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Evaluation Board/Kit Important Notice

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY 
and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have
electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.

TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or
services described herein.

Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or
safety programs, please contact the TI application engineer or visit

www.ti.com/esh

.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.

FCC Warning

This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES
ONLY 
and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio
frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
be required to correct this interference.

EVM Warnings and Restrictions

It is important to operate this EVM within the input voltage range of and the output voltage range of .

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions
concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than . The EVM is designed to operate properly
with certain components above as long as the input and output ranges are maintained. These components include but are not limited to
linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the
EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation, please be
aware that these devices may be very warm to the touch.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2012, Texas Instruments Incorporated

Summary of Contents for SN65HVD257

Page 1: ...d Filtering Configuration 10 3 4 Using Customer Installable IO Options for Current Limiting Pull up or down Noise Filtering 11 3 5 Using customer installable IO options for 3 3V IO 11 4 SN65HVD257 EVM...

Page 2: ...odes normal mode and silent mode selected on pin 8 The FAULT pin indicates TXD dominant time out RXD dominant time out thermal shut down and under voltage faults Figure 1 SN65HVD257 Basic Block Diagra...

Page 3: ...combine the RXD outputs of both branches During dominant bits low were the branches do not match the XOR the circuit outputs a logic high A small RC filter on the output eliminates false outputs due t...

Page 4: ...such as GND VCC TXD RXD CANH CANL S FAULT The EVM supports many options for CAN bus configuration It is pre configured with two 120 resistors that may be connected on the bus via jumpers a single resi...

Page 5: ...5 GND 1 TP8 RXD 1 TP1 GND 1 C17 DNI U1 SN65HVD257 TXD 1 GND 2 Vcc 3 RXD 4 FLT 5 CANL 6 CANH 7 S 8 C13 1uF R10 DNI R17 0 U5 SN65HVD257 TXD 1 GND 2 Vcc 3 RXD 4 FLT 5 CANL 6 CANH 7 S 8 R19 330 C1 DNI TP7...

Page 6: ...60 load for CAN transceiver parametric measurement JMP10 4 pin header Connection for access to transceiver 2 CAN bus output CANH2 CANL2 GND GND Connect 120 CAN termination to the bus Used in combinat...

Page 7: ...XDprime RXD Receive Data 7 GND GND 8 VCC Pin 3 of Transceiver VCC 9 S2 Pin 5 of Transceiver 2 Used for Mode control 10 FLT2 Pin 8 of Transceiver 2 Indicates fault with transceiver 2 11 GND GND 12 FLT3...

Page 8: ...MP1 and TP10 This output indicates a RXD DTO TXD DTO Thermal Shut Down or undervoltage fault with transceiver 1 3 1 7 FLT 2 FAULT pin 5 transceiver 2 JMP1 TP23 Pin 5 of transceiver 2 is the fault outp...

Page 9: ...y the split capacitance is in the range of 4 7nF to 100nF Keep in mind that this is the common mode filter frequency not a differential filter that will impact the differential CAN signal directly Tab...

Page 10: ...us filter environment Filter caps may be used in combination with L1 CM choke To add extra protection for system level transients and ESD protection use the D1 and D2 Transient Protection Transient ES...

Page 11: ...ode pin input from JMP1 or PU or S U1 Input R1 JMP2 R2 NA C1 JMP2 PD to S U1 R27 S Mode pin input from JMP1 or PU or S U2 Input R25 JMP2 R26 NA C21 JMP2 PD to S U2 FAULT3 is the combined RXD output fr...

Page 12: ...r 1 JMP3 may be used to route these signals to an external host processor or test system Make sure that the MODE JMP2 jumper settings are not conflicting with signals to JMP3 JMP2 transceiver 1 config...

Page 13: ...nsceiver 2 Ensure JMP7 and JMP8 are not configured to conflict if TP19 is used as the input connection 4 2 4 FLT2 Output JMP7 TP23 Pin 5 of transceiver 2 is the fault output of the transceiver This ou...

Page 14: ...2 JMP5 JMP10 Header 1x4 HDR_THVT_1X4_100 ANY ACT45B or B82789 series 17 2 L1 L2 DNI TDK EPCOS CM choke 18 4 R1 R16 R25 R40 4 7k 805 ANY R2 R3 R8 R15 R17 R20 R21 R26 19 11 0 805 ANY R27 R32 R39 20 4 R3...

Page 15: ...o handling the product This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI a...

Page 16: ...egulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided...

Page 17: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments SN65HVD257EVM...

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