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MAX3229 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX3229 Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 14 page +2.5V to +5.5V RS-232 Transceivers in UCSP _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.5V to +5.5V, VL = +1.65V to +5.5V, C1–C4 = 0.1µF, tested at +3.3V ±10%, TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS RECEIVER INPUTS Input Voltage Range -25 +25 V VCC = 3.3V 0.6 1.2 Input Threshold Low TA = +25°C VCC = 5.0V 0.8 1.7 V VCC = 3.3V 1.3 2.4 Input Threshold High TA = +25°C VCC = 5.0V 1.8 2.4 V Input Hysteresis 0.5 V Input Resistance 35 7 k Ω AUTOSHUTDOWN Positive threshold 2.7 Receiver Input Threshold to INVALID Output High Figure 3a Negative threshold -2.7 V Receiver Input Threshold to INVALID Output Low -0.3 0.3 V Receiver Positive or Negative Threshold to INVALID High tINVH VCC = +5.0V, Figure 3b 1 µs Receiver Positive or Negative Threshold to INVALID Low tINVL VCC = +5.0V, Figure 3b 30 µs Receiver Edge to Transmitters Enabled tWU VCC = +5.0V, Figure 3b 100 µs TRANSMITTER OUTPUTS VCC Mode Switch Point (VCC Falling) T_OUT = ±5.0V to ±3.7V 2.85 3.1 V VCC Mode Switch Point (VCC Rising) T_OUT = ±3.7V to ±5.0V 3.3 3.7 V VCC Mode Switch Point Hysteresis 400 mV VCC = +3.1V to +5.5V, VCC falling ±5 ±5.4 Output Voltage Swing All transmitter outputs loaded with 3k Ω to ground. VCC = +2.5V to +2.9V ±3.7 V Output Resistance VCC = V+ = V- = 0, T_OUT = ±2V 300 10M Ω Output Short-Circuit Current ±60 mA Output Leakage Current T_OUT = ±12V, transmitters disabled ±25 µA INVALID OUTPUT Output Voltage Low IOUT = 0.8mA 0.4 V Output Voltage High IOUT = -0.5mA VCC - 0.4 VCC - 0.1 V |
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