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XRT5894IV Datasheet(PDF) 8 Page - Exar Corporation |
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XRT5894IV Datasheet(HTML) 8 Page - Exar Corporation |
8 / 19 page XRT5894 8 Rev. 1.10 Disabling Output Drivers Output drivers may be individually disabled (hi-z output) by either of the following methods. 1. Either connect the transmit data inputs TXPOS and TXNEG for the channel to be disabled to a log- ic 1 source (VCC), or allow them to float (inputs have internal pull--up resistors). 2. Connect TXCLK for the channel to be disabled to logic 0 source (Ground), and also apply data to the TXPOS and TXNEG inputs of that channel. TRANSFORMER REQUIREMENTS Turns Ratio Line Impedance 1:2 CT 75W or 120W Table 1. Input Transformer Requirements Turns Ratio Line Impedance 1:2 75W or 120W Table 2. Output Transformer Requirements Note: The same type 1:2 CT ratio device may be used at both receiver input and transmitter output. The following transformers have been tested with the XRT5894: HALO type TG26-1205(package contains two 1 CT:2 CT ratio transformers) Pulse type PE-65535 (1:2 CT ratio) Transpower Technologies type TTI 7154-R (1:2 CT ratio) Magnetic Supplier Information: HALO Electronics, Inc. P.O. Box 5826 Redwood City, CA 94063 Tel. (415) 568-5800 Fax. (415)568-6161 Pulse Telecom Product Group P.O. Box 12235 San Diego, CA 92112 Tel. (619) 674-8100 Fax. (619) 674-8262 Transpower Technologies, Inc. 24 Highway 28, Suite 202 Crystal Bay, NV 89402--0187 Tel. (702) 831--0140 Fax. (702) 831--3521 |
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