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ST485ECN Folha de dados(PDF) 3 Page - STMicroelectronics |
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ST485ECN Folha de dados(HTML) 3 Page - STMicroelectronics |
3 / 13 page ST485E 3/13 ESD PERFORMANCE: TRANSMITTER OUTPUTS, RECEIVER INPUTS DC ELECTRICAL CHARACTERISTICS (VCC =5V ± 5%, TA =TMIN to TMAX , unless otherwise specified. Typical values are referred to TA = 25°C) (See Note 1) Note 1: All currents into device pins are positive; all cuttents out of device pins are negative; all voltages are referenced to device ground unless specified. Note 2: Supply current specification is valid for loaded transmitters when VDE =0V Note 3: Applies to peak current. See typical Operating Characteristics. Symbol Parameter Test Conditions Min. Typ. Max. Unit ESD ESD Protection Voltage Human Body Model ±15 KV ESD ESD Protection Voltage IEC-1000-4-2 ±8KV Symbol Parameter Test Conditions Min. Typ. Max. Unit VOD1 Differential Driver Output (No Load) 5V VOD2 Differential Driver Output (With Load) RL =27Ω (RS-485) (See Fig. 1) RL =50Ω (RS-422) (See Fig. 1) 1.5 5 5 V V ∆V OD Change in Magnitude of Driver Differential Output Voltage for Complementary Output States RL =27Ω or 50Ω (See Fig. 1) 0.2 V VOC Driver Common-Mode Output Voltage RL =27Ω or 50Ω (See Fig. 1) 3 V ∆V OC Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States RL =27Ω or 50Ω (See Fig. 1) 0.2 V VIH Input High Voltage RE, DE, DI 2.0 V VIL Input Low Voltage RE, DE, DI 0.8 V IIN1 Input Current RE, DE, DI ± 2 µA IIN2 Input Current (A, B) VCM = 0V or 5.25V VDE =0V VIN = 12V VIN = -7V 1 -0.8 mA mA VTH Receiver Differential Threshold Voltage VCM = -7 to 12V -0.2 0.2 V ∆V TH Receiver Input Hysteresis VCM =0V 70 mV VOH Receiver Output High Voltage IO = -4mA VID = 200mV 3.5 V VOL Receiver Output Low Voltage IO =4mA VID = -200mV 0.4 V IOZR 3-State (High Impedance) Output Current at Receiver VO = 0.4 to 2.4V ± 1 µA RIN Receiver Input Resistance VCM = -7 to 12V 24 K Ω ICC No Load Supply Current (Note 2) VRE =0V orVCC VDE =VCC VDE =0V 400 300 900 500 µA µA IOSD1 Driver Short-Circuit Current, VO=High VO = -7 to 12V (Note 3) 35 250 mA IOSD2 Driver Short-Circuit Current, VO=Low VO = -7 to 12V (Note 3) 35 250 mA IOSR Receiver Short-Circuit Current VO =0V toVCC 795 mA |
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