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SP338EER1-L Datasheet(PDF) 7 Page - Exar Corporation |
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SP338EER1-L Datasheet(HTML) 7 Page - Exar Corporation |
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7 / 25 page  SP338E 7 REV. 1.0.0 RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION ELECTRICAL CHARACTERISTICS (Continued) UNLESS OTHERWISE NOTED: VCC = +3.3V ±5% or +5.0V ±5%, C1-C4 = 0.1µF; 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 Ω 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 µA VIN = +12V -100 µA VIN = -7V RTERM Termination Resistance 100 120 155 Ω TERM = VCC, Figure 9 -7V ≤ VCM ≤ +12V RTERM Termination Resistance 100 120 140 Ω TERM = VCC, Figure 9 VCM = 0V DIFFERENTIAL DRIVER OUTPUTS (RS-485 / RS-422) VOD Differential Driver Output 2 VCC V RL = 100Ω (RS-422), Figure 10 1.5 VCC V RL = 54Ω (RS-485), Figure 10 1.5 VCC V VCM = -7V, Figure 11 1.5 VCC V VCM = +12V, Figure 11 ∆VOD Change In Magnitude of Differential Output Voltage -0.2 +0.2 V RL = 54Ω or 100Ω, Figure 10 VCM Driver CommonMode Output Voltage 3 V RL = 54Ω or 100Ω, Figure 10 ∆VCM Change In Magnitude of Common Mode Output Voltage 0.2 V RL = 54Ω or 100Ω, Figure 10 IOSD Driver Output Short Circuit Current ±250 mA -7V ≤ VO ≤ +12V, Figure 12 IO Driver Output Leakage Current ±100 µA ENABLE = 0V, or DIR1 = 0V and DIR2 = 0V in full duplex modes, -7V ≤ VO ≤ +12V |
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