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VSC8541-02 bảng dữ liệu(PDF) 82 Page - Microchip Technology

tên linh kiện VSC8541-02
Giải thích chi tiết về linh kiện  Single Port Gigabit Ethernet Copper PHY with GMII/RGMII/MII/RMII Interfaces
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VSC8541-02 bảng dữ liệu(HTML) 82 Page - Microchip Technology

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Electrical Specifications
VMDS-10513 VSC8541-02 Datasheet Revision 4.1
73
Figure 29 •
MII Receive Timing
5.2.11
Uncompensated RGMII
The following table lists the characteristics when using the device in RGMII uncompensated mode. For
more information about the RGMII uncompensated timing, see Figure 30, page 74.
Table 109 •
Uncompensated RGMII AC Characteristics
Parameter
Symbol
Minimum Typical Maximum Unit Condition
Clock frequency
fCLK
125
25
2.5
MHz 1000BASE-T operation
100BASE-TX operation
10BASE-T operation
Duty cycle
DC
40
50
60
%
Data to clock output skew (at
Transmitter)1
1.
When operating in uncompensated mode, the PC board design requires a clock to be routed such that an additional trace delay
of greater than 1.5 ns is added to the associated clock signal.
tSKEWT
–500
500
ps
Data to clock output skew (at
Receiver)1
tSKEWR1
1.8
2.6
ns
TX_CLK switching threshold
VTHRESH
0.75
0.90
1.25
1.65
V
VDDMAC = 1.5 V
VDDMAC = 1.8 V
VDDMAC = 2.5 V
VDDMAC = 3.3 V
Clock/data output rise and fall
times
tR, tF
0.75
ns
VDDMAC = 1.5 V,
27E2.7:5 = 111
VDDMAC = 1.8 V,
27E2.7:5 = 111
VDDMAC = 2.5 V,
27E2.7:5 = 100
VDDMAC = 3.3 V,
27E2.7:5 = 100
RX_CLK
RXD[3:0]
RX_DV
RX_ER
tSU
tH
Valid Data



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