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VSC8541-02 데이터시트(PDF) 78 Page - Microchip Technology

부품명 VSC8541-02
상세설명  Single Port Gigabit Ethernet Copper PHY with GMII/RGMII/MII/RMII Interfaces
PDF  101 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

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Electrical Specifications
VMDS-10513 VSC8541-02 Datasheet Revision 4.1
69
Figure 24 •
Test Circuit for Recovered Clock Outputs Signal
5.2.3
CLKOUT
This section provides the AC characteristics for the CLKOUT signal.
The following table shows the AC specifications for the CLKOUT output.
5.2.4
RMII_CLKOUT
This section provides the AC characteristics for the RMII_CLKOUT signal.
Note: The RMII_CLKOUT signal is provided on the RX_CLK pin (see Table 3, page 6) when the device is
operating in RMII mode.
The following table shows the AC specifications for RMII_CLKOUT.
Table 101 •
CLKOUT AC Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Condition
CLKOUT frequency
ƒ
125
MHz
CLKOUT frequency
ƒ
50
MHz
CLKOUT frequency
ƒ
25
MHz
CLKOUT cycle time
tCOCYC
8ns
CLKOUT cycle time
tCOCYC
20
ns
CLKOUT cycle time
tCOCYC
40
ns
Frequency stability
ƒSTABILITY
5
ppm
Relative to device
REFCLK frequency
Duty cycle
DC
40
50
60
%
CLKOUT at 25 MHz
and 125 MHz
Duty cycle
DC
35
50
75
%
CLKOUT at 50 MHz
Clock rise time and fall time
tR, tF
1.5
ns
20% to 80%
Peak-to-peak jitter
JPPCLKOUT
700
ps
10 k samples
Table 102 •
RMII_CLKOUT AC Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
RMII_CLKOUT frequency
ƒ
50
MHz
RMII_CLKOUT duty cycle
DC
35
65
%
RMII_CLKOUT rise time
tR
1ns
RMII_CLKOUT fall time
tF
1ns
Device Under Test
Signal Measurement Point
50
Ω 1 ns T-line
39
Ω
5.1 pF



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