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SN75177B Datasheet(PDF) 4 Page - Texas Instruments |
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SN75177B Datasheet(HTML) 4 Page - Texas Instruments |
4 / 11 page SN75177B, SN75178B DIFFERENTIAL BUS REPEATERS SLLS002C – D2606, JULY 1985 – REVISED FEBRUARY 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–4 DRIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VIK Input clamp voltage II = – 18 mA – 1.5 V VO Output voltage IO = 0 0 6 V |VOD1| Differential output voltage IO = 0 1.5 6 V RL = 100 Ω See Figure 1 1/2 VOD1 |VOD2| Differential output voltage RL = 100 Ω , See Figure 1 OD1 or 2 § V RL = 54 Ω, See Figure 1 1.5 2.5 5 |VOD3| Differential output voltage See Note 3 1.5 5 V ∆|VOD| Change in magnitude of ±02 V ∆|VOD| gg diferential output voltage‡ R54 Ω or 100 Ω See Figure 1 ±0.2 V VOC Common mode output voltage RL = 54 Ω or 100 Ω, See Figure 1 3 V VOC Common-mode output voltage –1 V ∆|VOC| Change in magnitude of ±02 V ∆|VOC| gg common-mode output voltage‡ ±0.2 V IO Output current VCC = 0, VO = – 7 V to 12 V ±100 µA IOZ High-impedance-state output current VO = – 7 V to 12 V ±100 µA IIH High-level input current VI = 2.4 V 20 µA IIL Low-level input current VI = 0.4 V – 400 µA VO = – 7 V – 250 IOS Short-circuit output current VO = VCC 250 mA VO = 12 V 250 ICC Supply current (total package) No load Outputs enabled 57 70 mA ICC Supply current (total package) No load Outputs disabled 26 35 mA † All typical values are at VCC = 5 V and TA = 25°C. ‡ ∆|VOD| and ∆|VOC| are the changes in magnitude of VOD and VOC, respectively, that occur when the input is changed from a high level to a low level. § The minimum VOD2 with a 100-Ω load is either 1/2 VOD1 or 2, whichever is greater. NOTE 3: See Figure 3.5 of EIA Standard RS-485. switching characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tdD Differential-output delay time RL =54 Ω See Figure 3 15 20 ns ttD Differential-output transition time RL = 54 Ω, See Figure 3 20 30 ns tPZH Output enable time to high level RL = 110 Ω, See Figure 4 85 120 ns tPZL Output enable time to low level RL = 110 Ω, See Figure 5 40 60 ns tPHZ Output disable time from high level RL = 110 Ω, See Figure 4 150 250 ns tPLZ Output disable time from low level RL = 110 Ω, See Figure 5 20 30 ns |
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