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SN75976A2DGGR Datasheet(PDF) 11 Page - Texas Instruments |
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SN75976A2DGGR Datasheet(HTML) 11 Page - Texas Instruments |
11 / 35 page SN75976A, SN55976A 9-CHANNEL DIFFERENTIAL TRANSCEIVER SLLS218B – MAY 1995 – REVISED MAY 1997 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION IO IO VOD VO VO B+ B– A II 15 pF 15 pF 75 Ω 165 Ω 375 Ω 375 Ω S1 S2 165 Ω SN75976A = 5 V SN55976A = 4.5 V AB VI Input (see Note A) † † CDE0 and DE/RE are at 2 V, BSR is at 0.8 V and, for the SN75976A only, all others are open. ‡ For the SN75976A only, all nine drivers are enabled, similarly loaded, and switching. Figure 1. Driver Test Circuit, Currents, and Voltages‡ 1.5 V 1.5 V 90% 90% 10% 10% 0V 0V tPLH tPHL 3 V 0 V VOD(H) VOD(L) S1 to A or B Input Output, VOD tr tf Figure 2. Driver Delay and Transition Time Test Waveforms Generator (see Note A) Generator (see Note A) 50 Ω 50 Ω VID Input B – IO VO † CDE0, CDE1, CDE2, BSR, CRE, and DE/RE at 0.8 V CL = 15 pF Output Input B + † ‡ For the SN75976A only, all nine receivers are enabled and switching. Figure 3. Receiver Propagation Delay and Transition Time Test Circuit‡ NOTES: A. All input pulses are supplied by a generator having the following characteristics: tr ≤ 6 ns, tf ≤ 6 ns, PRR ≤ 1 MHz, duty cycle = 50%, ZO = 50 Ω. B. All resistances are in Ω and ± 5%, unless otherwise indicated. C. All capacitances are in pF and ± 10%, unless otherwise indicated. D. All indicated voltages are ± 10 mV. |
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