Silicon Laboratories Si5350/51-B20QFN-EVB User manual

Rev. 0.3 7/15 Copyright © 2015 by Silicon Laboratories Si535x-B20QFN-EVB
Si535x-B20QFN-EVB
Si5350/51 20-QFN EVALUATION BOARD USER’S GUIDE
Description
The Si535x-B20QFN-EVB is used for evaluating the
Si5350/51 any-frequency, 0.0025–200 MHz CMOS
clock generator + VCXO.
Features
Fully-powered from a single USB port
Onboard 27 MHz crystal for asynchronous operation
SMA and test point hook for interfacing to an
external clock reference
Jumper-selectable VDD and VDDOx allows device
to operate at 1.8 (VDDO only), 2.5, or 3.3 V
Voltage supply jumpers provide easy access for use
with external supplies
Functional Block Diagram
Jumper Selectable Vreg
1.8 V (VDDO only) / 2.5 V / 3.3 V
CLK0
CLK1
VDDO0
VReg
VReg
VReg
Vreg*
CLK2
CLK3
VDDO1
CLK4
CLK5
VDDO2
CLK6
CLK7
VDDO3
Si5350/51
I2C
Vreg*
CLKIN
XTAL
I2C Bus
VDD
MCU
USB
Connector
Status
LEDs
Reset
Switch
VC

Si535x-B20QFN-EVB
2 Rev. 0.3
1. Functional Block Diagram
Figures 1 and 2 highlight the main features of the EVB. The onboard MCU is responsible for programming the
Si535x timing IC, measuring the device's current consumption reported in the ClockBuilder™ Desktop, managing
power, and controlling status LEDs. VDD and VDDO jumpers allow the option of choosing between 1.8 (VDDO
only), 2.5, and 3.3 V or powering the device with external supplies (see Section “2. Jumpers” for details). I2C
jumpers allow the Si535x to be disconnected from the I2C bus, allowing external control from another I2C master.
The Si5350 device on this board is a hybrid of the Si5350/51 A, B, and C variants. It can run in stand-alone
asynchronous mode (Si5350/51A) using the onboard 27 MHz XTAL (Y1), or it can be synchronized to an external
clock using the CLKIN SMA connector or test points (Si5350/51C). It can also accept a VC input when in VCXO
(Si5350/51B) mode.
Note: EVBs labelled "REV 1.1" or "REV 1.2" are populated with rev A devices.
Figure 1. EVB Features (Front)

Si535x-B20QFN-EVB
Rev. 0.3 3
Figure 2. EVB Features (Back)

Si535x-B20QFN-EVB
4 Rev. 0.3
2. Jumpers
The following jumpers are available on the evaluation board:
VDD—Connects the Si5350/51 pin to the VDD voltage regulator (normally installed).
VDD VOLT_SEL—Allows user to select a VDD voltage of 2.5 V or 3.3 V (default 3.3 V).
VDDOA—Connects the Si5350/51 pin to the VDDOA voltage regulator (normally installed).
VDDOA VOLT_SEL—Allows user to select a VDDOA voltage of 1.8 (jumper removed), 2.5, or 3.3 V
(default).
VDDOB—Connects the Si5350/51 pin to the VDDOB voltage regulator (normally installed).
VDDOB VOLT_SEL—Allows user to select a VDDOB voltage of 1.8 (jumper removed), 2.5, or 3.3 V
(default).
VDDOC—Connects the Si5350/51 pin to the VDDOC voltage regulator (normally installed).
VDDOC VOLT_SEL—Allows user to select a VDDOC voltage of 1.8 (jumper removed), 2.5, or 3.3 V
(default).
VDDOD—Connects the Si5350/51 pin to the VDDOD voltage regulator (normally installed).
VDDOD VOLT_SEL—Allows user to select a VDDOD voltage of 1.8 (jumper removed), 2.5, or 3.3 V
(default).
SCL—Connects the Si5350/51 SCL pin to the I2C bus from the MCU. Removing the jumper breaks the
connection to the MCU and allows the user to feed in an external I2C signal to the device.
SDA—Connects the Si5350/51 SDA pin to the I2C bus from the MCU. Removing the jumper breaks the
connection to the MCU and allows the user to feed in an external I2C signal to the device.
EXT POWER—Allows user to select between 5 V USB supply and 5 V external supply on J17. See
Figure 1 for jumper locations.
3. Status LEDs
There are three status LEDs on the evaluation board:
RDY (Green)—Indicates that the EVB is operating normally. This LED should always be on.
BUSY (Green)—Indicates that the on-board MCU is communicating with the device and/or the USB host.
INTR (Red)—Indicates device or EVB fault condition (also on when DUT hasn't been programmed).
4. Clock Inputs
The EVB can operate in asynchronous mode using the onboard 27 MHz crystal, synchronous mode using an
external CMOS clock source, or both modes. An SMA connector and test points are provided to interface an
external clock source to CLKIN. Additionally, in the Si5350/51B mode, VC input can be applied to either the VC test
point or SMA connection.
5. Clock Outputs
Outputs can be measured using either SMA cables attached directly to an oscilloscope (recommended) or with
high impedance probes at the output clock test loops (TP53-TP60).
Clock voltage levels can be 1.8, 2.5, or 3.3 V depending on the VDDOx VOLT_SEL jumper selection.

Si535x-B20QFN-EVB
Rev. 0.3 5
6. Software Guide
The evaluation kit software toolset can be downloaded from www.silabs.com/Si5351-EVB. The toolset consists of
the following two applications:
ClockBuilder Desktop—Used to set up and evaluate the part and to save custom register map files.
Register Programmer—Used to program individual registers on the evaluation board DUT.
6.1. 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.
3. Leave the jumpers as installed from the factory, and launch the software by clicking on Start  Programs
 Silicon Laboratories  ClockBuilder Desktop. Click on one of the shortcuts in the group.
6.2. ClockBuilder Desktop Software Installation
The following sections describe how to install and use the software. There is a readme.txt file with the installation
files as well as a software user guide installed with the software.
6.2.1. System Requirements
Microsoft Windows® 2000, XP, Vista, 7
USB 2.0
3 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.
6.2.2. 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 web site:
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 but can run under other versions. Contact your system
administrator for more details.
6.2.3. 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.
6.2.4. ClockBuilder Desktop Software Uninstall Instructions
Close all the programs and help files before running the uninstaller to ensure complete removal of the software. To
uninstall the software, use the Add and Remove Programs utility in the Control Panel or click Start  Programs 
Silicon Laboratories  ClockBuilder Desktop  Uninstaller
Note: The driver software must be uninstalled separately.

Si535x-B20QFN-EVB
6 Rev. 0.3
7. Si535x-B20QFN-EVB Schematics
Place Y1 as close to pins U1.1 and U1.2 as possible. Remove ground plane from underneath the crystal.
Place R24/C13 as close to pin U1.3 as possible.
Place R109/C69 as close to U1.6 as possible.
CLKin must be 50-Ohm stripline.
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Figure 3. Si5350/51 Main

Si535x-B20QFN-EVB
Rev. 0.3 7
I2C INTERFACE
STATUS LEDs
Place D1 and D5 close to Programming Socket (U7). Place D2, D3, and D4 near USB connector.
BOARD CONFIGURATION
Place C26 and C27 as close as possible to pins U5.16 and U5.17 respectively.
Set P2.6 to High-Z for VDD_PROG=3.3V, O-D output low for VDD_PROG=4.0V.
MCU
Place C23 as close to pin U5.41 as possible.
2.7V to 5.5V0.9V to 5.5V
MCU PROGRAMMING
ADC MUX0 ADC MUX1
USB
EXTERNAL 5V0
+2.5V Ref
Address is 1001100
Address is 1001101
USB_D+
SDA_MCU
USB_D-
USB_D+
EN_I2C_5V
EN_I2C_5V
SEL_5350_PROG
2V50_REF
SCL_MCU
1V25_REF
BRD_CFG0 BRD_CFG3 BRD_CFG2
P4_PRG_DRV P3_PRG_DRV P0_PRG_DRV
BRD_CFG1
SDA_MCU
5V0_USB
SDA_5350_PRG SCL_5350_PRG
2V50_REF SCL_MCU SEL_5350_PROG
1V25_REF
USB_D-
5V0_USB
3V3
3V3
3V3
5V0 5V0
5V0
5V0
3V3
5V0
VDD_PRG
3V3
3V3 3V3
5V0 5V0
5V0
3V3
3V3
3V3
5V0
VDD_pin
VDDOB_pin
VDDOC_pin
VDDOD_pin
VDDOA_pin
VDD
VDDOB
VDDOC
VDDOD
VDDOA
5V0
3V3
nEN_VDD 4 nEN_PROG_VOLT 4 nEN_VDDO0 4 nEN_VDD_PRG 4 nEN_VDDO1 4
SCL_5V
SDA_5V
nEN_VDDO2 4 nEN_VDDO3 4
SDA_5350_DUT 2
SCL_5350_DUT 2
SCL_5V SDA_5V
SCL_5V SDA_5V
5350_INTR2
+
C28 10uF
R551K
D7
MMBD3004S-7-F
R59 0 NI
C26
0.1uF
TP8 GPIO_P2.7
R47 220
R49 1K
C18
0.1uF
ADG728
U7
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
TP9 MCU_ADC
R51 0
R43 220
S1
SW PUSHBUTTON
C31
0.1uF
C33 0.1uF
J11
HEADER 2x2
1
13 3
22 44
R67 412
R50 1K
+
C34 10uF
U3
ADG736BRMZ
D1
10
IN1
1
S1A 2
GND 3
S2A 4
IN2
5
S2B 7
VDD
8S1B 9
D2
6
D1
RED
PROG FAIL
R52 0 NI
D5
GREEN
RDY
R41 0
U4
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
+
C29 10uF
C17
0.1uF
R53 0 NI
J19
5X2 Shrouded Header
1
122
3
344
5
566
7
788
9
910 10
C25 1uF
R61 1.02K
R36 1K
C22
0.1uF
D4
GREEN
BUSY
R54 0
C30 1uF
D6
MMBD3004S-7-F
J18 USB Type B
+V 1
D- 2
D+ 3
GND 4
SH
5SH
6
TP5 SCL RED
C35 0.1uF
R42 1K
R60 1.02K
C20
0.1uF
C24 4.7uF
JP1
HEADER 1x3
TP4 SDA RED
C23 0.1uF
R44 1K
R37 1K
R48 1.02K
D3
RED
INTR
J17
CONN TRBLK 2
1 2
TP7 GPIO_P1.7
R57 0
C21
0.1uF
R45 1.02K
ADG728
U6
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
R40 2K
R38 1K
R56 0 NI
2.5V
U5
VOUT 1
GND
2
VIN
3
C32
0.1uF
R46 220
C19 4.7uF
D2
GREEN
PROG PASS
R58 0
R39 2K
C27 0.1uF
PCA9517D
U2
VCCA
1
SCLA
2
SDAA
3
GND
4
VCCB 8
SCLB 7
EN 5
SDAB 6
Figure 4. MCU and Programming Socket

Si535x-B20QFN-EVB
8 Rev. 0.3
VDD
2.5V
3.3V
Power Supplies
VDDOA VDDOB
VDDOC VDDOD
VDD_PRG
3V3
2.5V
3.3V
2.5V
3.3V
2.5V
3.3V
2.5V
3.3V
1.8V (JP3=N/C)
1.8V (JP4=N/C)
1.8V (JP2=N/C)
1.8V (JP6=N/C)
1.8V (JP5=N/C)
VDD_pin VDD
5V0
VDDOB_pin VDDOB
VDDOC_pin VDDOC
5V0
VDDOD_pin VDDOD
5V0 5V0
5V0
3V3
VDD_PRG
5V0
5V0
VDDOA_pin VDDOA
nEN_VDDO13
nEN_VDDO23
nEN_VDDO03
nEN_VDDO33
nEN_VDD_PRG3
nEN_VDD3
nEN_PROG_VOLT 3
C52 0.1uF
R90 20.0 J24
JUMPER
1 2
R72 20.0
R74 20.0
JP6 HEADER 1x3
R84 5.90K
R106 10K
R103
9.53K
+
C55
10uF
J22
JUMPER
1 2
+
C65
10uF
R86 4.42K
+
C46
10uF
R107 2.55K
C62 0.1uF
C51 0.1uF
JP5 HEADER 1x3
R85
9.53K
R91 20.0
JP2 HEADER 1x3
R73 20.0
C56 4.7uF
C54 4.7uF
R98 6.98K
U12
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
J21
JUMPER
1 2
C45 4.7uF
+
C57
10uF
+
C43
10uF
+
C53
10uF
R94
100K
U13
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
C50 0.1uF
U9
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
C42 4.7uF
JP3 HEADER 1x3
R92 10K
C64 0.01uF
C58 0.1uF
+
C41
10uF
C59 0.01uF
U14
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
R95 10K
C60 0.01uF
C48 4.7uF
U11
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
R76 10K
JP4 HEADER 1x3
C44 0.01uF
R99 5.90K
R79
100K
R93
100K
R81 5.90K
R101 4.42K
R75 10K
C66 0.1uF
C49 0.01uF
R83 4.42K
C61 0.01uF
R100
9.53K
R105 2.55K
U10
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
R97 10K
C63 0.1uF
R87 5.90K
R82
9.53K
R80
100K
C47 0.01uF
J23
JUMPER
1 2
R102 5.90K
U15
TPS76201
IN
1
GND
2
EN
3
FB 4
OUT 5
R89 4.42K
J20
JUMPER
1 2
R77
100K
R78 10K
R104 4.42K
R88
9.53K
R96
100K
Figure 5. Power Supplies

Si535x-B20QFN-EVB
Rev. 0.3 9
8. Bill of Materials
Table 1. Si535x Bill of Materials
Item Qty Reference Value Manufacturer Manufacturer Part Number
1 5 C2,C5,C7,C8,C9 0.47 µF Venkel C0402X5R100-474K
2 1 C13 1nF Venkel C0603X7R101-102K
312
C17,C18,C20,C21,C22,C23,
C26,C27,C31,C32,C33,C35 0.1 µF Venkel C0402X7R100-104K
47
C19,C24,C42,C45,C48,C54,
C56 4.7 µF Venkel C1206X7R100-475M
5 2 C25,C30 1 µF Venkel C1206X7R250-105K
610
C28,C29,C34,C41,C43,C46,
C53,C55,C57,C65 10 µF Kemet B45196H5106M309
77
C44,C47,C49,C59,C60,C61,
C64 0.01 µF Venkel C0603X7R160-103M
88
C50,C51,C52,C58,C62,C63,
C66,C69 0.1 µF Venkel C0603X7R100-104K
98
C70,C71,C72,C73,C74,C75,
C76,C77 1 pF MuRata GRM1555C1H1R2CA01D
10 2 D1,D3 RED Panasonic LN1271RAL
11 3 D2,D4,D5 GREEN Panasonic LN1371G
12 2 D6,D7 MMBD3004S-7-F Diodes Inc. MMBD3004S-7-F
13 6 JP1,JP2,JP3,JP4,JP5,JP6 HEADER 1x3 Samtec TSW-103-07-T-S
14 10 J5,J25,J26,J27,J28,J29,J30,
J32,J33,J34 SMA Johnson Com-
ponents 142-0701-801
15 1 J11 HEADER 2x2 Samtec TSW-102-07-T-D
16 1 J17 CONN TRBLK 2 Phoenix Con-
tact 1729018
17 1 J18 USB Type B Tyco 292304-1
18 1 J19 5X2 Shrouded
Header Tyco 5103309-1
19 5 J20,J21,J22,J23,J24 JUMPER Samtec TSW-102-07-T-S
20 15
R3,R4,R5,R8,R9,R23,R24,R51
,R52,R53,R54,R56,R57,R58,
R59
0 Venkel CR0603-16W-000
21 1 R7 4.99K Venkel CR0402-16W-4991F
22 4 R12,R13,R39,R40 2K Venkel CR0603-10W-2001F
23 1 R26 100K Venkel CR0603-10W-104J

Si535x-B20QFN-EVB
10 Rev. 0.3
24 8 R36,R37,R38,R42,R44,R49,
R50,R55 1K Venkel CR0402-16W-102J
25 9 R41,R110,R111,R112,R113,
R114,R115,R116,R117 0 Venkel CR0402-16W-000
26 3 R43,R46,R47 220 Venkel CR0402-16W-221J
27 4 R45,R48,R60,R61 1.02K Venkel TFCR0402-16W-E-1021B
28 1 R67 412 Venkel TFCR0402-16W-E-4120B
29 5 R72,R73,R74,R90,R91 20 Venkel CR2512-1W-20R0D
30 7 R75,R76,R78,R92,R95,R97,
R106 10K Venkel CR0603-16W-1002F
31 6 R77,R79,R80,R93,R94,R96 100K Venkel CR0603-10W-1003F
32 5 R81,R84,R87,R99,R102 5.90K Venkel CR0603-16W-5901F
33 5 R82,R85,R88,R100,R103 9.53K Venkel CR0603-16W-9531F
34 5 R83,R86,R89,R101,R104 4.42K Venkel CR0603-16W-4421F
35 1 R98 6.98K Venkel CR0603-16W-6981F
36 2 R105,R107 2.55K Venkel CR0603-16W-2551F
37 1 R109 49.9 Venkel CR0603-16W-49R9F
38 1 S1 SW PUSHBUTTON Mountain
Switch 101-0161-EV
39 4 TP3,TP20,TP61,TP62 BLACK Kobiconn 151-203-RC
40 10
TP4,TP5,TP53,TP54,TP55,
TP56,TP57,TP58,TP59,
TP60
RED Kobiconn 151-207-RC
41 4 TP7,TP8,TP9,TP52 WHITE Kobiconn 151-201-RC
42 4 TP38,TP39,TP48,TP49 Turret Mill-Max 2551-2-00-44-00-00-07-0
43 1 U1 Si5350X-B-GM Silicon Labs Si5350X-B-GM
44 1 U2 PCA9517D NXP PCA9517D
45 1 U3 ADG736BRMZ Analog Devices ADG736BRMZ
46 1 U4 C8051F340 SiLabs C8051F340-GQ
47 1 U5 2.5V Analog Devices AD1582BRT
48 2 U6,U7 ADG728 Analog Devices ADG728BRUZ
49 7 U9,U10,U11,U12,U13,U14,U15 TPS76201 TI TPS76201DBV
50 1 Y1 27MHz TXC 7M-27.000MEEQ-T
Table 1. Si535x Bill of Materials (Continued)
Item Qty Reference Value Manufacturer Manufacturer Part Number

Si535x-B20QFN-EVB
Rev. 0.3 11
9. Approved Crystals
The crystals listed in Table 2 have been approved for use with the Si5350/51 family of devices. Note that this
device has on-chip load capacitors that can be configured for 0, 6, 8, and 10 pF. For crystals with any other rated
load capacitance, external capacitors may be required to achieve the best absolute accuracy.
Table 2. Approved Crystals
Mfr Part Number Freq Load
Capacitance
Initial
Accuracy
Stability
over
Temp
Web Site
Kyocera
CX3225SB25000D0FLJZ1 25 MHz
8 pF ±10 ppm ±15 ppm http://global.kyocera.com/
index.html
CX3225SB27000D0FLJZ1 27 MHz
Sunny
SP10115J6-25.000MHz 25 MHz
10 pF ±15 ppm ±30 ppm http://www.sunny-usa.com/
SP10115J6-27.000MHz 27 MHz
NDK
NX3225GA-25.000M-STD-CRG-2 25 MHz
8 pF ±20 ppm ±30 ppm http://www.ndk.com/en/
NX3225GA-27.000M-STD-CRG-2 27 MHz
Epson FA-238 25.0000MB-K 25 MHz 10 pF ±50 ppm ±30 ppm http://www.eea.epson.com/
TXC 7M-27.000MEEQ 27 MHz 10 pF ±10 ppm ±10 ppm http://www.txc.com.tw

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