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MAX3218C/D 数据表(PDF) 3 Page - Maxim Integrated Products |
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MAX3218C/D 数据表(HTML) 3 Page - Maxim Integrated Products |
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3 / 12 page  1µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™ _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1, VCC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.0V, TA = +25°C.) ns 500 tDT Transmitter Output Disable Time 2500pF || 3k Ω load each transmitter, one trans- mitter switching, 150pF load each receiver TA = +25°C, VCC = 3.0V, RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from +3V to -3V or -3V to +3V 2500pF || 3k Ω load 150pF load 150pF load 2500pF || 3k Ω load CONDITIONS ns 200 500 tDR Receiver Output Disable Time ns 90 300 tER kbps 120 235 Data Rate Receiver Output Enable Time V/µs 3.0 30 Transition Region Slew Rate 1.8 2.7 tPLHT Transmitter Propagation Delay µs 250 450 tET Transmitter Output Enable Time ns 290 1000 tPHLR 260 1000 tPLHR Receiver Propagation Delay µs 1.9 2.7 tPHLT UNITS MIN TYP MAX SYMBOL PARAMETER TIMING CHARACTERISTICS (Circuit of Figure 1, VCC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.0V, TA = +25°C.) VCC = 2.0V to 4.25V CONDITIONS 0.4 UNITS MIN TYP MAX PARAMETER VCC = 1.8V to 4.25V VCC = 1.8V to 4.25V V 0.3 Input Threshold Low 3.0 -15V < R_IN < 15V k Ω 35 7 VCC = 1.8V to 3.6V Input Resistance Input Hysteresis V V 2.8 Input Threshold High 0.7 VCC = 0V, -2V < T_OUT < 2V Output Short-Circuit Current mA Ω 300 Output Resistance ±24 ±100 All transmitter outputs loaded with 3k Ω to ground Output Voltage Swing V ±5 ±6 V -25 +25 Input Voltage Range EIA/TIA-232E RECEIVER INPUTS EIA/TIA-232E TRANSMITTER OUTPUTS Figure 4b µs 250 tWU Receiver Threshold to Transmitters Enabled Figure 4b µs 1 tINVH Receiver Positive or Negative Threshold to INVALID High Figure 4b µs 30 tINVL Receiver Positive or Negative Threshold to INVALID Low AUTOSHUTDOWN TIMING |
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