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ST485XDR 데이터시트(PDF) 7 Page - STMicroelectronics |
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ST485XDR 데이터시트(HTML) 7 Page - STMicroelectronics |
7 / 19 page ST485 Electrical characteristics 7/19 4.1 Driver switching characteristics VCC = 5V ± 5%, TA = TMIN to TMAX , unless otherwise specified. Typical values are referred to TA = 25°C ICC No Load Supply Current (2) VRE = 0V or VCC VDE = VCC VDE = 0V 400 300 900 500 900 500 µA µA IOSD1 Driver Short-Circuit Current, VO=High VO = -7 to 12V (3) 35 25035250 mA IOSD2 Driver Short-Circuit Current, VO=Low VO = -7 to 12V (3) 35 25035250 mA IOSR Receiver Short-Circuit Current VO = 0V to VCC 7 95795 mA 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. 2. Supply current specification is valid for loaded transmitters when VDE = 0V 3. Applies to peak current. See typical Operating Characteristics. Table 5. DC Electrical characteristics Symbol Parameter Test conditions (1) Value Unit -40 to 85 °C -55 to 125 °C Min Typ Max Min Max Table 6. Driver switching characteristics Symbol Parameter Test conditions (1) Value Unit -40 to 85 °C -55 to 125°C Min. Typ. Max. Min. Max. tPLH tPHL Propagation Delay Input to Output RDIFF = 54ΩCL1 = CL2 = 100pF (See Figure 4. and Figure 6.) 10 30 60 70 ns tSK Output Skew to Output RDIFF = 54ΩCL1 = CL2 = 100pF (See Figure 4. and Figure 6.) 510 10 ns tTLH tTHL Rise or Fall Time RDIFF = 54ΩCL1 = CL2 = 100pF (See Figure 4. and Figure 6.) 3 15 40 3 45 ns tPZH Output Enable Time CL = 100pFS2 = Closed (See Figure 5. and Figure 7.) 70 90 90 ns tPZL Output Enable Time CL = 100pFS1 = Closed (See Figure 5. and Figure 7.) 70 90 90 ns tPLZ Output Disable Time CL = 15pFS1 = Closed (See Figure 5. and Figure 7.) 70 90 90 ns tPHZ Output Disable Time CL = 15pFS2 = Closed (See Figure 5. and Figure 7.) 70 90 90 ns 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. |
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