Silicon Laboratories Si5338-EVB User manual

Rev. 1.4 11/11 Copyright © 2011 by Silicon Labs Si5338-EVB
Si5338-EVB
Si5330/34/35/38 EVALUATION BOARD USER’SGUIDE
Description
The Si5338-EVB is used for evaluating the Si5330/34/
35/38 family of any-frequency, any-output clock
generators and clock buffers.
EVB Features
Fully powered from a single USB port.
Onboard 25 MHz XTAL allows standalone
asynchronous operation on the Si5334/35/38.
GUI programmable VDD supply allows device to
operate from 3.3, 2.5, or 1.8 V.
GUI programmable VDDO supplies allow each of the
four outputs to have its own supply voltage
selectable from 3.3, 2.5, 1.8, or 1.5 V
GUI-controlled voltage, current, and power
measurements of VDD and all four VDDO supplies.
Voltage supply jumpers allow easy access for use of
external supplies or current measurements.
Input signal jumpers allow external control of pin
functions such as output enable, phase inc/dec,
frequency inc/dec, and I2C_LSB.

Si5338-EVB
2 Rev. 1.4
1. Functional Block Diagram
A functional block diagram of the EVB is shown in Figure 1. The MCU performs the USB to I2C conversion,
controls the voltage regulators, monitors the INTR pin, and controls the four status LEDS. It also provides control of
the eight input pins when the INx_CTRL jumpers are populated. There are five programmable voltage regulators
(VDD, VDDO0, VDDO1, VDDO2, VDDO3), which supply power to the Si533x device. VDD and VDDO jumpers
allow the option of powering the device from external supplies, or as a convenient point for measuring current. I2C
jumpers allow disconnection of the Si533x device from the I2C bus to allow external control from another I2C
master.
For the Si5334, Si5335, and Si5338 devices, the EVB is shipped with an onboard 25 MHz XTAL to allow
stand-alone asynchronous operation. For Si5335 emulation, synchronization to an external reference is done via
IN1 and IN2. Removal of the XTAL and addition of two 0 ohm resistors is required. IN3, IN4, IN5, and IN6 are not
available as external clock inputs for Si5335.
Figure 1. EVB Functional Block Diagram
2. Quick Start
1. Install the ClockBuilder™ Desktop software and driver (assumes that Microsoft .NET Framework 1.1 is already
installed).
2. Connect a USB cable from the EVB to the PC where the software was installed.
3. Leave the jumpers as installed from the factory, and launch the software by clicking on Start Programs 
Silicon Laboratories ClockBuilder Desktop. Click one of the shortcuts in the group.
XTAL
MCU
USB
Connector
0
* indicates unpopulated components
IN1
0IN2
IN5
IN6
IN3
IN4
*
*CLK0A
CLK0B
VDDO0
VReg
VReg
VReg
VReg
CLK1A
CLK1B
VDDO1
term*
term*
term*
term*
CLK2A
CLK2B
VDDO2
term*
term*
CLK3A
CLK3B
VDDO3
term*
term*
Si5338
VReg
term*
term*
VDD
To
I2C
Bus
IN7/SCL
IN8/SDA
INx_CTRL
Jumpers
I2C Bus
To
I2C
Bus
Status
LEDs
Reset
Switch
VDDO
Jumpers
INTR
I2C
Jumpers
VDD
Jumpers

Si5338-EVB
Rev. 1.4 3
3. Jumpers
The Si5338-EVB is shipped with jumpers installed on the following positions:
VDD—Connects the Si533x VDD pin to the VDD programmable voltage regulator.
VDDO0—Connects the Si533x VDDO0 pin to the VDDO0 programmable voltage regulator.
VDDO1—Connects the Si533x VDDO1 pin to the VDDO1 programmable voltage regulator.
VDDO2—Connects the Si533x VDDO2 pin to the VDDO2 programmable voltage regulator.
VDDO3—Connects the Si533x VDDO3 pin to the VDDO3 programmable voltage regulator.
SCL—Connects the Si533x SCL pin to the I2C bus from the MCU.
SDA—Connects the Si533x SDA pin to the I2C bus from the MCU.
The INx-CTRL jumpers are optional jumpers for enabling MCU control of the Si533x input pins. This feature may
be available in future software releases.
4. Status LEDS
There are four status LEDs on the Si5338-EVB:
RDY (Green)—Indicates that the EVB is operating normally. This LED should always be on.
I2C(Green)—Indicates when there is active I2C communication between the MCU and the Si533x device
or between the MCU and voltage regulators.
USB (Green)—Indicates when there is active communication between the PC and the MCU over the USB
bus.
INTR (Red)—The MCU has detected that the interrupt pin of the Si533x device is enabled. The most
probable cause for an interrupt is because the Si533x has lost its input signal or the PLL has lost lock. The
“Status” tab of the GUI will identify the event that caused the interrupt to occur.

Si5338-EVB
4 Rev. 1.4
5. Inputs
The Si5338-EVB has six SMA connectors (IN1-IN6) for receiving external signals. Two of the signals are
differential, and two are single-ended.
5.1. Differential Inputs (IN1/IN2, IN5/IN6)
The differential inputs only need a differential voltage swing of 300 mV to operate, which makes them compatible
with most differential signal types. See “AN408: Termination Options for Any-Frequency, Any-Output Clock
Generators and Clock Buffers—Si5338, Si5334, Si5330”, or Si5335 data sheet if applicable, for details on
interfacing with compatible signal types. It is also possible to lock the Si5334/35/38 to an external signal generator
using one side of the differential input and grounding its complementary side. Take care not to exceed the max
differential voltage of 1.2 V on these inputs. The board is shipped with a 25 MHz XTAL connected to IN1/IN2. The
XTAL removal and resistor changes are required for Si5335 evaluation with an input clock since only IN1 and IN2
are available for input clocking with Si5335. Note that regardless of device, any external input to IN1 & IN2 must be
limited to 1.2 V peak-to-peak (see Figure 2 for resistor locations). When evaluating the Si5330, the XTAL must be
removed. The differential input on pins IN5/IN6 is ac-coupled with a 100 line termination (R39).
Figure 2. Optional Termination Resistors for Differential Inputs IN1/IN2
5.2. Single-Ended Inputs (IN3, IN4) [Not supported in Si5335]
These inputs are dc-coupled to the device. They are compatible with a signal swing as low as 100 mV and a
maximum of 3.63 V. The signal should have a minimum amount of dc bias to ensure that it is never below ground
level.
The EVB provides pads for optional input terminations. These may be necessary when interfacing to SSTL and
HSTL signals.
Note: For details on populated vs. non-populated components, refer to "9. Bill of Materials" on page 13.

Si5338-EVB
Rev. 1.4 5
6. Outputs (CLKxA/CLKxB)
Each of the four differential output drivers is capacitively coupled to the SMA connectors; so, the output signal will
have no dc bias. If a signal with dc bias is required, the ac coupling capacitors can be replaced with a 0 resistor.
The EVB provides pads for optional output terminations. These may be necessary when interfacing to SSTL and
HSTL signals.
6.1. Evaluating LVPECL Output Clocks
The EVB by default is populated to allow evaluating of all output clock formats with the exception of LVPECL
outputs. To evaluate LVPECL signals on the Si5338-EVB, a few components must be soldered down on the board.
Take CLK0 for example of. Note that CLK0 has R85, R121/R122, R1/R4, R2/R5, R3/R6, C4/C7, and C15/C17
attached to the nets of interest. The EVB comes with only R121/R122 and C15/C17 installed. This allows support
of all output types except LVPECL.
Evaluating an ac-coupled LVPECL clock on CLK0 requires a bias resistor of 130 or 200 to ground on each of the
output lines depending on driver VDDO. Refer to AN408, or Si5335 data sheet if applicable, for termination details.
Make the following changes depending on the CLK0 VDDO voltage:
For 3.3 V LVPECL (ac-coupled)
· Place 200 resistors in place of R1 and R4.
· Place 0 resistors in place of C4 and C7.
For 2.5 V LVPECL (ac-coupled)
· Place 130 resistors in place of R1 and R4.
· Place 0 resistors in place of C4 and C7.
The LVPECL output may also be dc-coupled to an LVPECL receiver. To dc-couple the CLK0 output, make the
component changes below. Note that R2, R3, R5, and R6 depend on VDDO.
Place 0 resistors in place of C15 and C17.
Place 50 resistors in place of R1 and R4.
Place C4 and C7
Select R2 and R3 (and similarly R5 and R6) to give a termination voltage of VTT = VDDO – 2 V.
For LVPECL termination on CLK1, 2, and 3 follow the guidelines above and refer to the schematics in “8.
Si5338-EVB Schematics” as needed.
6.2. Evaluating SSTL/HSTL Output Clocks
To support SSTL/HSTL outputs, either single-ended or differential, replace the output dc blocking capacitors with a
0resistor. For example, for CLK0 output, replace C15 with 0 resistor for single-ended, or replace both C15 &
C17 with 0 for differential output. Do the same for CLK1,2,3 as needed. Remember to properly terminate at the
receiver input.
The Si5338-EVB can support on-board termination of SSTL/HSTL outputs, if on-board terminated, measurement
of the clock output at the SMA connector would require a high impedance measurement device to prevent
overloading of the output. If on-board output termination is desired, the following components must be installed
(using CLK0 as an example.)
For 1.8 or 2.5 V VDDO: R2 = 2 k, R3 = 2 k, R1 = 50 , C4 = 0.1 µF
For 3.3 V VDDO: R2 = 2.42 k, R3 = 2 k, R1 = 50 , C4 = 0.1 µF
Follow similar guidelines for CLK1,2,3 as required. Refer to AN408, or Si5335 data sheet if applicable, for more
details on clock termination.

Si5338-EVB
6 Rev. 1.4
7. ClockBuilder Desktop Software Installation
The following sections describe how to install and begin using the software. There is also a readme.txt file with the
installation files as well as a user guide installed with the software.
Download the latest versions of the EVB documentation and the ClockBuilder Desktop software for this EVB by
visiting the following:
EVB User's Guide and documentation set: www.silabs.com/Si5338-EVB.
ClockBuilder Desktop Software: www.silabs.com/ClockBuilder.
7.1. System Requirements
Microsoft Windows 2000 or Windows XP
USB 2.0
2 MB of free hard drive space
1024 x 768 screen resolution or greater
Microsoft .NET Framework 1.1
USBXpress 3.1.1 driver
Note: USBXpress 3.1.1 driver is provided and installed with the software. Newer or older versions of USBXpress available
from other EVB kits or online have not been tested with this software.
7.2. Microsoft .NET Framework Installation
The Microsoft .NET Framework is required before installing and running the software. Details and installation
information about the .NET Framework are available via a shortcut in the NETFramework directory or at the
following website:
http://www.microsoft.com/downloads/
details.aspx?FamilyId=262D25E3-F589-4842-8157-034D1E7CF3A3&displaylang=en
There are multiple versions of the .NET Framework available from Microsoft, and they can be installed side-by-side
on the same computer. The software requires version 1.1. Contact your system administrator for more details.
7.3. ClockBuilder Desktop Software Installation
The ClockBuilder Desktop Software is installed from the ClockBuilderDesktopSwInstall.exe file.
1. Double-click the install file to start the wizard.
2. Follow the wizard instructions to complete the installation for both the software and the driver. Use the default
installation location for best results.
3. After the installation is complete, click on Start Programs Silicon Laboratories ClockBuilder
Desktop Software. Select one of the items in the menu including the User Guide to get more details on how to
run the software.
7.4. ClockBuilder Desktop Software Uninstall Instructions
Close all the programs and help files before running the uninstaller to ensure complete removal of the software.
The driver software must be uninstalled separately. See “7.6. USBXpress Driver Installation” for details. To uninstall
the software, use the Add and Remove Programs utility in the Control Panel, as shown in Figure 3.
Figure 3. Uninstall in Add and Remove Programs

Si5338-EVB
Rev. 1.4 7
7.5. ClockBuilder Desktop Software Description
There are several programs to control the Si533x device. These are available by clicking Start Programs 
Silicon Laboratories ClockBuilder Desktop Software X.X, where X.X is the software version number. There
is a detailed user guide accessible here and in the Help Help Menu option of the software.
Note: Once installation is successful, the Clock Builder Desktop application should be available in the Windows Start menu
program selection. When running Clock Builder Desktop, an opening page allows selection of the desired target device.
Please select the appropriate target device from the list of available devices in order to ensure intended operation.
7.6. USBXpress Driver Installation
The EVB uses the Silicon Labs USBXpress driver to allow the EVB to communicate with the computer via USB.
The driver is installed after the EVB software is installed. Click Install to run the driver installation. Clicking Cancel
will not install any files, and the EVB will not work with the software.
Figure 4. Driver Installer Dialog
Note: If the driver has already been installed on the computer before, it will not be reinstalled, and a message box will appear
as shown in Figure 5.
Figure 5. Driver Already Installed
The installer will copy the necessary driver files and update the operating system. However, for every different EVB
connected to the same computer, the hardware installation wizard will run to associate this driver with the new
EVB. Let the wizard run with its default settings. Figure 6 shows a successful driver installation.
Table 1. Programs
Program Description
ClockBuilder Desktop This automatically programs the necessary registers based on the customer's
desired frequency plan for the Si533x device.
Bit Field Programmer This utility provides access to each bit field in the register map of the device; so, no
masking and shifting is required to decode each setting or control in the register
map.
Register Programmer This provides low-level control of the device with individual 8-bit register accesses.

Si5338-EVB
8 Rev. 1.4
Figure 6. Successful Driver Installation

Si5338-EVB
Rev. 1.4 9
The USBXpress driver may be removed via the Add and Remove Programs utility in the Control Panel. Locate the
entry called Silicon Laboratories USBXpress Device. Click the button, and it should show the version and location
of what it will remove.
Figure 7. Driver Uninstall Location
The USBXpress installation files are located with the ClockBuilder Desktop Software. The driver files for the EVB
may be reinstalled from this location or by running the install software.
Figure 8. Driver Installation Files

Si5338-EVB
10 Rev. 1.4
8. Si5338-EVB Schematics
VDDO1
VDDO3
VDDO2
VDD
VDDO0
+3.3V
VDDO0 VDDO0 VDDO1 VDDO1 VDDO2 VDDO2
VDDO3 VDDO3
SDA_5338 SCL_5338
INTRPT
IN3_DRV
IN4_DRV
IN5_DRV
IN6_DRV
IN1_DRV
IN2_DRV
SCL_DRV
SDA_DRV
Place the 49.9 ohm resistor and .1uf cap very close to the 5338 pins. The 2K resistors can be further away.
Place R close to XTAL pins
Si5338
Dummy XTAL used for trace matching
Place close to output pins
J3 SMA
IN2
J3 SMA
IN2
R33 2K R33 2K
R25 1K R25 1K
R47 49.9 R47 49.9
C8 0.1uF C8 0.1uF
R122 0R122 0
R13 0 R13 0
C44 0.1uF C44 0.1uF
R83 0 R83 0
R1 130 R1 130
R40 2K R40 2K
R128 0R128 0
R26 1K R26 1K
R45 0 R45 0
R12 0R12 0
J8 SMA
IN4
J8 SMA
IN4
R32 130 R32 130
C22 0.1uF C22 0.1uF
R127 0R127 0
C7 0.1uF C7 0.1uF
R117 49.9 R117 49.9
C15 0.1uF C15 0.1uF
C4 0.1uF C4 0.1uF
R86 100R86 100
R126 0R126 0
R84 0 R84 0
C30 0.1uF C30 0.1uF
J9 SMA
CLK2A
J9 SMA
CLK2A
R20 2K R20 2K R36 2K R36 2K
C5 0.1uF C5 0.1uF
R88 100R88 100
R77 0R77 0
R125 0R125 0
R34 2K R34 2K
R124 0R124 0
C18 0.1uF C18 0.1uF
R123 0R123 0
R78 0R78 0
C9 0.1uF C9 0.1uF
J1 SMA
CLK0A
J1 SMA
CLK0A
R39 100 R39 100
C41 0.1uF C41 0.1uF
C14 0.1uF C14 0.1uF C54 0.1uF C54 0.1uF
R82 0 R82 0
R18
49.9
R18
49.9
R116 49.9 R116 49.9
R10 100 R10 100
J13 SMA
IN6
J13 SMA
IN6
J6 SMA
CLK1B
J6 SMA
CLK1B
R19 130 R19 130
R27 2K R27 2K
J2 SMA
IN1
J2 SMA
IN1
R8 130 R8 130
R120 49.9 R120 49.9
R81 0 R81 0
R85 100R85 100
R21 1K R21 1K
J14 SMA
CLK3B
J14 SMA
CLK3B
R29 49.9 R29 49.9
25MHz
U1
25MHz
U1
XTAL1 1
GND 2
XTAL2
3
GND
4
25MHz
U7
25MHz
U7
XTAL1 1
GND 2
XTAL2
3
GND
4
R42 2K R42 2K
C12 0.1uF C12 0.1uF
R121 0R121 0
R44 0R44 0
J7 SMA
IN3
J7 SMA
IN3
R5 2K R5 2K
C11 0.1uF C11 0.1uF
C28 0.1uF C28 0.1uF
C40 0.1uF C40 0.1uF
C53 0.1uF C53 0.1uF
R41 130 R41 130
J4 SMA
CLK0B
J4 SMA
CLK0B
R30 2K R30 2K
R80
0
R80
0
R15 2K R15 2K
R17
49.9
R17
49.9
C3 0.01uF C3 0.01uF
+
C58 10uF
+
C58 10uF
R115 49.9 R115 49.9
R2 2K R2 2K
C24 0.1uF C24 0.1uF
R31 2K R31 2K
R87 100R87 100
J5 SMA
CLK1A
J5 SMA
CLK1A
C13 0.1uF C13 0.1uF
R119 49.9 R119 49.9
R7 4.99K R7 4.99K
R28 49.9 R28 49.9
J12 SMA
CLK3A
J12 SMA
CLK3A
R14 130 R14 130
R9 2K R9 2K
TP1
VTT_IN4 Test Point
TP1
VTT_IN4 Test Point
C26 0.01uF C26 0.01uF
R43 2K R43 2K
R6 2K R6 2K
J11 SMA
IN5
J11 SMA
IN5
TP2
VTT_IN3 Test Point
TP2
VTT_IN3 Test Point
R22 1K R22 1K
R35 2K R35 2K
C17 0.1uF C17 0.1uF
C45 0.1uF C45 0.1uF
C27 0.01uF C27 0.01uF
R79 0 R79 0
U2
Si5338
U2
Si5338
GND
25
CLK2A 14
IN4
4
IN6
6
IN3
3
IN5
5
IN2
2
IN1
1
CLK1B 17 CLK1A 18 CLK0B 21 CLK0A 22
VDD 24
VDDO0 20
VDDO1 16
VDDO2 15
VDDO3 11
VDD 7
INTR
8
IN7/SCL
12
IN8/SDA
19
GND
23
CLK3B 9 CLK3A 10 CLK2B 13
R3 2K R3 2K
C20 0.1uF C20 0.1uF
R16 2K R16 2K
R23 1K R23 1K
R4 130 R4 130
R37 130 R37 130
+
C93 10uF
+
C93 10uF
R95 49.9 R95 49.9
TP12
INTR
Test Point
TP12
INTR
Test Point
R38 2K R38 2K
R11 2K R11 2K
R118 49.9 R118 49.9
C23 0.1uF C23 0.1uF
C2 0.01uF C2 0.01uF
R24 1K R24 1K
J10 SMA
CLK2B
J10 SMA
CLK2B
Figure 9. Si5338-EVB Main Schematic

Si5338-EVB
Rev. 1.4 11
IN3_DRIVE IN4_DRIVE
SCL_5338_DRV SDA_5338_DRV
IN1_DRIVE
IN1_DRIVE IN2_DRIVE
IN2_DRIVE
IN5_DRIVE IN6_DRIVE
SCL_5338_DRV SDA_5338_DRV
IN6_EN IN6_DRIVE IN5_EN IN5_DRIVE
IN1_EN
IN2_EN
I2C_5V_EN IN2_EN IN5_EN IN6_EN
I2C_5V_EN
IN1_EN
IN3_DRIVE IN4_DRIVE
+5V_USB
VDD
+3.3V
VDDO1
VDDO2
VDDO3
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
VDDO0
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB +5V_USB +5V_USB +3.3V
+3.3V +3.3V
+3.3V +3.3V
+5V_USB
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V +3.3V
+3.3V
+3.3V
+5V_USB
+3.3V
+5V_USB
VDD_pin
VDDO1_pin
VDDO2_pin
VDDO3_pin
VDDO0_pin
IN1_DRV
SCL_5V SDA_5V
INTRPT
SCL_5V SDA_5V
SCL_5338 SDA_5338
IN2_DRV
IN3_DRV IN4_DRV IN5_DRV
IN6_DRV
SCL_DRV SDA_DRV
SCL_5V SDA_5V
Address is 1001100
MCU
0.9V to 5.5V2.7V to 5.5V
CLKIN
CLKINB
CMOS CMOSFB FBCLK
FBCLKB
SCL SDA
+1.2V +1.2V
+1.2V
+1.2V
+2.5V Ref
Address is 1001101
C47
0.1uF
C47
0.1uF
J16J16
1 2
R63 1.02KR63 1.02K
D1
MMBD3004S-7-F
D1
MMBD3004S-7-F
C51
0.1uF
C51
0.1uF
C49
0.1uF
C49
0.1uF
R96 0 R96 0
R97
825
R97
825
J19 HEADER 2x2 J19 HEADER 2x2
11 33
2
24 4
D4
Green
USB
D4
Green
USB
R50 1K R50 1K
R103 511 R103 511
R61 1K R61 1K
R55 2K R55 2K J18J18
1 2
J20J20
1 2
C42
0.1uF
C42
0.1uF C43
0.1uF
C43
0.1uF
R54 2K R54 2K
NLSV1T244
U5
NLSV1T244
U5
VCCA 1
A
2
GND
3
B5
OEB
4
VCCB 6
+
C48 10uF
+
C48 10uF
C50
0.1uF
C50
0.1uF
C55
0.1uF
C55
0.1uF
ADG728
U13
ADG728
U13
SDA 3
RESETB 2
S1
4
S2
5
S3
6
S4
7
D8
A0 16
S8
9
S7
10
S6
11
S5
12
VDD 13
GND
14
SCL 1
A1 15
R60 1K R60 1K
R49 1.02K R49 1.02K
C34 1uF C34 1uF
R46 1.02K R46 1.02K
J17J17
1 2
C38
0.1uF
C38
0.1uF
C56 0.1uF C56 0.1uF
R69 220R69 220
J23
CONN SOCKET 5x2 Shrouded
J23
CONN SOCKET 5x2 Shrouded
1
122
3
344
5
566
7
788
9
910 10
S1
SW PUSHBUTTON
S1
SW PUSHBUTTON
R67 220 R67 220
C35
0.1uF
C35
0.1uF
R52 2K R52 2K
C59 1uF C59 1uF
R53 2K R53 2K
R621K R621K
C52 1uF C52 1uF
D2
MMBD3004S-7-F
D2
MMBD3004S-7-F
R76 1K R76 1K
U8
C8051F340
U8
C8051F340
VDD 10
REGIN 11
GND
7
VBUS 12
D+
8
D-
9
P0.0
6P0.1 5P0.2 4P0.3 3P0.4 2P0.5 1P0.6
48 P0.7 47
P1.0 46 P1.1 45 P1.2 44 P1.3 43 P1.4 42 P1.5 41 P1.6 40 P1.7 39 P2.0 38 P2.1 37 P2.2 36 P2.3 35 P2.4 34 P2.5 33 P2.6 32 P2.7 31 P3.0 30 P3.1 29 P3.2 28 P3.3 27 P3.4 26 P3.5 25 P3.6 24 P3.7 23 P4.0 22 P4.1 21 P4.2 20 P4.3 19 P4.4 18 P4.5 17 P4.6 16 P4.7 15
RST/C2CK
13
C2D
14
J22J22
1 2
R101 511 R101 511
C37
0.1uF
C37
0.1uF
R99 511 R99 511
D5
Green
I2C
D5
Green
I2C
NLSV1T244
U10
NLSV1T244
U10
VCCA 1
A
2
GND
3
B5
OEB
4
VCCB 6
J21 USB Type B J21 USB Type B
1 2 3 4
5
6
C57 0.1uF C57 0.1uF
J25J25
1 2
C31
0.1uF
C31
0.1uF
R66
412
R66
412
D3
Red
INTR
D3
Red
INTR
+
C87 10uF
+
C87 10uF
R98 511 R98 511
C32
0.1uF
C32
0.1uF
R110 0 R110 0
TP11 GND Test Point TP11 GND Test Point
TP3 SDA Test Point TP3 SDA Test Point
NLSV1T244
U3
NLSV1T244
U3
VCCA 1
A
2
GND
3
B5
OEB
4
VCCB 6
C36
0.1uF
C36
0.1uF
C46
0.1uF
C46
0.1uF
PCA9517A
U6
PCA9517A
U6
VCCA 1
SCLA 2
SDAA 3
GND 4
VCCB
8
SCLB
7
EN
5
SDAB
6
R64 1.02K R64 1.02K
NLSV1T244
U11
NLSV1T244
U11
VCCA 1
A
2
GND
3
B5
OEB
4
VCCB 6
ADG728
U14
ADG728
U14
SDA 3
RESETB 2
S1
4
S2
5
S3
6
S4
7
D8
A0 16
S8
9
S7
10
S6
11
S5
12
VDD 13
GND
14
SCL 1
A1 15
R65 1KR65 1K
J15J15
1 2
C33 4.7uF C33 4.7uF
D6
Green
RDY
D6
Green
RDY
R68 220 R68 220
R111 0 R111 0
2.5V
U4
2.5V
U4
VOUT 1
GND
2
VIN
3
TP4 SCL Test Point TP4 SCL Test Point
J24J24
1 2
C39
0.1uF
C39
0.1uF
R102
825
R102
825
R104
825
R104
825
R100
825
R100
825
R51 1K R51 1K
Figure 10. Si5338-EVB MCU Schematic

Si5338-EVB
12 Rev. 1.4
VDDO1_int_en
VDDO0_int_en
VDDO3_int_en VDDO2_int_en
VDD_int_en
VDD_int_en
VDDO3_int_en
VDDO2_int_en
VDDO1_int_en
VDDO0_int_en
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
+5V_USB
VDD
VDDO0
VDDO1 VDDO2 VDDO3
+3.3V
VDDO0_pin VDDO1_pin
VDDO2_pin VDDO3_pin
VDD_pin
SDA_5V
SCL_5V
SDA_5V
SCL_5V
SDA_5V
SCL_5V
Address is 0101100
Address is 0101101
Address is 0101110
Voltage
Regulators
C84 0.1uF C84 0.1uF
J28 JUMPER J28 JUMPER
1 2
C83 0.01uF C83 0.01uF
R73 10KR73 10K
U17
MAX8869
U17
MAX8869
GND
10
IN
4
OUT 12
RSTB 6
SET
11
SHDNB
7
IN
5
IN
3
IN
2
OUT 13 OUT 14 OUT 15
SS
8
NC
16
NC
9
NC
1
EPAD 17
C66 1uF C66 1uF
+
C63
10uF
+
C63
10uF
J27 JUMPER J27 JUMPER
1 2
R105 10R105 10
U21
MAX8869
U21
MAX8869
GND
10
IN
4
OUT 12
RSTB 6
SET
11
SHDNB
7
IN
5
IN
3
IN
2
OUT 13 OUT 14 OUT 15
SS
8
NC
16
NC
9
NC
1
EPAD 17
R74 47.5K R74 47.5K
TP8 VDDO3 Test Point TP8 VDDO3 Test Point
R71 10K R71 10K
C69
1uF
C69
1uF
TP17 GND Test Point TP17 GND Test Point
J29 JUMPER J29 JUMPER
1 2
C75 0.01uF C75 0.01uF
C91 1uF C91 1uF
C62 1uF C62 1uF
U16
MAX8869
U16
MAX8869
GND
10
IN
4
OUT 12
RSTB 6
SET
11
SHDNB
7
IN
5
IN
3
IN
2
OUT 13 OUT 14 OUT 15
SS
8
NC
16
NC
9
NC
1
EPAD 17
C64 1uF C64 1uF
U20
AD5263
U20
AD5263
GND
8
W4 19
A4 20
B3
4
W3
6
W1
3
A3
5
A1
2
B1
1
B4 21
W2 22
A2 23 B2 24
NC/O2 17
SDO/O1 16
VLOGIC 10
CSB/AD0
13 RESB/AD1 14
SHDN_B 15
VDD 7
DIS
9
SDI/SDA
11
CLK/SCL
12
VSS
18
C73
1uF
C73
1uF
TP16 GND Test Point TP16 GND Test Point
U22
MAX8869
U22
MAX8869
GND
10
IN
4
OUT 12
RSTB 6
SET
11
SHDNB
7
IN
5
IN
3
IN
2
OUT 13 OUT 14 OUT 15
SS
8
NC
16
NC
9
NC
1
EPAD 17
+
C61
10uF
+
C61
10uF
C60 1uF C60 1uF
R106 10R106 10
+
C67
10uF
+
C67
10uF
C81 1uF C81 1uF
TP15 GND Test Point TP15 GND Test Point
R72 10KR72 10K
U18
MAX8869
U18
MAX8869
GND
10
IN
4
OUT 12
RSTB 6
SET
11
SHDNB
7
IN
5
IN
3
IN
2
OUT 13 OUT 14 OUT 15
SS
8
NC
16
NC
9
NC
1
EPAD 17
U23
AD5263
U23
AD5263
GND
8
W4 19
A4 20
B3
4
W3
6
W1
3
A3
5
A1
2
B1
1
B4 21
W2 22
A2 23 B2 24
NC/O2 17
SDO/O1 16
VLOGIC 10
CSB/AD0
13 RESB/AD1 14
SHDN_B 15
VDD 7
DIS
9
SDI/SDA
11
CLK/SCL
12
VSS
18
C80
1uF
C80
1uF
C89 1uF C89 1uF
R109 10R109 10
TP13 VDD Test Point TP13 VDD Test Point
C68
1uF
C68
1uF
TP14 GND Test Point TP14 GND Test Point
C88 1uF C88 1uF
C78 1uF C78 1uF
C72 0.01uF C72 0.01uF
C90 1uF C90 1uF
R75 15.4K R75 15.4K
C71 0.01uF C71 0.01uF
U15
MAX8869
U15
MAX8869
GND
10
IN
4
OUT 12
RSTB 6
SET
11
SHDNB
7
IN
5
IN
3
IN
2
OUT 13 OUT 14 OUT 15
SS
8
NC
16
NC
9
NC
1
EPAD 17
C85
1uF
C85
1uF
TP5 VDDO0 Test Point TP5 VDDO0 Test Point
C86 0.01uF C86 0.01uF
+
C65
10uF
+
C65
10uF
J26 JUMPER J26 JUMPER
1 2
C76 0.01uF C76 0.01uF
TP6 VDDO1 Test Point TP6 VDDO1 Test Point
+
C79
10uF
+
C79
10uF
J30 JUMPER J30 JUMPER
1 2
TP7 VDDO2 Test Point TP7 VDDO2 Test Point
+
C82 10uF
+
C82 10uF
C74 0.1uF C74 0.1uF
C70
1uF
C70
1uF
C77 0.1uF C77 0.1uF
C92 1uF C92 1uF
R70 10K R70 10K
U19
AD5263
U19
AD5263
GND
8
W4 19
A4 20
B3
4
W3
6
W1
3
A3
5
A1
2
B1
1
B4 21
W2 22
A2 23 B2 24
NC/O2 17
SDO/O1 16
VLOGIC 10
CSB/AD0
13 RESB/AD1 14
SHDN_B 15
VDD 7
DIS
9
SDI/SDA
11
CLK/SCL
12
VSS
18
R107 10R107 10
R108 10R108 10
TP10 +3.3V Test Point TP10 +3.3V Test Point
Figure 11. Si5338-EVB Voltage Regulation Schematic

Si5338-EVB
Rev. 1.4 13
9. Bill of Materials
Table 2. Si5338-EVB Bill of Materials
Item NI Qty Reference Value Manufacturer Part Number
1 10 C2,C3,C26,C27,C71,C72,
C75,C76,C83,C86 0.01 µF Venkel C0402X7R100-103M
2 35 C15,C17,C31,C32,C35,C36,C3
7,C38,C39,C40,C41,C42,C43,
C44,C45,C46,C47,C49,C50,C5
1,C53,C54,C55,C56,C57,C74,
C77,C84,C5,C8,C9,C11,C12
0.1 µF Venkel C0402X7R100-104K
C13
4 1 C33 4.7 µF Venkel C1206X7R100-475M
5 3 C34,C52,C59 1 µF Venkel C1206X7R250-105K
6 7 C48,C61,C63,C65,C67, 10 µF Kemet B45196H5106M309
C79,C82
7 17 C60,C62,C64,C66,C68,C69, 1 µF Venkel C0603X7R100-105K
C70,C73,C78,C80,C81,C85,
C88,C89,C90,C91,C92
8 2 D1,D2 MMBD3004S-7-F Diodes Inc. MMBD3004S-7-F
9 1 D3 Red Panasonic LN1271RAL
10 3 D4,D5,D6 Green Panasonic LN1371G
11 14 J1,J2,J3,J4,J5,J6,J7,J8, SMA Johnson
Components 142-0701-801
J9,J10,J11,J12,J13,J14
12 13 J15,J16,J17,J18,J20,J22, JUMPER Samtec TSW-102-07-T-S
J24,J25,J26,J27,J28,J29,J30
13 1 J19 HEADER 2x2 Samtec TSW-102-07-T-D
14 1 J21 USB Type B Tyco 292304-1
15 1 J23 CONN SOCKET 5x2
Shrouded Tyco 5103309-1
18 1 R7 4.99K Venkel CR0402-16W-4991F
19 1 R39 100 Venkel CR0201-20W-1000F
20 7 R44,R45,R77,R78,R96,R110,R
111 0 Venkel CR0402-16W-000
21 2 R28,R29 49.9 Venkel CR0402-16W-49R9F
22 13 R21,R22,R23,R24,R25,R26, 1K Venkel CR0402-16W-102J
R50,R51,R60,R61,R62,R65,R7
6
23 4 R46,R49,R63,R64 1.02K Venkel TFCR0402-16W-E-1021B
25 4 R52,R53,R54,R55 2K Venkel CR0402-16W-2001F
26 1 R66 412 Venkel TFCR0402-16W-E-4120B
27 3 R67,R68,R69 220 Venkel CR0402-16W-221J
28 4 R70,R71,R72,R73 10K Venkel CR0402-16W-103J
29 1 R74 47.5K Venkel CR0603-10W-4752F
30 1 R75 15.4K Venkel CR0603-10W-1542F
31 6 R79,R80,R81,R82,R83,R84 0 Venkel CR0603-16W-000

Si5338-EVB
14 Rev. 1.4
32 4 R97,R100,R102,R104 825 Venkel CR0603-10W-8250F
33 4 R98,R99,R101,R103 511 Venkel CR0603-10W-5110F
34 5 R105,R106,R107,R108,R109 10 Venkel CR2512-2W-10R0D
35 8 R121,R122,R123,R124,
R125,R126,R127,R128 0 Venkel CR0201-20W-000F
36 1 S1 SW PUSHBUTTON Mountain Switch 101-0161-EV
37 1 TP11 Test Point Kobiconn 151-207
38 1 U1 25 MHz Epson FA-238 25.0000MB
39 1 U2 Si5338 SiLabs Si5338N-A-GMR
40 4 U3,U5,U10,U11 NLSV1T244 On Semi NLSV1T244MUTBG
41 1 U4 2.5 V Analog Devices AD1582BRT
42 1 U6 PCA9517A NXP PCA9517AD
43 1 U8 C8051F340 SiLabs C8051F340-GQ
44 2 U13,U14 ADG728 Analog Devices ADG728BRUZ
45 6 U15,U16,U17,U18,U21,U22 MAX8869 MAXIM MAX8869EUE50
46 3 U19,U20,U23 AD5263 Analog Devices AD5263BRUZ20
47 4 Standoffs SPC Technology 2397
48 4 Screws Richco NSS-4-4-01
49 7 Jumpers Sullins SPC02SYAN
Do Not Populate
2NI 9C4,C7,C14,C18, 0.1 µF Venkel C0402X7R100-104K
C22,C23,C20, C24,C28,C30,
6NI 3C58, C93, C87 10 µF Kemet B45196H5106M309
16 NI 8R1,R4,R8,R14,R19,R32,R37, 130 Venkel CR0402-16W-131F
R41
17 NI 20 R2,R3,R5,R6,R9,R11,R15, 2K Venkel TFCR0402-16W-E-2001B
R16,R20,R27,R30,R31,R33,
R34,R35,R36,R38,R40,R42,
R43
19 NI 5R10,R85,R86,R87,R88 100 Venkel CR0201-20W-1000F
20 NI 2R12,R13 0Venkel CR0402-16W-000
24 NI 8R47,R95,R115,R116,R117, 49.9 Venkel CR0402-16W-49R9F
R118,R119,R120
21 NI 2R17,R18 49.9 Venkel CR0402-16W-49R9F
37 NI 12 TP1,TP2,TP3,TP4,TP5,TP6, Test Point Kobiconn 151-207
TP7,TP8,TP9,TP10,TP12,TP13
38 NI 1U7 25 MHz Epson FA-238 25.0000MB-W
Table 2. Si5338-EVB Bill of Materials (Continued)
Item NI Qty Reference Value Manufacturer Part Number

Si5338-EVB
Rev. 1.4 15
DOCUMENT CHANGE LIST
Revision 0.1 to Revision 1.0
Replaced the voltage input terminal block with
programmable regulators.
The board is entirely powered from USB power.
Added an additional LED to indicate MCU
ready.
Added jumpers on all input pins to allow
external control of features, such as output
enable, and frequency and phase increment
and decrement.
Revision 1.0 to Revision 1.1
Changed “Si533x configuration” to “Any Rate
Clock Generator” throughout.
Changed “Si5338 Programmer” to “MultiSynth
Clock Programmer” throughout.
Updated Table 1, “Programs,” on page 7.
Updated Figures 3, 4, and 8.
Revision 1.1 to Revision 1.2
Changed “Any Rate Clock Generator” to
“ClockBuilder Desktop” throughout.
Changed “MultiSynth Clock Programmer” to
“ClockBuilder Desktop” throughout.
Updated Figure 3 on page 6.
Removed “Uninstaller Option” figure.
Updated Figure 8 on page 9.
Revision 1.2 to Revision 1.3
Added "9. Bill of Materials" on page 13.
Revision 1.3 to Revision 1.4
Added "6.1. Evaluating LVPECL Output Clocks"
on page 5.
Added references to the Si5335.

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