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M377 as u310 and u410 in 11a52.jpg|M377 in an [[11A52]], as U310 and U410. Each M377 chip has a differential output impedance of 200 Ω. The two chips' outputs are in parallel, driving the output pins of the plug-in with a differential impedance of 100 Ω, or 50 Ω per side. | M377 as u310 and u410 in 11a52.jpg|M377 in an [[11A52]], as U310 and U410. Each M377 chip has a differential output impedance of 200 Ω. The two chips' outputs are in parallel, driving the output pins of the plug-in with a differential impedance of 100 Ω, or 50 Ω per side. |