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ISO35TDW Datasheet(PDF) 6 Page - Texas Instruments |
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ISO35TDW Datasheet(HTML) 6 Page - Texas Instruments |
6 / 31 page ISO35T SLLSE26D – NOVEMBER 2010 – REVISED OCTOBER 2015 www.ti.com 6.8 RS-485 Receiver Electrical Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT(+) Positive-going input threshold voltage IO = -8 mA –20 mV VIT(–) Negative-going input threshold voltage IO = 8 mA –200 Vhys Hysteresis voltage (VIT+ – VIT–) 50 mV VOH High-level output voltage See Figure 18; VID = +200 mV, IO = -8 mA 2.4 V VOL Low-level output voltage See Figure 18; VID = –200 mV, IO = 8 mA 0.4 V IO(Z) High-impedance state output current VO = 0 or VCC1, RE = VCC1 –1 1 µA VA or VB = 12 V 50 100 VA or VB = 12 V, VCC2 = 0 60 100 V IA, IB Bus input current Other input at 0 V µA VA or VB = –7 V –100 –40 VA or VB = -7 V, VCC2 = 0 –100 –30 V IIH High-level input current, RE VIH = 2. V –10 10 µA IIL Low-level input current, RE VIL = 0.8 V –10 10 RID Differential input resistance Measured between A & B 96 k Ω CID Differential input capacitance VI = 0.4 sin (4E6πt) + 0.5V, DE at 0 V 2 pF 6.9 Transformer Driver Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fOSC Oscillator frequency VCC1 = 3.3V ± 10%, D1 and D2 connected to Transformer 300 400 550 kHz RON Switch on resistance D1 and D2 connected to 50 Ω pull-up resistors 1 2.5 Ω tr_D D1, D2 output rise time VCC1 = 3.3V ± 10%, see Figure 24, D1 and D2 connected to 70 ns 50- Ω pull-up resistors. tf_D D1, D2 output fall time VCC1 = 3.3V ± 10%, see Figure 24, D1 and D2 connected to 80 ns 50- Ω pull-up resistors. fSt Startup frequency VCC1 = 2.4 V, D1 and D2 connected to Transformer 350 kHz tBBM Break before make time delay VCC1 = 3.3V ± 10%, see Figure 24, D1 & D2 connected to 50- 140 ns Ω pull-up resistors. 6.10 RS-485 Driver Switching Characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tPLH, tPHL Propagation delay 205 340 tsk(p) Pulse skew (|tPHL – tPLH|) 1.5 See Figure 15 ns tr Differential output signal rise time 120 185 300 tf Differential output signal fall time 120 180 300 tPHZ Propagation delay, high-level-to-high-impedance output 205 See Figure 16 tPZH Propagation delay, high-impedance-to-high-level output 530 ns tPLZ Propagation delay, low-level to high-impedance output 330 See Figure 17 tPZL Propagation delay, high-impedance-to-low-level output 530 6 Submit Documentation Feedback Copyright © 2010–2015, Texas Instruments Incorporated Product Folder Links: ISO35T |
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