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LTC1346AISW Datasheet(PDF) 5 Page - Linear Technology |
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LTC1346AISW Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page 5 LTC1346A FU CTIO TABLES Transmitter and Receiver Configuration S0 S1 S2 DX ON RX ON Description 0 0 0 — 1, 2, 3 All RX ON, All DX OFF 1 0 0 — — All OFF, Shutdown 0 1 0 1, 2, 3 1, 2 DCE Mode 1 1 0 1, 2, 3 — DCE Mode, All RX OFF 0 0 1 1, 2 1, 2, 3 DTE Mode 1 0 1 1, 2 — DTE Mode, All RX OFF 0 1 1 1, 2, 3 1, 2, 3 All ON 1 1 1 1, 2, 3 — All DX ON, All RX OFF Transmitter INPUTS OUTPUTS CONFIGURATION S0 S1 S2 T Y1 AND Y2 Z1 AND Z2 Y3 Z3 All OFF 0 0 0 X Z Z Z Z Shutdown 1 0 0 X Z Z Z Z DCE or All ON X 1 X 0 0 1 0 1 DCE or All ON X 1 X 1 1 0 1 0 DTE X 0 1 0 0 1 Z Z DTE X 0 1 1 1 0 Z Z Receiver INPUTS OUTPUTS CONFIGURATION S0 S1 S2 A – B R1 AND R2 R3 All Rx ON 0 0 0 ≤ –0.2V 0 0 All Rx ON 0 0 0 ≥0.2V 1 1 Shutdown 1 0 0 X Z Z DCE 0 1 0 ≤ –0.2V 0 Z DCE 0 1 0 ≥0.2V 1 Z Disabled 1 1 0 X Z Z DTE or All ON 0 X 1 ≤ –0.2V 0 0 DTE or All ON 0 X 1 ≥0.2V 1 1 Disabled 1 X 1 X Z Z TEST CIRCUITS CL 1k LTC1346A • F02 SW1 SW2 VCC RECEIVER OUTPUT Figure 2. Receiver Output Enable and Disable Timing Test Load 15pF S0 R 50 Ω 125 Ω Y Z Z Y T 125 Ω 50 Ω 50 Ω LTC1346A • F01 50 Ω A B VOD VOS VOC = (VY + VZ)/2 Figure 1. V.35 Transmitter/Receiver Test Circuit |
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