 kΩ Cin Internal capacitance Guaranteed by design - 20 - pF Cin,diff Differential internal capacitance Guaranteed by design - 10 - pF VTHdom Differential receiver threshold voltage recessive to dominant state Active mode - - 0.9 V Table 42. CAN transceiver electrical characteristics (continued) Pin Symbol Description Test conditions Min Typ Max Unit |
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