Rev. 0.4 3/20 Copyright © 2020 by Silicon Laboratories Si535x-B20QFN-EVB

Si535x-B20QFN-EVB

Si5350/51 EVALUATION BOARD USER’S GUIDE

Description

The Si535x-B20QFN-EVB is used for evaluating theSi5350/51 any-frequency, 0.0025–200 MHz CMOSclock generator + VCXO.The pre-soldered 20-QFN device can be configuredusing ClockBuilder Pro to emulate all available Si5350/51 package options, including 10-MSOP, 16-QFN, and20-QFN.

Features

ClockBuilder Pro configurable, allowing quick frequency plan analysis

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 Vreg1.8 V (VDDO only) / 2.5 V / 3.3 V

CLK0

CLK1

VDDO0

VRegVRegVRegVreg*

CLK2

CLK3

VDDO1

CLK4

CLK5

VDDO2

CLK6

CLK7

VDDO3

Si5350/51

I2C

Vreg*

CLKIN

XTAL

I2C

Bus

VDD

MCUUSB

Connector

Status LEDs

Reset Switch

VC

Si535x-B20QFN-EVB

2 Rev. 0.4

1. Functional Block DiagramFigures 1 and 2 highlight the main features of the EVB. The onboard MCU is responsible for programming theSi535x timing IC, measuring the device's current consumption reported in the ClockBuilder™ Pro EVB GUI,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 I2Cmaster.The Si5350 device on this board is a hybrid of the Si5350/51 A, B, and C variants. It can be configured to emulatea 10-MSOP, 16-QFN, or 20-QFN device. It can run in stand-alone asynchronous mode (Si5350/51A) using theonboard 27 MHz XTAL (Y1), or it can be synchronized to an external clock using the CLKIN SMA connector or testpoints (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. 0.4 3

Figure 2. EVB Features (Back)

5V External Supply

USB MCU

Si535x-B20QFN-EVB

4 Rev. 0.4

2. JumpersThe 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 LEDsThere 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 InputsThe EVB can operate in asynchronous mode using the onboard 27 MHz crystal, synchronous mode using anexternal CMOS clock source, or both modes. An SMA connector and test points are provided to interface anexternal clock source to CLKIN. Additionally, in the Si5350/51B mode, VC input should be applied to either the VCtest point or SMA connection.

5. Clock OutputsOutputs can be measured using either SMA cables attached directly to a high-input impedance 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. 0.4 5

6. Software GuideThe Si535x-B20QFN-EVB is fully compatible with ClockBuilder Pro. This software can be used to program the pre-soldered hybrid Si5350/51 device to emulate any type of Si5350/51 part, including A/B/C variants, in 10-MSOP, 16-QFN, or 20-QFN packages.To program the device, just connect the Si535x-B20QFN-EVB to a computer running ClockBuilder Pro using theprovided USB Cable. With the ClockBuilder Pro software opened and the EVB connected, a "Si535x EVB" willshow up on the main ClockBuilder Pro Wizard page.

Figure 3. ClockBuilder Pro Wizard with the Si535x EVB ConnectedFrom this page, either open a default EVB plan, open an existing Si535x A/B/C ClockBuilder Pro project file usingthe Open Project button, or create a new Si535x A/B/C project file using the Create New Project button. Once aproject file is opened, it can be written to the EVB in the Design Dashboard. When a 10-MSOP or 16-QFN projectis written to the EVB, an additional GUI will pop-up to show which CLK outputs on the EVB apply to that packagetype.Once a configuration has been finalized, a project file can either be used to create a custom-orderable Si5350/51part number, or the register file can be exported for easy in system volatile programming.The ClockBuilder Pro EVB GUI can also be used to view or modify individual Si5351 registers as well as monitorthe device's power consumption.

Si535x-B20QFN-EVB

6 Rev. 0.4

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.

Figu

re4.

Si53

50/5

1 M

ain

Si535x-B20QFN-EVB

Rev. 0.4 7

I2C

INTE

RFAC

E

STAT

US L

EDs

Plac

e D1

and

D5

clos

e to

Pro

gram

ming

Soc

ket

(U7)

.Pl

ace

D2,

D3,

and

D4 n

ear

USB

conn

ecto

r.

BOAR

D CO

NFIG

URAT

ION

Plac

e C2

6 an

d C2

7 as

clo

se a

s po

ssib

le

to p

ins

U5.1

6 an

d U5

.17

resp

ecti

vely

.

Set

P2.6

to

High

-Z f

or V

DD_P

ROG=

3.3V

,O-

D ou

tput

low

for

VDD

_PRO

G=4.

0V.

MCU

Plac

e C2

3 as

clo

se t

o pi

n U5

.41

as p

ossi

ble.

2.7V

to

5.5V

0.9V

to

5.5V

MCU

PROG

RAMM

ING

ADC

MUX0

ADC

MUX1

USB

EXTE

RNAL

5V0

+2.5

V Re

f

Address is 1001100

Address is 1001101

USB

_D+

SDA_

MC

U

USB

_D-

USB

_D+

EN_I

2C_5

V

EN_I

2C_5

V

SEL_

5350

_PR

OG

2V50

_REF

SCL_

MC

U

1V25

_REF

BRD

_CFG

0

BRD

_CFG

3BR

D_C

FG2

P4_P

RG

_DR

VP3

_PR

G_D

RV

P0_P

RG

_DR

V

BRD

_CFG

1

SDA_

MC

U

5V0_

USB

SDA_

5350

_PR

G

SCL_

5350

_PR

G

2V50

_REF

SCL_

MC

U

SEL_

5350

_PR

OG

1V25

_REF

USB

_D-

5V0_

USB

3V3

3V3

3V3

5V0

5V0

5V0

5V0

3V3

5V0

VDD

_PR

G

3V3

3V3

3V3

5V0

5V0

5V0

3V3

3V3

3V3

5V0

VDD

_pin

VDD

OB_

pin

VDD

OC

_pin

VDD

OD

_pin

VDD

OA_

pin

VDD

VDD

OB

VDD

OC

VDD

OD

VDD

OA

5V0

3V3

nEN

_VD

D4

nEN

_PR

OG

_VO

LT4

nEN

_VD

DO

04

nEN

_VD

D_P

RG

4

nEN

_VD

DO

14

SCL_

5V

SDA_

5V

nEN

_VD

DO

24

nEN

_VD

DO

34

SDA_

5350

_DU

T2

SCL_

5350

_DU

T2

SCL_

5V

SDA_

5V

SCL_

5V

SDA_

5V

5350

_IN

TR2

+C

2810

uF

R55

1K

D7 M

MBD

3004

S-7-

F

R59

0 NI

C26 0.1u

F

TP8

GPI

O_P

2.7

R47

220

R49

1K

C18

0.1u

F

ADG

728U7

SDA

3

RES

ETB

2

S14

S25

S36

S47

D8

A016

S89

S710

S611

S512

VDD13 GND

14

SCL

1

A115

TP9

MC

U_A

DC

R51

0

R43

220

S1 SW P

USH

BUTT

ON

C31

0.1u

F

C33

0.1u

F

J11

HEA

DER

2x2

11

33

22

44

R67

412

R50

1K

+C34

10uF

U3

ADG

736B

RM

Z

D1

10

IN1

1S1

A2

GN

D3

S2A

4IN

25

S2B

7

VDD

8S1

B9

D2

6

D1

RED

PRO

G F

AIL

R52

0 NI

D5

GR

EEN

RD

Y

R41

0

U4

C80

51F3

40

VDD10

REGIN11 GND

7

VBUS12

D+

8

D-

9

P0.0

6P0

.15

P0.2

4P0

.33

P0.4

2P0

.51

P0.6

48P0

.747

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

/C2C

K13

C2D

14

+C

2910

uF

C17

0.1u

F

R53

0 NI

J19

5X2

Shro

uded

Hea

der

11

22

33

44

55

66

77

88

99

1010

C25

1uF

R61

1.02

K

R36

1K

C22 0.

1uF

D4

GR

EEN

BUSY

R54

0

C30

1uF

D6 M

MBD

3004

S-7-

F

J18

USB

Typ

e B +V

1

D-

2

D+

3

GN

D4

SH5SH6

TP5

SCL

RED

C35

0.1u

F

R42

1K

R60

1.02

K

C20

0.1u

F

C24

4.7u

F

JP1

HEA

DER

1x3

TP4

SDA

RED

C23

0.1u

F

R44

1K

R37

1K

R48

1.02

K

D3

RED

INTR

J17

CO

NN

TR

BLK

2

1 2

TP7

GPI

O_P

1.7

R57

0

C21

0.1u

F

R45

1.02

K

ADG

728U6

SDA

3

RES

ETB

2

S14

S25

S36

S47

D8

A016

S89

S710

S611

S512

VDD13 GND

14

SCL

1

A115

R40

2K

R38

1K

R56

0 NI

2.5V

U5

VOU

T1

GND2

VIN

3

C32

0.1u

F

R46

220

C19

4.7u

F

D2

GR

EEN

PRO

G P

ASS

R58

0

R39

2K

C27

0.1u

F

PCA9

517D

U2

VCC

A1

SCLA

2

SDAA

3

GN

D4

VCC

B8

SCLB

7

EN5

SDAB

6

Figu

re5.

MC

U a

nd P

rogr

amm

ing

Sock

et

Si535x-B20QFN-EVB

8 Rev. 0.4

VDD

2.5V

3.3V

Power

SuppliesVDDOA

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)

VD

D_p

inV

DD

5V0

VD

DO

B_p

inV

DD

OB

VD

DO

C_p

inV

DD

OC

5V0

VD

DO

D_p

inV

DD

OD

5V0

5V0

5V0

3V3

VD

D_P

RG

5V0

5V0

VD

DO

A_p

inV

DD

OA

nEN

_VD

DO

13

nEN

_VD

DO

23

nEN

_VD

DO

03

nEN

_VD

DO

33

nEN

_VD

D_P

RG

3

nEN

_VD

D3

nEN

_PR

OG

_VO

LT3

C52

0.1u

F

R90

20.0

J24

JUM

PE

R

12

R72

20.0

R74

20.0

JP6

HE

AD

ER

1x3

R84

5.90

K

R10

610

K

R10

39.

53K

+C55 10

uF

J22

JUM

PE

R

12

+C65 10

uF

R86

4.42

K

+C46 10

uF

R10

72.

55K

C62

0.1u

F

C51

0.1u

F

JP5

HE

AD

ER

1x3

R85 9.53

K

R91

20.0

JP2

HE

AD

ER

1x3

R73

20.0

C56

4.7u

FC

544.

7uF

R98

6.98

K

U12

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

J21

JUM

PE

R

12

C45

4.7u

F

+C57 10

uF

+C43 10

uF

+C53 10

uF

R94

100K

U13

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

C50

0.1u

F

U9

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

C42

4.7u

F

JP3

HE

AD

ER

1x3

R92

10K

C64

0.01

uF

C58

0.1u

F

+C41 10

uF

C59

0.01

uF

U14

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

R95

10K

C60

0.01

uF

C48

4.7u

F

U11

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

R76

10K

JP4

HE

AD

ER

1x3

C44

0.01

uF

R99

5.90

K

R79

100K

R93

100K

R81

5.90

K

R10

14.

42K

R75

10K

C66

0.1u

F

C49

0.01

uF

R83

4.42

K

C61

0.01

uF

R10

09.

53K

R10

52.

55K

U10

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

R97

10K

C63

0.1u

F

R87

5.90

K

R82 9.53

K

R80

100K

C47

0.01

uF

J23

JUM

PE

R

12

R10

25.

90K

U15

TPS

7620

1

IN1

GN

D2

EN

3

FB4

OU

T5

R89

4.42

K

J20

JUM

PE

R

12

R77

100K

R78

10K

R10

44.

42K

R88 9.53

K

R96

100K

Figu

re6.

Pow

er S

uppl

ies

Si535x-B20QFN-EVB

Rev. 0.4 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

3 12 C17,C18,C20,C21,C22,C23,C26,C27,C31,C32,C33,C35 0.1 µF Venkel C0402X7R100-104K

4 7 C19,C24,C42,C45,C48,C54,C56 4.7 µF Venkel C1206X7R100-475M

5 2 C25,C30 1 µF Venkel C1206X7R250-105K

6 10 C28,C29,C34,C41,C43,C46,C53,C55,C57,C65 10 µF Kemet B45196H5106M309

7 7 C44,C47,C49,C59,C60,C61,C64 0.01 µF Venkel C0603X7R160-103M

8 8 C50,C51,C52,C58,C62,C63,C66,C69 0.1 µF Venkel C0603X7R100-104K

9 8 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 15R3,R4,R5,R8,R9,R23,R24,R51,R52,R53,R54,R56,R57,R58,

R590 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. 0.4

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 10TP4,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

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DisclaimerSilicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes without further notice to the product information, specifications, and descriptions herein, and does not give warranties as to the accuracy or completeness of the included information. Without prior notification, Silicon Labs may update product firmware during the manufacturing process for security or reliability reasons. Such changes will not alter the specifications or the performance of the product. Silicon Labs shall have no liability for the consequences of use of the information supplied in this document. This document does not imply or expressly grant any license to design or fabricate any integrated circuits. The products are not designed or authorized to be used within any FDA Class III devices, applications for which FDA premarket approval is required, or Life Support Systems without the specific written consent of Silicon Labs. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death. Silicon Labs products are not designed or authorized for military applications. Silicon Labs products shall under no circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Silicon Labs disclaims all express and implied warranties and shall not be responsible or liable for any injuries or damages related to use of a Silicon Labs product in such unauthorized applications.

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