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SN75ALS170ADWG4 Datasheet(PDF) 6 Page - Texas Instruments |
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SN75ALS170ADWG4 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 21 page SN75ALS170, SN75ALS170A TRIPLE DIFFERENTIAL BUS TRANSCEIVER SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT ALS170 RL = 54 Ω, CL = 50 pF, 3 8 13 ALS170A L , TA =25°C, L , See Figure 3 5.5 8 10.5 td(OD) Differential output delay time ALS170 RL1 = RL3 = 165 Ω, CL =60 pF RL2 = 75 Ω, TA =25°C 3 8 13 ns ALS170A CL = 60 pF, See Figure 4 TA =25°C, 5.5 8 10.5 t k( ) Pulse skew‡ RL = 54 Ω, See Figure 3 CL = 50 pF, 1 5 ns tsk(p) Pulse skew‡ RL1 = RL3 = 165 Ω, CL = 60 pF, RL2 = 75 Ω, See Figure 4 1 5 ns § ALS170 RL = 54 Ω, CL = 50 pF, 10 t k(li ) Skew limit§ ALS170A L , See Figure 3 L , 5 ns tsk(lim) Skew limit§ ALS170 RL1 = RL3 = 165 Ω, RL2 = 75 Ω, 10 ns ALS170A L1 L3 , CL = 60 pF, L2 , See Figure 4 5 tt(OD) Differential output transition time RL = 54 Ω, See Figure 3 CL = 50 pF, 3 8 13 ns tt(OD) Differential-output transition time RL1 = RL3 = 165 Ω, CL = 60 pF, RL2 = 75 Ω, See Figure 4 3 8 13 ns † All typical values are at VCC = 5 V and TA = 25°C. ‡ Pulse skew is defined as the | td(ODH)–td(ODL)| of each channel. § Skew limit is the maximum difference in propagation delay times between any two channels of one device and between any two devices. This parameter is applicable at one VCC and operating temperature within the recommended operating conditions. SYMBOL EQUIVALENTS DATA SHEET PARAMETER EIA/TIA-422-B RS-485 VO Voa, Vob Voa, Vob | VOD1 | VO VO | VOD2 | Vt (RL = 100 Ω) Vt (RL = 54 Ω) | VOD3 | Vt (Test Termination Measurement 2) Vtest Vtst ∆ | VOD | || Vt | – | Vt || || Vt | – | Vt || VOC | Vos | | Vos | ∆ | VOC | | Vos – Vos | | Vos – Vos | IOS | Isa |, | Isb | IO | Ixa |, | Ixb | Iia, Iib |
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