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SN75ALS170ADW Datasheet(PDF) 7 Page - Texas Instruments |
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SN75ALS170ADW Datasheet(HTML) 7 Page - Texas Instruments |
7 / 21 page SN75ALS170, SN75ALS170A TRIPLE DIFFERENTIAL BUS TRANSCEIVER SLLS055D – AUGUST 1987 – REVISED SEPTEMBER 1995 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 RECEIVER SECTION electrical characteristics over recommended ranges of common-mode input voltage, supply voltage, and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VIT + Positive-going input threshold voltage VO = 2.7 V, IO = – 0.4 mA 0.3 V VIT – Negative-going input threshold voltage VO = 0.5 V, IO = 8 mA – 0.3 ‡ V Vhys Hysteresis voltage (VIT + – VIT –) 60 mV VIK Enable-input clamp voltage II = – 18 mA – 1.5 V VOH High-level output voltage VID = 300 mV, See Figure 5 IOH = – 400 µA, 2.7 V VOL Low-level output voltage VID = – 300 mV, See Figure 5 IOL = 8 mA, 0.45 V IOZ High impedance state output current VO = 2.4 V 20 µA IOZ High-impedance-state output current VO = 0.4 V – 400 µA II Line input current Other input = 0, VI = 12 V 1 mA II Line input current , See Note 4 VI = – 7 V – 0.8 mA IIH High-level enable-input current VIH = 2.7 V 20 µA IIL Low-level enable-input current VIL = 0.4 V – 100 µA rI Input resistance 12 k Ω IOS Short-circuit output current VID = 300 mV, VO = 0 –15 –85 mA ICC Supply current No load Outputs enabled 69 90 mA ICC Supply current No load Outputs disabled 57 78 mA † All typical values are at VCC = 5 V and TA = 25°C. ‡ The algebraic convention, in which the less-positive (more-negative) limit is designated minimum, is used in this data sheet for common-mode input voltage and threshold voltage levels only. NOTE 4: This applies for both power on and off; refer to EIA Standard RS-485 for exact conditions. switching characteristics over recommended ranges of supply voltage and operating free-air temperature range PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT tPLH Propagation delay time, low-to-high-level ALS170 9 19 ns tPLH gy , g output ALS170A VID = – 1.5 V to 1.5 V, CL =15 pFTA =25°C 11.5 16.5 ns tPHL Propagation delay time, high-to-low-level ALS170 CL = 15 pF, TA = 25°C, See Figure 6 9 19 ns tPHL gy , g output ALS170A See Figure 6 11.5 16.5 ns t k( ) Pulse skew§ ALS170 2 6 ns tsk(p) Pulse skew§ ALS170A VID = – 1.5 V to 1.5 V, 5 ns tsk(lim) Skew limit¶ ALS170 ID , CL = 15 pF, See Figure 6 10 ns tsk(lim) Skew limit¶ ALS170A 5 ns † All typical values are at VCC = 5 V and TA = 25°C. § Pulse skew is defined as the | tPLH–tPHL| 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. |
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