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SN75112DE4 Datasheet(PDF) 9 Page - Texas Instruments |
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SN75112DE4 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 18 page SN55110A, SN75110A, SN75112 DUAL LINE DRIVERS SLLS106G − DECEMBER 1975 − REVISED NOVEMBER 2004 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION using the SN75112 as a CCITT-recommended V.35 line driver The SN75112 dual line driver, the SN75107A dual line receiver, and some external resistors can be used to implement the data-interchange circuit of CCITT recommendation V.35 (1976) modem specification. The circuit of one channel is shown in Figure 5 and meets the requirement of the interface as specified by Appendix 11 of CCITT V.35 and is summarized in Table 1 (V.35 has been replaced by ITU V.11). Table 1. CCITT V.35 Electrical Requirements GENERATOR MIN MAX UNIT Source impedance, Zsource 50 150 Ω Resistance to ground, R 135 165 Ω Differential output voltage, VOD 440 660 mV 10% to 90% rise time, tr 40 ns or 0.01 × ui† Common-mode output voltage, VOC −0.6 0.6 V LOAD (RECEIVER) MIN MAX UNIT Input impedance, ZI 90 110 Ω Resistance to ground, R 135 165 Ω † ui = unit interval or minimum signal-element pulse duration Data Out 1Y Data In 1B Enable 1C 1A R3 390 Ω R1 1.3 k Ω R5 75 Ω R4 390 Ω R2 1.3 k Ω R6 50 Ω R7 50 Ω R8 100 pF All resistors are 5%, 1/4 W. 5 V 5 V 5 V 5 V 13 12 1/2 SN75112 1 2 10 3 100 pF 1Y 1Z 1 2 125 Ω 1A 1B 1/2 SN75107A Enable 1G 4 5 6 Strobe Figure 5. CCITT-Recommended V.35 Interface Using the SN75112 and SN75107A |
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