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SP339EER1-TR Datasheet(PDF) 8 Page - Exar Corporation |
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SP339EER1-TR Datasheet(HTML) 8 Page - Exar Corporation |
8 / 23 page SP339E 8 RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.4 ELECTRICAL CHARACTERISTICS (Continued) UNLESS OTHERWISE NOTED: VCC = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1 F; TA = TMIN to TMAX. Typical values are at VCC = 3.3V, TA = +25°C. SYMBOL PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS DIFFERENTIAL RECEIVER INPUTS (RS-485 / RS-422) RIN Receiver Input Resistance 96 k TERM = 0V, -7V VIN +12V VTH Receiver Differential Threshold Voltage -200 -125 -50 mV VTH Receiver Input Hysteresis 25 mV VCM = 0V IIN Receiver Input Current 125 A VIN = +12V -100 A VIN = -7V RTERM Termination Resistance 100 120 155 TERM = VCC, Figure 5 -7V VCM +12V RTERM Termination Resistance 100 120 140 TERM = VCC, Figure 5 VCM = 0V DIFFERENTIAL DRIVER OUTPUTS (RS-485 / RS-422) VOD Differential Driver Output 2 VCC V RL = 100 (RS-422), Figure 6 1.5 VCC V RL = 54 (RS-485), Figure 6 1.5 VCC V -7V VCM +12V, Figure 7 VCC V No Load VOD Change In Magnitude of Differential Output Voltage -0.2 +0.2 V RL = 54 or 100 , Figure 6 VCM Driver Common Mode Output Voltage 3 V RL = 54 or 100 , Figure 6 VCM Change In Magnitude of Common Mode Output Voltage 0.2 V RL = 54 or 100 , Figure 6 IOSD Driver Output Short Circuit Current -250 250 mA -7V VO +12V, Figure 8 IO Driver Output Leakage Current 100 A DIR1 = 0V in Mode 11, or ENABLE = 0V, VO +12V, VCC = 0V or 5.25V -100 A DIR1 = 0V in Mode 11, or ENABLE = 0V, VO -7V, VCC = 0V or 5.25V |
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