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發表於 2012-8-26 20:50:50
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顯示全部樓層
看晶片就了解了，如以下：
http://www.datasheetcatalog.org/datasheets2/55/55571_1.pdf
部份內容：
The ES2839/ES2840 is a high-performance, two-chip, hostbased modem solution that delivers high connectivity and
throughput, using a solid-state DAA instead of a traditional
transformer DAA. The chipset consists of the ES2839 TeleDriveâ
modem chip and the ES2840, its accompanying high-voltage,
solid-state DAA device. Together, the ES2839 and ES2840
devices comprise a very low-cost modem solution for add-in
cards, desktops, and notebooks. |
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