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ST485EBD Scheda tecnica(PDF) 6 Page - STMicroelectronics |
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ST485EBD Scheda tecnica(HTML) 6 Page - STMicroelectronics |
6 / 18 page Electrical characteristics ST485EB - ST485EC - ST485EX 6/18 4 Electrical characteristics Table 6. ESD performance: transmitter outputs, receiver inputs 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 Table 7. DC electrical characteristics (VCC = 5 V ± 5 %, TA = TMIN to TMAX, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions (1) Min. Typ. Max. Unit VOD1 Differential driver output (no load) 5V VOD2 Differential driver output (with load) RL = 27 Ω (RS-485) (Figure 2) RL = 50 Ω (RS-422) (Figure 2.) 1.5 5 5 V V ΔVOD Change in magnitude of driver differential output voltage for complementary output states RL = 27 Ω or 50 Ω (Figure 2)0.2 V VOC Driver common-mode output voltage RL = 27 Ω or 50 Ω (Figure 2)3 V ΔVOC Change in magnitude of driver common-mode output voltage for complementary output states RL = 27 Ω or 50 Ω (Figure 2)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 ± 2µA IIN2 Input current (A, B) VCM = 0 V or 5.25 V, VDE = 0 V VIN = 12 V VIN = -7 V 1 -0.8 mA mA VTH Receiver differential threshold voltage VCM = -7 to 12 V -0.2 0.2 V ΔVTH Receiver input hysteresis VCM = 0 V 70 mV VOH Receiver output high voltage IO = -4 mA, VID = 200 mV 3.5 V VOL Receiver output low voltage IO = 4 mA, VID = -200 mV 0.4 V IOZR 3-State (high impedance) output current at receiver VO = 0.4 to 2.4 V ± 1µA RIN Receiver input resistance VCM = -7 to 12 V 96 k Ω ICC No load supply current (2) VRE = 0V or VCC VDE = VCC VDE = 0 V 400 300 900 500 µA µA IOSD1 Driver short-circuit current, VO=High VO = -7 to 12 V (3) 35 250 mA |
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