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3 Schematic

Figure 3-1

 illustrates the EVM schematic.

SCL1

3

SDA1

4

VREF1

2

EN

8

GND

1

SCL2

6

SDA2

5

VREF2

7

TCA39306DTMR

U3

EN

8

SCL1

3

SDA1

4

VREF1

2

GND

1

SCL2

6

SDA2

5

VREF2

7

TCA39306DDFR

U2

Vref1

Vref1

Vref2

SCL1

SCL1
SDA1

SDA1

EN

SCL2
SDA2

GND

GND

EN

Vref2

SCL1

3

SDA1

4

VREF1

2

EN

8

GND

1

SCL2

6

SDA2

5

VREF2

7

TCA39306DCUR

U1

Vref1

SCL1
SDA1

GND

SCL2
SDA2

EN

Vcc1

Adjustable pull up resistors

10k

R13

4.7k

R10

820

R9

Vcc1

Adjustable pull up resistors

TP3

TP5

GND

1

J3

1

J7

Adjustable pull up resistors

10k

R14

4.7k

R15

820

R16

Vcc2

Adjustable pull up resistors

TP4

TP6

1

J4

1

J8

50V
8.2pF

C8

50V
16pF

C7

50V
33pF

C6

50V
68pF

C5

50V
130pF

C4

50V
270pF

C3

GND

1

1

2

SW3A
78B06ST

2

1

1

SW3B
78B06ST

3

1

0

SW3C
78B06ST

4

9

SW3D
78B06ST

5

8

SW3E
78B06ST

6

7

SW3F
78B06ST

GND

50V
8.2pF

C14

50V
16pF

C13

50V
33pF

C12

50V
68pF

C11

50V
130pF

C10

50V
270pF

C9

GND

1

1

2

SW4A
78B06ST

2

1

1

SW4B
78B06ST

3

1

0

SW4C
78B06ST

4

9

SW4D
78B06ST

5

8

SW4E
78B06ST

6

7

SW4F
78B06ST

GND

TP2

1

J2

Vcc2

1

J1

TP1

Vcc1

Connectors for power supplies

Adjustable load capacitance

Adjustable load capacitance

Adjustable load capacitance

Adjustable load capacitance

Additional GND connectors

1

2

J11

GND

100nF
50V

C2

Disable Option

200k

R24

Vcc2

Vref2

100nF
50V

C1

GND

1

2

J15

1

2

J14

0

R25

SCL1

SDA1

SCL2

SDA2

SCL1_Load

SDA1_Load

SDA1_Load

SCL1_Load

SCL2_Load

SDA2_Load

SCL2_Load

SDA2_Load

0

R8

0

R18

0

R7

0

R21

Vref1

1

1

2

SW1A
78B06ST

2

1

1

SW1B
78B06ST

3

1

0

SW1C
78B06ST

4

9

SW1D
78B06ST

5

8

SW1E
78B06ST

6

7

SW1F
78B06ST

1

1

2

SW2A
78B06ST

2

1

1

SW2B
78B06ST

3

1

0

SW2C
78B06ST

4

9

SW2D
78B06ST

5

8

SW2E
78B06ST

6

7

SW2F
78B06ST

0

R20

SCL2
SDA2

0

R23

0

R19

0

R22

0 ohm resistors on DDF package is used to reduce st ubbing on the PCB traces when set as DNP

0

R17

0

R11

4.7k

R4

820

R3

0

R12

50V
8.2pF

C15

50V
16pF

C16

50V
33pF

C17

50V
68pF

C18

50V
130pF

C19

50V
270pF

C20

10k

R5

4.7k

R2

820

R1

50V
8.2pF

C21

50V
16pF

C22

50V
33pF

C23

50V
68pF

C24

50V
130pF

C25

50V
270pF

C26

Vcc1

10k

R6

Vcc1

1

2

3

4

J6

1

2

3

4

J9

Vcc2

Vcc2

1

2

3

4

J10

1

2

3

4

J5

Vcc2

J13

J12

Figure 3-1. TCA39306EVM Schematic

Schematic

www.ti.com

6

TCA39306 EVM User's Guide

SCPU045 – JUNE 2021

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Copyright © 2021 Texas Instruments Incorporated

Summary of Contents for TCA39306

Page 1: ...1 Introduction 2 2 Concept 2 2 1 EVM Features 2 2 2 Adjustable pull up resistors 2 2 3 Load Capacitance Selector 3 2 4 DUT locations 4 3 Schematic 6 4 Bill of Material 7 5 Layout 9 6 Revision History...

Page 2: ...istors which allows for the user to select from a 4 7 k and 820 resistor The board itself has a 10 k pull up resistor on the I2C bus when no resistors are selected from the adjustable pull up bank Whe...

Page 3: ...acitance due to parasitics from the PCB line traces and ICs on the board For SDA and SCL pins of a device assume 10 pF maximum per device on the I2C line One important aspect to remember is the TCA393...

Page 4: ...would prefer to use the DDF package then U1 would need to be removed and U2 can then be populated In additional to populating U2 the resistors R11 R12 R17 R19 R22 R20 and R23 all must be populated wi...

Page 5: ...ed to be populated U1 must be unpopulated to reveal the location of U3 Figure 2 6 shows the location of U3 Figure 2 6 U3 Location www ti com Concept SCPU045 JUNE 2021 Submit Document Feedback TCA39306...

Page 6: ...ectors for power supplies Adjustable load capacitance Adjustable load capacitance Adjustable load capacitance Adjustable load capacitance Additional GND connectors 1 2 J11 GND 100nF 50V C2 Disable Opt...

Page 7: ...Standoff 1902C Keystone J1 J2 J3 J4 J7 J8 6 Header 1x1 Tin TH Header 1x1 PEC01SAAN Sullins Connector Solutions J5 J6 J9 J10 4 Header 100mil 2x2 Gold TH 2x2 Header TSW 102 07 G D Samtec J11 J14 J15 3...

Page 8: ...Blue TH Blue Multipurpose Testpoint 5127 Keystone U1 1 Dual Bidirectional I2C Bus and SMBus Voltage Level Translator PSOP8 TCA39306DCUR Texas Instruments FID1 FID2 FID3 0 Fiducial mark There is nothi...

Page 9: ...06EVM Bottom Layout 6 Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version DATE REVISION NOTES June 2021 Initial Release www ti com Layout SCPU...

Page 10: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 11: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Page 12: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 13: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Page 14: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 15: ...are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and...

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