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SN65LBC172A16DW Datasheet(PDF) 5 Page - Texas Instruments |
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SN65LBC172A16DW Datasheet(HTML) 5 Page - Texas Instruments |
5 / 22 page SN65LBC172A, SN75LBC172A QUADRUPLE RS485 DIFFERENTIAL LINE DRIVERS SLLS447C − OCTOBER 2000 − REVISED AUGUST 2008 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating conditions PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tPLH Propagation delay time, low-to-high level output 5.5 8 11 ns tPHL Propagation delay time, high-to-low level output 5.5 8 11 ns tr Differential output voltage rise time R = 54 , C = 50 pF, 3 7.5 11 ns tf Differential output voltage fall time RL = 54 Ω, CL = 50 pF, see Figure 4 3 7.5 11 ns tsk(p) Pulse skew |tPLH – tPHL| see Figure 4 0.6 2 ns tsk(o) Output skew† 2 ns tsk(pp) Part-to-part skew‡ 3 ns tPZH Propagation delay time, high-impedance-to-high-level output See Figure 5 25 ns tPHZ Propagation delay time, high-level-output-to-high impedance 25 ns tPZL Propagation delay time, high-impedance-to-low-level output See Figure 6 30 ns tPLZ Propagation delay time, low-level-output-to-high impedance 20 ns † Output skew (tsk(o)) is the magnitude of the time delay difference between the outputs of a single device with all of the inputs connected together. ‡ Part-to-part skew (tsk(pp)) is the magnitude of the difference in propagation delay times between any specified terminals of two devices when both devices operate with the same input signals, the same supply voltages, at the same temperature, and have identical packages and test circuits. |
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