Si57x-EVB
Rev. 0.2
9
1.9. Si57x Daughterboard
The Si57x daughterboard can accommodate either Si570/571/598/599 devices and supports all output formats. All
Si570 and Si598 XOs are pin and register compatible, and all Si571 and Si599 VCXOs are pin and register
compatible. Typically, the boards are shipped without the sample device or any output components. Table 4 lists
suggested output loading options for different output formats and coupling configurations.
Table 4. Si57x Daughterboard Output Loading Options
Output
Format
Config
REF DES
Location
Value
Comments
CML
AC coupling
only
C2,C3
0.1 µF
ac coupling capacitors
CMOS
Near end load
on board
J3
CONN, HEADER, 2X1 High Z probe test point
R3
15 pF
Install 0603 load capacitor at resistor location.
Far end
load off board
C3
33–50
Install 0603 source impedance matching resis-
tor at capacitor location for driving transmission
line.
LVDS
AC coupling
C2, C3
0.1 µF
ac coupling capacitors
DC coupling
C2, C3
0
Install 0603 resistors at cap locations.
LVPECL
AC coupling
C2, C3
0.1 µF
ac coupling capacitors
R2, R3
130–150
Local bias resistors
DC coupling
C2, C3
0
Install 0603 resistors at cap locations.
Summary of Contents for Si57-EVB Series
Page 5: ...Si57x EVB Rev 0 2 5 Figure 2 Si57x EVB Motherboard LED Locations...
Page 21: ...Si57x EVB Rev 0 2 21 Figure 13 Si57x EVB MB Primary Side...
Page 22: ...Si57x EVB 22 Rev 0 2 Figure 14 Si57x EVB MB GND Plane 1...
Page 23: ...Si57x EVB Rev 0 2 23 Figure 15 Si57x EVB MB 57x_VDD Plane...
Page 24: ...Si57x EVB 24 Rev 0 2 Figure 16 Si57x EVB MB 5 3 3 V Plane...
Page 25: ...Si57x EVB Rev 0 2 25 Figure 17 Si57x EVB MB GND Plane 2...
Page 26: ...Si57x EVB 26 Rev 0 2 Figure 18 Si57x EVB MB Secondary Side...
Page 27: ...Si57x EVB Rev 0 2 27 Figure 19 Si57x EVB MB Silkscreen Side B...
Page 28: ...Si57x EVB 28 Rev 0 2 7 2 Si57x EVB Daughterboard Figure 20 Si57x EVB DB Silkscreen Side A...
Page 29: ...Si57x EVB Rev 0 2 29 Figure 21 Si57x EVB DB Primary Side...
Page 30: ...Si57x EVB 30 Rev 0 2 Figure 22 Si57x EVB DB GND Plane...
Page 31: ...Si57x EVB Rev 0 2 31 Figure 23 Si57x EVB DB 57x_VDD Plane...
Page 32: ...Si57x EVB 32 Rev 0 2 Figure 24 Si57x EVB DB Secondary Side...
Page 33: ...Si57x EVB Rev 0 2 33 Figure 25 Si57x EVB DB Silkscreen Side B...
