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ISO1176TDWR Datasheet(PDF) 5 Page - Texas Instruments |
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ISO1176TDWR Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 27 page  ISO1176T www.ti.com SLLSE28E – OCTOBER 2010 – REVISED AUGUST 2011 RS-485 DRIVER SWITCHING CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tPLH, tPHL Prop delay time 23 35 VCC1 = 5V ± 10%, ns VCC2 = 5V ± 5% tsk(p) Pulse skew (|tPHL – tPLH|) 2 5 tPLH, tPHL Prop delay time 25 40 VCC1 = 3.3V ± 10%, See Figure 10 ns VCC2 = 5V ± 5% tsk(p) Pulse skew (|tPHL – tPLH|) 2 5 tr Differential output signal rise time 2 3 7.5 ns tf Differential output signal fall time 2 3 7.5 tpDE DE to ISODE prop delay See Figure 14 30 ns tt(MLH) , tt(MHL) Output transition skew See Figure 11 1 ns tp(AZH), tp(BZH), Propagation delay, high-impedance-to-active output 80 See Figure 12 and tp(AZL), tp(BZL) Figure 13, ns tp(AHZ), tp(BHZ), CL = 50pf, RE at 0 V Propagation delay, active-to-high-impedance output 80 tp(ALZ), tp(BLZ) | tp(AZL) – tp(BZH) | Enable skew time 0.55 1.5 ns | tp(AZH) – tp(BZL) | t(CFB) Time from application of short-circuit to current fold back See Figure 9 0.5 µs t(TSD) Time from application of short-circuit to thermal shutdown See Figure 9, TA = 25°C 100 µs RECEIVER ELECTRICAL CHARACTERISTICS over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT(+) Positive-going input threshold voltage IO = –8mA –80 -10 See Figure 16 VIT(–) Negative-going input threshold voltage IO = 8mA –200 –120 mV Vhys Hysteresis voltage (VIT+ – VIT–) 25 IOH = -8mA VCC1 – 0.4 3 VID = 200 mV, See VOH High-level output voltage V VCC1 = 3.3V ± Figure 16 IOH = -20µA VCC1 – 0.1 3.3 10% and VCC2 = IOL = 8mA 0.2 0.4 VID = -200 mV, See 5V ± 5% VOL Low-level output voltage V Figure 16 IOL = 20µA 0 0.1 IOH = –8mA VCC1 – 0.8 4.6 VID = 200 mV, See VOH High-level output voltage V Figure 16 IOH = –20µA VCC1 – 0.1 5 VCC1 = 5V ± 10% and VCC2 = V ID = –200 mV, IOL = 8mA 0.2 0.4 5V ± 5% See Figure 16 VOL Low-level output voltage V IOL = 20µA 0 0.1 VCC2 = 4.75V IA, IB or 5.25V VI = –7 or 12V, Bus pin input current –160 200 µA Other input = 0 V IA(off), VCC2 = 0V IB(off) II Receiver enable input current RE = 0 V –50 50 µA IOZ High-impedance state output current RE = VCC1 –1 1 µA RID Differential input resistance A, B 60 k Ω Test input signal is a 1MHz sine CID Differential input capacitance wave with 1Vpp amplitude. CD is 7 10 pF measured across A and B. CMR Common mode rejection See Figure 19 4 V Copyright © 2010–2011, Texas Instruments Incorporated 5 |
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