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SN75LBC171DWRG4 Datasheet(PDF) 4 Page - Texas Instruments |
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SN75LBC171DWRG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 18 page SN65LBC171, SN75LBC171 TRIPLE DIFFERENTIAL TRANSCEIVERS SLLS460A – NOVEMBER 2000 – REVISED FEBRUARY 2001 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 DRIVER SECTION electrical characteristics over recommended operating conditions PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VIK Input clamp voltage D, DE, CDE II = 18 mA –1.5 –0.7 V VO Open-circuit output voltage (single-ended) A or B, No load 0 VCC V St d t t diff ti l t t lt No load 3.8 4.3 VCC V |VOD(SS)| Steady-state differential output voltage magnitude‡ RL = 54 Ω, See Figure 1 1 1.6 2.4 V () magnitude‡ With common-mode loading, See Figure 2 1 1.6 2.4 V ∆VOD Change in differential output voltage magnitude, | VOD(H) | – |VOD(L) | R54 Ω –0.2 0.2 V VOC(SS) Steady-state common-mode output voltage RL = 54 Ω, CL =50 pF See Figure 1 2 2.4 2.8 V ∆VOC(SS) Change in steady-state common-mode output voltage (VOC(H) – VOC(L)) CL = 50 F –0.2 0.2 V II Input current D, DE, CDE –100 100 µA IO Output current with power off VCC = 0 V, VO = –7 V to 12 V –700 900 µA IOS Short-circuit output current VO = –7 V to 12 V, See Figure 7 –250 250 mA ICC Supply current (driver enabled) D at 0 V or VCC, CDE, DE, RE at VCC, No load 14 20 mA † All typical values are at VCC = 5 V and TA = 25°C. ‡ The minimum VOD may not fully comply with TIA/EIA-485-A at operating temperatures below 0°C. System designers should take the possibly lower output signal into account in determining the maximum signal-transmission distance. switching characteristics over recommended operating conditions PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tPLH Differential output propagation delay, low-to high 4 8.5 12 tPHL Differential output propagation delay, high-to-low 4 8.5 11 tr Differential output rise time R54 Ω C50 pF 3 7.5 11 tf Differential output fall time RL = 54 Ω, See Figure 3 CL = 50 pF, 3 7.5 11 ns tsk(p) Pulse skew | (tPLH – tPHL) | See Figure 3 2 tsk(o) Output skew§ 1.5 tsk(pp) Part-to-part skew¶ 2 tPLH Differential output propagation delay, low-to high 3 7 10 tPHL Differential output propagation delay, high-to-low 3 7.5 10 tr Differential output rise time See Figure 4 3 7.5 12 tf Differential output fall time See Figure 4, (HVD SCSI double-terminated load) 3 7.5 12 ns tsk(p) Pulse skew | (tPLH – tPHL) | (HVD SCSI double-terminated load) 3 tsk(o) Output skew§ 1.5 tsk(pp) Part-to-part skew¶ 2.5 tPZH Output enable time to high level See Figure 5 15 25 ns tPHZ Output disable time from high level See Figure 5 18 25 ns tPZL Output enable time to low level See Figure 6 10 25 ns tPLZ Output disable time from low level See Figure 6 17 25 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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