参数资料
型号: MIC2550YTS TR
厂商: Micrel Inc
文件页数: 11/11页
文件大小: 0K
描述: IC USB TRANSCEIVER 14-TSSOP
标准包装: 2,500
类型: 收发器
驱动器/接收器数: 1/1
规程: USB 2.0
电源电压: 4 V ~ 5.25 V
安装类型: 表面贴装
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 14-TSSOP
包装: 带卷 (TR)
其它名称: MIC2550YTSTR
MIC2550YTSTR-ND
March 2005
9
M9999-031805
MIC2550
Micrel, Inc.
PCB Layout Recommendations
Although the USB standard and applications are not based in
an impedance controlled environment, a properly designed
PCB layout is recommended for optimal transceiver perfor-
mance. The suggested PCB layout hints are as follows:
Match signal line traces (VP/VM, D+, D–) to
40ps, approximately 1/
3 inch if possible. FR-4
PCB material propagation is about 150ps/inch,
so to minimize skew try to keep VP/VM, D+/D–
traces as short as possible.
For every signal line trace width (w), separate
the signal lines by 1.5–2 widths. Place all other
traces at >2 widths from all signal line traces.
Maintain the same number of vias on each
differential trace, keeping traces approximately
at same separation distance along the line.
Control signal line impedances to ±10%.
Keep R
S as close to the IC as possible, with
equal distance between R
S and the IC for both
D+ and D–.
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