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TL145406DW bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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TL145406DW bảng dữ liệu(HTML) 5 Page - Texas Instruments |
5 / 10 page TL145406 TRIPLE RS-232 DRIVERS/RECEIVERS SLLS185A – DECEMBER 1994 – REVISED MARCH 1995 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 RECEIVER SECTION electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT Positive going threshold voltage See Figure 5 TA = 25°C 1.75 1.9 2.3 VIT+ Positive-going threshold voltage See Figure 5 TA = 0°C to 70 °C 1.55 2.3 V VIT– Negative-going threshold voltage 0.75 0.97 1.25 V Vhys Input hysteresis (VIT + – VIT–) 0.5 VOH High level output voltage IOH =0 5 mA VIH = 0.75 V 2.6 4 5 V VOH High-level output voltage IOH = – 0.5 mA Inputs open 2.6 V VOL Low-level output voltage IOL = 10 mA, VI = 3 V 0.2 0.45 V IIH High level input current VI = 25 V, See Figure 5 3.6 8.3 mA IIH High-level input current VI = 3 V, See Figure 5 0.43 mA IIL Low level input current VI = – 25 V, See Figure 5 – 3.6 – 8.3 mA IIL Low-level input current VI = – 3 V, See Figure 5 – 0.43 mA IOS Short-circuit output current – 3.4 –12 mA † All typical values are at TA = 25°C, VCC = 5, VDD = 9 V, and VSS = –9 V. switching characteristics, VCC = 5 V, VDD = 12 V, VSS = –12 V, TA = 25°C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tPLH Propagation delay time, low- to high-level output 107 425 ns tPHL Propagation delay time, high- to low-level output CL = 50 pF, RL = 5 kΩ, 42 150 ns tTLH Transition time, low- to high-level output L , See Figure 6 L 175 400 ns tTHL Transition time, high- to low-level output 16 60 ns PARAMETER MEASUREMENT INFORMATION Figure 1. Driver Test Circuit for VOH, VOL, IOS(H), and IOS(L) IOS(L) –IOS(H) VSS VDD VCC VI VO VDD or GND VSS or GND RL = 3 kΩ Figure 2. Driver Test Circuit for IIH and IIL –IIL IIH VSS VDD VCC VI VI |
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