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SP339E Datasheet(PDF) 8 Page - Exar Corporation |
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SP339E Datasheet(HTML) 8 Page - Exar Corporation |
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8 / 21 page  SP339E 8 RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION REV. 1.0.0 TIMING CHARACTERISTICS 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 ALL MODES tENABLE Enable from Shutdown 1000 ns tSHUTDOWN Enable to Shutdown 1000 ns RS-232, DATA RATE = 250kbps (SLEW = Vcc), ONE TRANSMITTER SWITCHING Maximum Data Rate 250 kbps RL = 3kΩ, CL = 1000pF tRHL, tRLH Receiver Propagation Delay 100 ns CL = 150pF, Figure 9 ⏐tRHL-tRLH⏐ Receiver Propagation Delay Skew 100 ns tDHL, tDLH Driver Propagation Delay 1400 ns RL = 3kΩ, CL = 2500pF, Figure 10 ⏐tDHL-tDLH⏐ Driver Propagation Delay Skew 600 ns tSHL, tSLH Transition Region Slew Rate from +3.0V to -3.0V or -3.0V to +3.0V 4 30 V/ µs VCC = 3.3V, RL = 3kΩ to 7kΩ, CL = 150pF to 2500pF, Figure 10 tSHL, tSLH Transition Region Slew Rate from +3.0V to -3.0V or -3.0V to +3.0V 6 30 V/ µs VCC = 3.3V, RL = 3kΩ to 7kΩ, CL = 150pF to 2500pF, TA = 25°C, Figure 10 RS-232, DATA RATE = 1Mbps (SLEW = 0V), ONE TRANSMITTER SWITCHING Maximum Data Rate 1 Mbps RL = 3kΩ, CL = 250pF tRHL, tRLH Receiver Propagation Delay 100 ns CL = 150pF, Figure 9 ⏐tRHL-tRLH⏐ Receiver Propagation Delay Skew 100 ns tDHL, tDLH Driver Propagation Delay 300 ns RL = 3kΩ, CL = 1000pF, Figure 10 ⏐tDHL-tDLH⏐ Driver Propagation Delay Skew 150 ns tSHL, tSLH Transition Region Slew Rate from +3.0V to -3.0V or -3.0V to +3.0V 15 150 V/ µs VCC = 3.3V, RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, Figure 10 tSHL, tSLH Transition Region Slew Rate from +3.0V to -3.0V or -3.0V to +3.0V 24 150 V/ µs VCC = 3.3V, RL = 3kΩ to 7kΩ, CL = 150pF to 1000pF, TA = 25°C, Figure 10 |
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