Questions tagged [transceiver]

For questions about devices that are both transmitters and receivers.

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Kenwood transceiver output to amplifier buzzes when connected

My fire department uses a Kenwood TK690-H as a base radio. The system was used to (poorly) power 3 in ceiling speakers throughout the station. Recently, I rewired the paging system in the station with ...
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1 answer
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What chip is this? I suspect it's a CAN transceiver

I couldn't find this part number after googling.. both chips appear to say: NXP A42/3C EVG000 (or EV0000) nD921 but it's hard to read. Here's a pic below. I'm guessing they are the NXP TJA1042, ...
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What conditions can cause a PCB fuse to fail and act as a resistor?

Context: Tx circuit that shoots 24V pulses into a transformer to get 240V out of it. The purpose is to drive a piezoelectric transducer. The circuit itself has a fuse protecting it at the entrance (...
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1 vote
1 answer
54 views

CAN bus fault protection

Question: Is there a way to implement with discrete components the 70V CAN bus fault protection found in some transceivers, such as TCAN1051H-Q1 ? Background: We are using the CAN transceiver ...
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Ethernet 100 BASE-TX Question

I'm using this Ethernet transceiver PHY to study the working of the RGMII interface. I just want to understand 2 things. 1. What would be the output and input differential voltage levels on the pins 2,...
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What is GTP short for?

Xilinx uses so called "GTP Transceiver". What is "GTP" short for?
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1 answer
67 views

voltage translation 1.8V and 3.3V using passive/active components

I have a chip that operates on 1.8V Vcc and has a digital interface I2C that also obviously outputs 1.8V signals and receives 1.8V signals. The datasheet says anything above 2V on VCC or digital input ...
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2 answers
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Horrible buzzing on custom car bluetooth

I've got an older vehicle that is wired for a CD changer. I'm using a few components to trick it into playing Bluetooth. Components MCP2025 Transceiver for car's LIN bus Regulates voltage (>12V ...
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4 votes
1 answer
140 views

Troubleshooting CANbus 2B comms on ESP32-WROVER-based custom PCB (ABOVE WARN, ERR PASSIVE, BUS ERROR)

I am building an ESP32 WROVER-based custom PCB which includes CANbus 2B communications. This PCB is a copycat of my breadboard project. Though on my breadboard version, the CANbus works like. charm, ...
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111 views

CAN bus termination resistor

I'm trying to design a CAN device where the user can select which device is the beginning/end device and activate the 120 ohm resistor accordingly. I've seen some examples using a switch, but I'm ...
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1 answer
119 views

Intra Pair Length Mismatch Tolerance For 12.5Gbps signals

I'm making a high-speed transceiver design and want some direction regarding layout of trace length from P to N. The speeds will be up to 12.5Gbps. I have been informed by a equalizer manufacturer ...
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  • 119
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RFM69HCW Digital IO connection setup

I'm working to setup an RFM69HCW transceiver with an ARM microcontroller. I've read over the datasheet for the RFM69HCW and I see that DIO0 is the interrupt signal, so I've broken that one out, but ...
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3 answers
262 views

RS-485 communication with slave microcontrollers driving addressable LEDs?

I am trying to figure out how to achieve the master-slave configuration shown below. The aim is to individually address an array of 150mA LEDs, driven by the IS31FL3265A PWM driver. For this specific ...
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1 vote
2 answers
149 views

Maxim MAX3485ESA+T vs SP3485EN-L/TR

I have a question about the MAX3485ESA+T RS485 Transceiver. I ordered a PCB with a MAX3485ESA+T and the project doesn't work. The previous design was with a SP3485EN-L/TR and it worked well, but I had ...
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1 vote
0 answers
85 views

How to create an RS485-compatible line driver with an adjustable slew rate?

I need to make an RS485 compatible line driver, capable of 12Mbit/s with fast slew rate, but with the capability to reduce the slew rate to about 50ns rise/fall time when operating at lower bitrates. ...
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1 vote
1 answer
24 views

Ethernet Transceiver Modem block scheme: 50:50 device in block scheme

This is a system architecture of the Optical Ethernet Transceiver Modem (OETM) which allows a bidirectional transmission of optical signals and electrical signals (Ethernet). Given an optical input ...
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-1 votes
1 answer
54 views

Invert signal from optical transceiver

I want to achieve electrically HIGH state in this receiver (Vo tag), when there is HIGH state in the fiber. What I get now is 5 V when there is no pulse in the fiber and 0.48 V when there is (RXVCC=5 ...
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1 answer
27 views

force output on a MAX3232 RS-232 transceiver

I need to probe the output RX (DOUT1/2) nets (connected to one MCU's UART) of a MAX3232 RS232 transceiver, for this I'll use the PCB test points, but I'd also like to "force" logic levels on ...
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2 votes
1 answer
179 views

Do P/N matter for Diff Pair Clock Inputs to FPGA?

I have noticed on a schematic for an FMC card that the differential pairs of a differential LVDS oscillator do not match the corresponding FPGA transceiver reference clock pins. I.e. the P/N are ...
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SPI Line Switching for Redundant Design

I am in the process of designing a full-duplex transceiver board. I am using an ATmega328pb uC and a CC1125 radio. This is for a CubeSat project, so in the interest of redundancy, I'm I would like ...
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1 answer
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AX5043 RF XCVR, problem making the automatic frequency control work in GMSK

I am working with the AX5043 RF transceiver from OnSemi. I am using GMSK, and I am unable to make the automatic frequency control (AFC) work properly. I am using a bitrate of 2400 bps. To be sure to ...
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1 answer
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ENABLE and T/R pins on MAX7032 Tranciever

Last month I started working with electronics a bit. With no previous knowledge and I'm getting into PCB design for many different applications. That being said please correct me if I misinterpret or ...
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3 votes
2 answers
280 views

What is the simplest 100km RF communication link there is?

I am looking for a technology for sending sporadic bytes over RF hundreds of kilometers away - assume line of sight. What should I look into to do that? What frequency? What modulation? Perhaps what ...
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CAN Transceiver circuit problem with TJA1042T/3

I am a novice designer who recently started designing circuits. Using the STM32f407VGT MCU operating at 3.3V, using the CAN1TX(PB9) CAN1RX(PB8) pins, the circuit was configured by referring to NXP's ...
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0 votes
1 answer
143 views

SN75176 with 3.3V

Can I connect the SN75176 RS485 transceiver with a 3.3V microcontroller? The datasheet says that it must be powered with 5V and all inputs / outputs are TTL, but I'm not sure since the minimum high ...
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0 votes
1 answer
102 views

Data Oversampling Transceivers

I am trying to find more information about data oversampling for transceivers when grabbing/sending a lower speed signal. I am looking into building a fully compliant HDMI 1.4b fpga core, and have ...
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70 views

SMPS mode power supply for 868 MHz operation in S2LP

I am trying to design a PCB for 868 MHz operations using S2LP, referring to the schematic from steval fki868v2. I have attached the same here. I would like to use SMPS mode and BALUN for the operation....
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0 votes
1 answer
118 views

Transceiver IC for radar

I'm trying to build a radar that functions in the ISM bands (433 MHz, 915 MHz, 2.4 GHz and 5.8 GHz). I'm trying to look for RF transceiver ICs that operate in these bands. Most of the ICs I'm finding ...
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0 votes
1 answer
110 views

Can transceiver replace SPI, I2C and other "normal" methods for high speed data transfer between FPGAs? If so, how? [closed]

SPI, I2C and UART are some well known serial methods for data transfer between devices on the same PCB. However, they all have a data rate bottleneck which is significantly lower than Multi Gigabit ...
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1 vote
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49 views

Fiber optic transceiver for lower speeds

I am trying to figure out if a QSFP-DD transceiver can break out 8x 10G lanes if I make/use a 1:8 fiber optic breakout cable. It seems like most Transceivers are rated for one speed only, so if I get ...
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0 votes
1 answer
42 views

Phy transceivers query

Are phy transceivers like Ethernet phy, Wlan phy and USB phy transceivers digital or analog in nature? I referred to datasheets but it just shows transmitter and receiver as a block diagram, hence ...
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0 votes
0 answers
37 views

Lora sx1278 implementation by Arduino Uno

I'm implementing a Lora network, with two SX1278 modules and Arduino Uno. Lora is based on three classes. A , B and C, The question is : for change For example A to B, what should exactly change in ...
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1 vote
1 answer
111 views

Is my use of the L9637 iso9141 single-wire transceiver a robust design?

Eventually, I want to tap into the K-line of my Kawasaki Ninja with an (ISO 9141) OBD reader, using an ESP32 WROVER and a L9637 single-wire transceiver. To get there, I'm at the stage of confirming ...
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0 votes
1 answer
326 views

CAN bus expander circuit

I am trying to design a CAN bus expander. In this case I could implement star topology of multiple buses in parallel. It would avoid having problems with reflections and delay. For this purpose I ...
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1 answer
61 views

Using EEPROM for transceiver data communication in Tx and Rx mode?

I am planning to use EEPROM (ST-M95640-DF) in between Transceiver IC (ST-S2LP) and the MCU (STM32L152RE). I would put program commands in a read-only section of the EEPROM to be accessed easily. Now ...
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0 votes
2 answers
192 views

Designing mil-std-1553 transceiver [closed]

I need to design a mil-std-1553 analog front end transceiver to already designed digital 1553 ip for my ms thesis. So I need to convert digital 3.3V to analog specs level and receive and convert to ...
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0 votes
1 answer
100 views

433 MHz Transceiver - understanding OOK demodulator parameter 'OokFixedThreshold'

I would appreciate some help to understand a parameter for this device https://www.semtech.com/products/wireless-rf/fsk-transceivers/sx1231h. I'm far from an expert at RF matters and this question has ...
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0 votes
1 answer
2k views

Difference between PCS and PMA loopback in transceivers

Can someone let me know the difference between PCS and PMA loopback used in XILINX transceiver IBERT testing.
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1 answer
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Isolated dc dc converter

What is the best way (low cost) to obtain a 5v isolated output from 24v batt? The 5v isolated is only for power transceivers so not to much current output is required
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0 votes
2 answers
136 views

Gigabit transceiver with MHz reference clock

I've some experience with Xilinx FPGA generating 10Gb/s over SMA loopback with on-off keying modulation (what scope shows) to perform BER test but the documentation shows it uses a reference clock in ...
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0 votes
0 answers
235 views

Normal Mode of CAN Controller in STM32L476 Nucleo Board is Not Working

I am using STM32L476RG Nucleo board which contains only one CAN controller(bx_CAN1) and SN65HVD233 as a CAN Transceiver. I could able to test the CAN controller by using "LOOPBACK Mode". ...
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0 votes
2 answers
160 views

SN65HVD232: Will it work if VCC = 5V?

Datasheet - SN65HVD232 Full part no - SN65HVD232D My schematic - Hi all, there is a problem in my PCB where 5V track is connected to VCC pin instead of 3.3V. Actual input should be 3.3V as per ...
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0 votes
1 answer
84 views

LIN transceiver instability problem

I'm using the MCP2021A for my project. In this component, there is a voltage regulator but I have no use for it. They usually power microcontroller like the PIC18F2455 but I'm using a Raspberry Pi ...
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2 votes
0 answers
307 views

How is a CAN Transceiver's common mode voltage range extended?

The CAN Standard states a max. common mode voltage of -2 V to +7 V. There are transceivers however, that allow for e.g. +-25 V common mode voltage range. How is that acheived? I imagine (I do not ...
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1 vote
2 answers
74 views

What does a transceiver like MAX 483 do, especially when it is connected to RS-485?

I cannot understand the principle that the transceiver uses. Why do we need to connect it to RS-485, and how is the data transmitted? I mean how does it transmit the data and why? It is like I cannot ...
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0 votes
1 answer
1k views

Conversion SSI to SPI

I want to interface an encoder based on the SSI interface with a microcontroller and only an SPI interface is available (I can't use other interfaces than SPI). As far as I see, SSI has a lot in ...
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0 votes
2 answers
196 views

CAN transceiver interface with two CAN BUSES

I would like to use the NXP TJA1046/TJA1048 dual CAN transceiver to connect to two CAN BUS. I would like to mux the TX1/TX2 and RX1/RX2 and connect them to single TX/RX interface on the MCU. In order ...
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1 vote
1 answer
223 views

How to design Power Line communication with line transceivers?

I am trying to design a communication system that will send data signals over a 400V DC voltage line by using line transceivers. I attached the LTspice schematics below. The transformer is for ...
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1 answer
66 views

withstand voltage of RS-485 Transceiver

i am working with a half duplex RS-485 Transceiver ic SP3485EN with 10Mbps Data Rate datasheet :https://www.maxlinear.com/ds/sp3485.pdf i actually want the maximum working voltage (Viom) of design ...
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2 votes
0 answers
911 views

MCP2551 with STM32 MCU

im learning about the CAN protocol, and bought the transceiver module MCP2551 like this: I made the driver for CAN controller first in loopback mode for debug, im sending the numbers 1,2,3 and 4 with ...
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