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ST75C185BD Datasheet(PDF) 5 Page - STMicroelectronics |
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ST75C185BD Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 13 page RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (VDD = 12V, VSS = -12V, VCC =5V ±10%, unless otherwise specified) Symb ol Parameter T est Cond it ion s Value Un it Min. Typ. Max. VT+ Positive Going Threshold Voltage (See Figure 6) 1.6 2.1 2.55 V VT- Negative Going Threshold Voltage (See Figure 6) 0.65 1 1.25 V Vhys Input Hysteresis (VT+ -VT-) (Note 6) 0.6 1.1 V VOH High Level Output Voltage (Note 7) IOH = 0.75mA or Input Open IOH = -1mA (See Figure 6) 3.5 4.8 V VOL Low Level Output Voltage VI =3 V IOL =3.2 mA (See Figure 6) 0.2 0.4 V IIH High Level Input Current VI = 25 V (See Figure 6) 3.6 4.5 8.3 mA VI = 3 V (See Figure 6) 0.43 0.55 1 IIL Low Level Input Current VI = -25 V (See Figure 6) -3.6 -4.4 -8.3 mA VI = -3 V (See Figure 6) -0.4 -0.55 -1 IOS(H) Short-Circuit Output Current at High Level VI =0.75 V VO =0 V (See Figure 5) -13 -30 mA IOS(L) Short-Circuit Output Current at Low Level VI =VCC VO =VCC (See Figure 5) 35 60 mA Alltypical values are at TA =25 oC, NOTE 6: Hysteresis is thedifference between the positive going input threshold voltage, VT+, and the negative going input threshold voltage VT-. NOTE 7: Ifthe inputs are letf unconnected, the receiver interprets this as an input low, and the receiver outputs will remain in the high state. RECEIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC =5V ±10% TA =25 oC) Symbo l Parameter T est Co ndi tio ns Value Uni t Min. Typ . Max. tPLH Propagation Delay Time, Low to High Level Output RL =5 K Ω CL =50 pF (See Figure 6) 3.2 4 µs tPHL Propagation Delay Time High to Low Level Output RL =5 K Ω CL =50 pF (See Figure 6) 2.6 4 µs tTLH Transition Time Low to High Level Output RL =5 K Ω CL =50 pF (See Figure 6) 30 100 ns tTHL Transition Time High to Low Level Output RL =5 K Ω CL =50 pF (See Figure 6) 10 50 ns tW(N) Pulse Duration of longest pulse rejection as noise (Note8) RL =5 K Ω CL =50 pF (See Figure 6) 1 2.3 4 µs NOTE 8: The receiver ignores any positive or negative going pulse that is less than the minimumvalue oftW(N) and accepts anypositive or negative going pulse greater than the maximum of tW(N). ST75C185 5/13 |
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