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AD9574 Datasheet(PDF) 23 Page - Analog Devices

Part # AD9574
Description  Ethernet/Gigabit Ethernet Clock Generator
PDF  35 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9574 Datasheet(HTML) 23 Page - Analog Devices

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Data Sheet
AD9574
Rev. B | Page 23 of 35
PPR2—OUT0 and OUT1 Configuration
The PPR2 pin allows the user to select from a predefined set of
configurations for the OUT0 and OUT1 channels per Table 23.
The output configuration includes the type of output driver and
a frequency scale factor that indicates whether the output
frequency is the same or twice the input reference frequency.
See the Output Drivers section for details regarding output
driver types.
PPR3—OUT4 and OUT5 Configuration
The PPR3 pin allows the user to select from a predefined set of
configurations for the OUT4 and OUT5 channels per Table 24.
The output configuration includes the frequency (in MHz) and
type of output driver assignment (see the Output Drivers section
for details regarding output driver types). Note that the state of
PPR1 (frequency translation options) determines the frequency
pair available for assignment to the OUT4 and OUT5 channels.
Table 23. PPR2—OUT0/OUT1 Options
PPR2 State
OUT0
OUT1
Driver
Scale
Driver
Scale
0
HSTL
1
HSTL
1
1
HSTL
2
HSTL
1
2
3.3 V CMOS
2
3.3 V CMOS
1
3
3.3 V CMOS
1
3.3 V CMOS
1
4
Disabled
Not applicable
Disabled
Not applicable
5
3.3 V CMOS
1
Disabled
Not applicable
6
HSTL
2
Disabled
Not applicable
7
HSTL
1
Disabled
Not applicable
Table 24. PPR3—OUT4/OUT5 Options
PPR State
OUT4
OUT5
PPR1
PPR3
Driver
fOUT4 (MHz)
Driver
fOUT5 (MHz)
0 or 1
0
HSTL
100
HSTL
125
1
HCSL
100
HCSL
100
2
HCSL
100
HSTL
125
3
LVDS
125
LVDS
125
4
HSTL
125
HSTL
125
5
LVDS
100
HCSL
100
6
HSTL
100
HSTL
100
7
Disabled
Not applicable
Disabled
Not applicable
2 or 3
0
HSTL
312.5
HSTL
312.5
1
LVDS
312.5
LVDS
312.5
2
HCSL
312.5
HCSL
312.5
3
HSTL
312.5
HSTL
125
4
LVDS
312.5
LVDS
125
5
HCSL
312.5
HCSL
125
6
LVDS
312.5
HSTL
125
7
HCSL
125
HCSL
125
4 or 5
0
HSTL
38.88
HSTL
77.76
1
LVDS
38.88
LVDS
77.76
2
LVDS
38.88
LVDS
38.88
3
HSTL
38.88
HSTL
38.88
4
HSTL
77.76
HSTL
77.76
5
LVDS
77.76
LVDS
77.76
6
Disabled
Not applicable
HSTL
38.88
7
Disabled
Not applicable
Disabled
Not applicable
6 or 7
0
HSTL
80
HSTL
80
1
LVDS
80
HSTL
80
2
LVDS
80
LVDS
160
3
Disabled
Not applicable
HSTL
80
4
LVDS
80
LVDS
80
5
HSTL
80
HSTL
160
6
Disabled
Not applicable
HSTL
160
7
Disabled
Not applicable
Disabled
Not applicable



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