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Welcome to the LVDS / M-LVDS Transceivers E2E page!

Listed below are a variety of resources to assist with the implementation of Low Voltage Differential Signaling, also know as LVDS!

LVDS / M-LVDS Basics:

• How far and how fast can you operate LVDS drivers and receivers?
• How to terminate LVDS connections
• What performance can LVDS achieve with different cabling?
• How to interface between an LVDS driver and a sub-LVDS receiver
• How to Use a 3.3-V LVDS Buffer as a Low-Voltage LVDS Driver
• How to Support 1.8-V Signals Using a 3.3-V LVDS and a Level-Shifter
• What is failsafe biasing? How do I setup failsafe biasing for LVDS?
• How do I estimate LVDS power consumption?
• How can I reduce jitter in LVDS?

M-LVDS:

• What is M-LVDS? What are the design guidelines?
• How far and how fast can you operate M-LVDS transceivers?
  • Similar but older article: M-LVDS Signaling Rate Versus Distance

Additional resources:

• How to use LVDS to improve EMC in Motor Drives
• How do I support low voltage I/O signals into an FPGA, Professor, or ASIC with LVDS?
• How to use LVDS as a high-speed comparator
• How to convert HDMI/DVI to LVDS/OLDI
• Applications of LVDS in Ultrasound Scanners
• Applications of LVDS with LEDs
• How old of a date code is too old? Do ICs expire?

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Welcome to the RS-485 / RS-422 Transceivers E2E page!

Listed below are a variety of resources to assist with the implementation of RS-485 and RS-422!

Note that many RS-485 resources also apply to RS-422

RS-485 / RS-422 Basics:

• RS-485 Video Series
• RS-422 and RS-485 Standards Overview and System Configurations
• The RS-485 Design Guide
• Mitigating UART receiver glitches while switching modes

Frequently Asked Questions (FAQ):

• Why are termination resistors necessary? How do I terminate an RS-485 system?
• Is 54 Ohm termination recommended? What is the difference between 120 Ohm and 54 Ohm?
• What is external fail-safe? Why is fail-safe helpful?
• How old of a date code is too old? Do ICs expire?
• Are 3.3V and 5V RS-485 transceivers compatible? 
• Can galvanic isolation be used in RS-485 with a transformer?
• What is the difference between RS-422 and RS-485?
• How to calculate power consumption for RS-485?
• What are some recommended RS-485 transceivers?

IEC ESD, EFT, and Surge Information:

• How do I protect RS-485 from IEC ESD, EFT, and Surge?
• What devices does TI have with integrated surge protection?
• High EMC Immunity RS-485 Reference Design
• What are some recommend devices for IEC ESD protection in RS-485?
• What is an EFT? Part 1
• What is an EFT? Part 2
• What are the IEC 61000 4-2, 4-4, and 4-5 standards?
• What are the differences between Human Body Model (HBM) and IEC 61000 4-2? 

Special Functions of Select RS-485 devices:

• What is Auto-direction? Why is it useful?
• Flexible RS-485: Simplified Multi-System Design
• Multiprotocol Transceivers with THVD44xx
• Receiver Equalization for extending RS-485 distance and data rate

Power Line Communication Using Powerbus (OOK modulated RS-485):

• THVD80x0 Design Guide
• Low Voltage AC Design Guide with THVD80x0
• High Voltage or Low Bus Impedance Design Guide with THVD80x0
  • High Voltage or Low Impedance Reference Design with THVD80x0
• Classical RS-485 vs Powerbus
• Star Networks with THVD80x0

Part Number: LMH1297

Tool/software:

Hi,

When performing diagnostic evaluations of the LMH1297 retimer customers often want to adjust input cable EQ from the IO side. In these cases we recommend disabling the EQ adaptation and performing the following register sequence to manually adjust the cable EQ:

After writing the cable EQ value in ConfigIO register 0x24, read the updated value in 0x25 to ensure that the device's cable EQ value has changed.

Best regards,

Nick 

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Welcome to the CAN Transceivers E2E page!

Listed below are a variety of resources to assist with the implementation of the Controller Area Network, aka CAN!

Frequently Asked Questions (FAQs):

• Can 3.3V and 5V CAN transceivers operate on the same bus together?

• My MCU uses 3.3V as the logic supply, do I need a 3.3V CAN transceiver?

• What is CAN SIC (Signal Improvement Capability)? How does this improve my network?

• What resources are available for programming with CAN controllers?

• What is the function of the SPLIT pin on a CAN transceiver?

• How can the power consumption of a CAN transceiver in active operation be calculated?

• What are the different types of CAN implementations available in C2000 devices?

• What are the CAN ESD protection recommendations?

• What is the common mode voltage for CAN?

• What is the difference between standard and split termination?

• How do I find TI quality, reliability, and material reports?

• When do I need to Isolate CAN? How do I use CAN isolated devices?

• What power rating is needed for the CAN termination resistor?

• Is it possible to use CAT5 Ethernet cables for CAN? 

TI Guides, Reports, and more:

• CAN Video Series

• Overview of 3.3V CAN Transceivers

• Common Mode Chokes in CAN Networks: Source of Unexpected Transients

• Introduction to the Controller Area Network (CAN)

• Protecting Automotive Can Bus Systems from ESD Overvoltage Events

• CAN transceiver EMC and other compliance reports

  • Note: this is an internal resource only. For assistance with documentation, reach out to TI customer service, TI FAE, or TI sales representative.

• Semiconductor and IC Package Thermal Metrics

Welcome to the Interface Transceivers E2E page!

Here you will find a variety of resources that support our long list of devices (750+ and counting!)

Select an interface below to find a collection of FAQs, application notes, videos, and more:

Part Number: DS320PR810

Tool/software:

How do I check to make sure my PCIe signals are AC-coupled correctly?

Part Number: DP83TC812S-Q1

Tool/software:

Hello,

Here is a summary of available information about RGMII Shift and Align mode for our DP83TC81x devices:

• A minimum of 1ns setup and 1ns hold time must be maintained at the input of the receiver. 
• The delay can be added by PCB traces, by the PHY or by the MAC
• Either way, it is based on the RGMII input timing specifications and must be maintained.
• RGMII shift mode means there is an added delay. RGMII align mode means there is no added delay.
• 
• TX Delay
• 
• TX + RX delay
• 
• CLK Shift registers
• 

• The maximum programmable delay by our PHYs is 5 ns and the default is 2.5 ns.

Part Number: LMH1239

Tool/software:

Hello SDI engineers and LMH enthusiasts,

Figure 1 - 3:5 for SDI

In this E2E FAQ, I will be discussing GND plane layout best practices for SDI designs. In cable driver designs, see figure 1, SDI data transitions between 50 ohms differential and 75 ohm single ended characteristic impedances as the means of transport. 

Figure 2 - LMH1297 layout

Figure 2 illustrates the way TI adjusts the PCB layout to content with this change in characteristic impedance change. The green section shows the GND reference at Layer 3 of the board for the 75 ohm single ended signals. The increase in distance between the traces and the reference plane increases the characteristic impedance on the trace. 

All current must flow in a closed loop and return to its source. The goal of using a reference plane is to reduce emissions like crosstalk. The current will return to its source somehow, and it is in the designers best interest to ensure that the flow is predictable.

Best regards,

Nick

Part Number: TDP142

Tool/software:

Hi Experts,

What does 'Linear range' refer to on re-drivers like TDP142, TDP1204, TDP2004,...?

The device I received is marked as 'A5' but that is not listed as an option in the datasheet.