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SN75185DB Datasheet(PDF) 8 Page - Texas Instruments |
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SN75185DB Datasheet(HTML) 8 Page - Texas Instruments |
8 / 19 page www.ti.com PARAMETER MEASUREMENT INFORMATION IOS(L) −IOS(H) VI VO VDD or GND VSS or GND RL = 3 kΩ −IIL IIH VI VI Pulse Generator (see Note B) CL (see Note A) RL 3 V 0 V 1.5 V 1.5 V Input tPHL tPLH 90% 50% 10% 50% 10% 90% tTHL tTLH VOH VOL TEST CIRCUIT VOLTAGE WAVEFORMS Input Output Output VI VT, VI IOL VOH −IOH VOL SN75185 MULTIPLE RS-232 DRIVERS AND RECEIVERS SLLS181D–DECEMBER 1994–REVISED JANUARY 2006 Figure 1. Driver Test Circuit for VOH,VOL,IOS(H),and IOS(L) Figure 2. Driver Test Circuit for IIH and IIL A. CL includes probe and jig capacitance. B. The pulse generator has the following characteristics: tw =25 μs, PRR = 20 kHz, ZO =50 Ω,tr =tf <50ns. Figure 3. Driver Test Circuit and Voltage Waveforms Figure 4. Receiver Test Circuit for IOS Figure 5. Receiver Test Circuit for VT,VOH,and VOL 8 |
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