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RGMII 125Mhz信号，rx tx都大约8bit，1.8v转2.5v，哪颗芯片合适？还有转换芯片的开关传输信号质量（频率、延迟）是不是都很稳定？
是否可以看看这里的芯片
http://www.ti.com.cn/lsds/ti_zh/interface/repeater-buffer-products.page?paramCriteria=no
可以看下SN74AVC8T245这款，
Maximum Data Rates
170 Mbps (VCCA < 1.8 V or VCCB < 1.8 V)
320 Mbps (VCCA ≥ 1.8 V and VCCB ≥ 1.8 V)
