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VSC7440 Datasheet(PDF) 390 Page - Microsemi Corporation |
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VSC7440 Datasheet(HTML) 390 Page - Microsemi Corporation |
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390 / 444 page  Electrical Specifications VMDS-10492 VSC7440 Datasheet Revision 4.2 373 The following table lists the DC specifications for the 1G transmitter. Applies to the S[4:0]_TXN/P pins. The following table lists the DC specifications for the 1G receiver. Applies to the S[4:0]_RXN/P pins. 6.1.5 SERDES6G This section provides the DC specifications for the 6G transceiver. The transceiver supports the following modes: • 100BASE-FX •SGMII •SFP •PCIe •2.5G The following table lists the DC specifications for the 6G transmitter. Applies to the PCIE_TXN/P and S[6:5]_TXN/P pins. Table 279 • 1G Transmitter Parameter Symbol Minimum Typical Maximum Unit Condition Differential resistance RDIFF 80 100 120 Ω Output voltage high VOH 1050 mV Output voltage low VOL 0mV Differential peak-to-peak output voltage1 1. Output amplitude is configurable in 16 steps. VO_DIFF 300 800 mVppd 100BASE-FX, SGMII Differential peak-to-peak output voltage1 VO_DIFF 500 1200 mVppd SFP Differential peak-to-peak output voltage1 VO_DIFF 800 1100 mVppd 1000BASE-KX Differential peak-to-peak output voltage with Tx disabled VOD_IDLE 30 mVppd Table 280 • 1G Receiver Parameter Symbol Minimum Typical Maximum Unit Condition Differential resistance RDIFF 80 100 120 Ω Absolute input voltage range VIN –25 1200 mV Common-mode voltage VCM_AC 0VDD_A mV AC-coupled operation1 1. Compatibility to SGMII transmitters requires external AC-coupling. The maximum common-mode voltage is provided without a differential signal. It is limited by the minimum and maximum input voltage range and the input’s signal amplitude. Common-mode voltage VCM_DC 0.7 × VDD_A mV DC-coupled operation2, 3 2. For information about optional DC-coupling, contact your Microsemi sales representative. 3. Common-mode termination disabled. The maximum differential peak-to-peak input is limited by the maximum input voltage range. Differential peak-to-peak input voltage VIN_DIFF 100 1600 mVppd See note 4 4. Applies to all supported modes. For 100BASE-FX, disable internal AC-coupling. Table 281 • 6G Transmitter Parameter Symbol Minimum Typical Maximum Unit Condition Differential resistance RDIFF 80 100 120 Ω Output voltage high VOH VDD_VS mV |
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