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ST3237E Scheda tecnica(PDF) 7 Page - STMicroelectronics |
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ST3237E Scheda tecnica(HTML) 7 Page - STMicroelectronics |
7 / 17 page ST3237E Electrical characteristics 7/17 Note: Transmitter Skew is measured at the transmitter zero cross points Table 7. Receiver (C1 - C4 = 0.1µF tested at 3.3V±10%, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter Test conditions Min. Typ. Max. Unit IOL Output leakage current Receiver disabled, EN = VCC ± 0.05 ± 10 µA VOL Output voltage low IOUT = 1mA 0.4 V VOH Output voltage high IOUT = -1mA VCC-0.6 VCC-0.1 V VRIN Receiver input voltage operating range -25 25 V VRIL RS-232 input threshold low TA = 25°C, VCC = 3.3V 0.6 1.1 V TA = 25°C, VCC = 5V 0.8 1.5 VRIH RS-232 input threshold high TA = 25°C, VCC = 3.3V 1.5 2.4 V TA = 25°C, VCC = 5V 1.2 2.4 VRIHYS Input hysteresis 0.3 V RRIN Input resistance TA = 25°C 3 5 7 K Ω Table 8. Timing characteristics (C1 - C4 = 0.1µF tested at 3.3V±10%, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to TA = 25°C) Symbol Parameter Test conditions Min. Typ. Max. Unit DR Maximum data rate RL = 3KΩ, CL= 1000pF one transmitter switching, VHSCI=GND 250 Kbps RL = 3KΩ, CL= 250pF one transmitter switching, VHSCI=VCC VCC= 3 to 4.5V 1000 Kbps RL = 3KΩ, CL= 1000pF one transmitter switching, VHSCI=VCC VCC= 4.5 to 5.5V 1000 Kbps tPHLR tPLHR Propagation delay input to output RIN to ROUT, CL = 150pF 0.15 µs tPHLR tPLHR Propagation delay input to output RL = 3kΩ, CL = 1000pF, VHSCI=VCC VHSCI=GND 400 1000 ns ns tT_SKEW Transmitter skew |tPHL - tTLH|, VHSCI=GND 300 ns |tPHL - tTLH|, VHSCI=VCC 50 ns tR_SKEW Receiver skew |tPHL - tTLH| 100 ns tOER Receiver output enable time Normal operation 50 ns tODR Receiver output disable time Normal operation 120 ns SRT Transition slew rate TA = 25°C RL = 3 to 7KΩ, VCC = 3.3V measured from +3V to -3V or -3V to +3V CL = 150pF to 1000pF, VHSCI=GND CL = 150pF to 1000pF, VHSCI=VCC CL = 150pF to 2500pF, VHSCI=GND 6 24 4 30 150 30 V/ µs V/ µs V/ µs |
Codice articolo simile - ST3237E_06 |
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Descrizione simile - ST3237E_06 |
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