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ST485CDR Arkusz danych(PDF) 6 Page - STMicroelectronics |
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ST485CDR Arkusz danych(HTML) 6 Page - STMicroelectronics |
6 / 19 page Electrical characteristics ST485B - ST485C 6/19 4 Electrical characteristics Table 6. 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) Value Unit -40 to 85 °C -55 to 125 °C Min. Typ. Max. Min. Max. VOD1 Differential driver output (no load) 55 V VOD2 Differential driver output (with load) RL = 27Ω (RS-485) Figure 2 RL = 50Ω (RS-422) Figure 2 1.5 5 5 1.4 5 5 V V ΔVOD Change in magnitude of driver differential output voltage for complementary output states RL = 27Ω or 50Ω Figure 2 0.2 0.2 V VOC Driver common-mode output voltage RL = 27Ω or 50Ω Figure 2 33 V ΔVOC Change in magnitude of driver common-mode output voltage for complementary output states RL = 27Ω or 50Ω Figure 2 0.2 0.2 V VIH Input high voltage RE, DE, DI 2.0 2.0 V VIL Input low voltage RE, DE, DI 0.8 0.8 V IIN1 Input current RE, DE, DI ± 2 ± 2µA IIN2 Input current (A, B) VCM = 0V or 5.25V, VDE = 0V VIN = 12V VIN = -7V 1 -0.8 1 -0.8 mA mA VTH Receiver differential threshold voltage VCM = -7 to 12V -0.2 0.2 -0.2 0.2 V ΔVTH Receiver input hysteresis VCM = 0V 70 mV VOH Receiver output high voltage IO = -4mA, VID = 200mV 3.5 3.4 V VOL Receiver output low voltage IO = 4mA, VID = -200mV 0.4 0.55 V IOZR 3-state (high impedance) output current at receiver VO = 0.4 to 2.4V ± 1 ± 1µA RIN Receiver input resistance VCM = -7 to 12V 24 24 K Ω ICC No load supply current (2) VRE = 0V or VCC VDE = VCC VDE = 0V 400 300 900 500 900 500 µA µA |
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Podobny opis - ST485CDR |
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