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ST3243ECTR 数据表(PDF) 6 Page - STMicroelectronics |
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ST3243ECTR 数据表(HTML) 6 Page - STMicroelectronics |
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6 / 18 page ![]() ST3243E 6/18 AUTO-POWERDOWN ELECTRICAL CHARACTERISTICS (C1 -C4 =0.1µF, VCC =3V to5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C, FORCEON = GND, FORCEOFF =VCC) TRANSMITTER ELECTRICAL CHARACTERISTICS (C1 -C4 =0.1µF, VCC =3V to5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) RECEIVER ELECTRICAL CHARACTERISTICS (C1 -C4 =0.1µF, VCC =3V to5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter Test Conditions Min. Typ. Max. Unit VRITE Receiver Input Threshold to INVALID Output Voltage HIGH (Fig. 1) Positive Threshold 2.7 V Negative Threshold 2.7 V VRITD Receiver Input Threshold to INVALID Output Voltage LOW (Fig. 1) -0.3 0.3 V VIOL INVALID Output Voltage LOW IOUT =1.6mA 0.4 V VIOH INVALID Output Voltage HIGH IOUT =-1mA VCC-0.6 V tWU Receiver or Transmitter Edge Transmitter Enabled (Fig. 1) 100 µs tINVH Receiver Positive or Negative Threshold to INVALID HIGH (Fig. 1) 0.2 µs tINVL Receiver Positive or Negative Threshold to INVALID LOW (Fig. 1) 30 µs Symbol Parameter Test Conditions Min. Typ. Max. Unit VTOUT Output Voltage Swing All Transmitter outputs are loaded with 3K Ω to GND ± 5 ± 5.4 V ROUT Output Resistance VCC =V+ = V- =0V VOUT = ± 2V 300 10M Ω ISC Output Short Circuit Current VCC =3.3V ± 40 ± 60 mA IL Output Leakage Current VCC = 0 to 5.5V, transmitter output=± 12V, transmitter disabled ± 25 µA VOT Transmitter Output Voltage T1IN = T2IN = GND, T3IN = VCC T3OUT loaded with 3K Ω to GND T1OUT and T2OUT loaded with 2.5mA each ± 5V Symbol Parameter Test Conditions Min. Typ. Max. Unit VRIN Receiver Input Voltage Operating Range -25 25 V VRIL RS-232 Input Threshold Low TA = 25°C VCC =3.3V TA = 25°C VCC =5.0V 0.6 0.8 1.1 1.4 V VRIH RS-232 Input Threshold High TA = 25°C VCC =3.3V TA = 25°C VCC =5.0V 1.6 1.9 2.4 2.4 V VRIHYS Input Hysteresis 0.5 V RRIN Input Resistance TA = 25°C 3 5 7 K Ω |
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