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SN75177BD Datasheet(PDF) 6 Page - Texas Instruments |
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SN75177BD Datasheet(HTML) 6 Page - Texas Instruments |
6 / 11 page SN75177B, SN75178B DIFFERENTIAL BUS REPEATERS SLLS002C – D2606, JULY 1985 – REVISED FEBRUARY 1993 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–6 PARAMETER MEASUREMENT INFORMATION VOC 2 RL 2 RL VOD2 VOL VOH –IOH +IOL VID Figure 1. Driver VOD and VOC Figure 2. Receiver VOH and VOL VOLTAGE WAVEFORMS 50% ttD tdD 1.5 V 10% ttD ≈ 2.5 V ≈ – 2.5 V 90% 50% Output tdD 0 V 3 V 1.5 V Input TEST CIRCUIT Output (see Note B) CL = 50 pF RL = 54 Ω 50 Ω Generator (see Note A) Figure 3. Driver Differential-Output Test Circuit and Voltage Waveforms VOLTAGE WAVEFORMS tPHZ 1.5 V 2.3 V 0.5 V 0 V 3 V tPZH Output Input 1.5 V S1 0 V or 3 V Output (see Note B) CL = 50 pF TEST CIRCUIT 50 Ω VOH Voff ≈ 0 V (SN75178B) (SN75177B) SN75178B Enable is Active Low RL = 110 Ω Generator (see Note A) Figure 4. Driver Enable and Disable Times VOLTAGE WAVEFORMS 5 V VOL 0.5 V tPZL 3 V 0 V tPLZ 1.5 V 2.3 V 1.5 V Output Input TEST CIRCUIT Output RL = 110 Ω 5 V S1 (see Note B) CL = 50 pF 50 Ω 3 V or 0 V (SN75178B) (SN75177B) SN75178B Enable is Active Low Generator (see Note A) Figure 5. Driver Enable and Disable Times NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR ≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns, ZO = 50 Ω. B. CL includes probe and jig capacitance. |
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