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ST491ABN Folha de dados(PDF) 3 Page - STMicroelectronics |
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ST491ABN Folha de dados(HTML) 3 Page - STMicroelectronics |
3 / 12 page ST491A 3/12 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. ELECTRICAL CHARACTERISTICS VCC =4.5V to5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA =25°C) TRANSMITTER ELECTRICAL CHARACTERISTICS VCC = 4.5V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta = 25°C) Symbol Parameter Value Unit VCC Supply Voltage 7V VDI Driver Input Voltage -0.5 to 7 V VY,VZ Driver Output Voltage -7.5 to 12.5 V VA,VB Receiver Input Voltage -7.5 to 12.5 V VRO Receiver Output Voltage -0.3 to (VCC + 0.3) V ESD Human Body Model 3.5 KV Symbol Parameter Test Conditions Min. Typ. Max. Unit ISUPPLY No Load Supply Current 2 5 mA CIN Input Capacitance 1.8 pF CYZ Driver Output Capacitance 1.2 pF COUT Output Capacitance 2.3 pF Symbol Parameter Test Conditions Min. Typ. Max. Unit VOD1 Differential Drive Output (No load) VCC V VOD2 Differential Drive Output (With Load) RL=54Ω (RS-422) (Figure 1) 1.5 2.6 5 V VOD3 Differential Drive Output (With Load) RL= 100Ω (RS-422) (Figure 1) 2 3 V ∆V OD Change in magnitude of Driver Differential Output Voltage for Complementary Output States (Note1) RL=54Ω or 100Ω (Figure 1) 0 0.2 V VOC Driver Common Mode Output Voltage RL=54Ω (Figure 1) 1 3 V ∆V OC Change in magnitude of Driver Common Mode Output Voltage (Note1) RL=54Ω (Figure 1) 0 0.2 V IOFF Power Off Output Current VCC =0V VO=-7V to 12V ± 100 µA IOSD Driver Short Circuit Output Current VO=-7V to 12V ± 35 ± 250 mA VIL Input Logic Threshold Low 0.8 V VIH Input Logic Threshold High 2 V |
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