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ST485ABDR Datasheet(PDF) 6 Page - STMicroelectronics |
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ST485ABDR Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 19 page Electrical characteristics ST485AB 6/19 4 Electrical characteristics Table 6. DC electrical characteristics (VCC = 4.5 V to 5.5 V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C, VCC = 5 V) (Note: 1) Symbol Parameter Test conditions Min. Typ. Max. Unit ISUPPLY VCC Power supply current No load, VRE=0 V or VCC VDE = VCC 2.3 5 mA VDE = 0 V 2.6 5 mA CI/O Input/output capacitance 10 pF CAB Driver output capacity 10 pF Table 7. Logic input electrical characteristics (VCC = 4.5 V to 5.5 V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C, VCC = 5 V) (Note: 1) Symbol Parameter Test conditions Min. Typ. Max. Unit VIL Input logic threshold low DE, DI, RE 0.8 V VIH Input logic threshold high DE, DI, RE 2 V IIN1 Logic input current DE, DI, RE ± 2.0 µA IIN2 Input current (A, B) VDE=0 V, VCC= 0 or 5.25 V VIN=12 V 1 mA VIN=-7 V -0.8 mA Table 8. Transmitter electrical characteristics (VCC = 4.5 V to 5.5 V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C, VCC = 5 V) (Note: 1) Symbol Parameter Test conditions Min. Typ. Max. Unit VOD1 Differential driver output (No load) 5 V VOD2 Differential driver output (with load) RL= 54 Ω (RS-422) VCM= -7 V to 12 V 1.5 2.7 5 V ΔVOD Change in magnitude of driver differential output voltage for complementary output states (Note: 1) RL= 27 Ω or 50 Ω 00.2 V VOC Driver common mode output voltage RL= 27 Ω or 50 Ω 13 V ΔVOC Change in magnitude of driver common mode output voltage (Note: 1) RL= 54 Ω or 100 Ω 00.2 V IOSD Driver short circuit output current VO= -7 V to 12 V ± 250 mA |
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