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ST3243CDR Datasheet(PDF) 5 Page - STMicroelectronics |
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ST3243CDR Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 14 page ST3243 5/14 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) TIMING 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 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 ± 35 ± 60 mA 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 1.2 1.2 V VRIH RS-232 Input Threshold High TA = 25°C VCC =3.3V TA = 25°C VCC =5.0V 1.5 1.8 2.4 2.4 V VRIHYS Input Hysteresis 0.5 V RRIN Input Resistance TA = 25°C 3 5 7 K Ω Symbol Parameter Test Conditions Min. Typ. Max. Unit DR Maximum Data Rate RL =3KΩ CL= 1000pF one transmitter switching 250 400 Kbps tPHL tPLH Receiver Propagation Delay RIN to ROUT CL = 150pF 0.15 µs tT_SKEW Transmitter Skew 100 ns tR_SKEW Receiver Skew 50 ns tINVH Receiver Positive or negative Threshold to INVALID HIGH 1 µs tINVL Receiver Positive or negative Threshold to INVALID LOW 30 µs SRT Transition Slew Rate TA = 25°C RL =3Kto7KΩ VCC =3.3V measured from +3V to -3V or -3V to +3V CL = 150pF to 1000pF CL = 150pF to 2500pF 6 4 30 30 V/ µs V/ µs |
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