Lvpecl to lvds xilinx download

Interface lvpecl to lvds cypress developer community. Accoupling between differential lvpecl, lvds, hstl, and. Im trying to understand how the below circuit allows interfacing lvds levels with lvpecl levels. Virtexii pro, virtex4,virtex5 can i put lvds or lvpecl i.

Analog devices portfolio of low voltage differential signaling lvds drivers and receivers offers designers robust, high speed signaling singleended to differential solutions for pointtopoint applications. In many cases there is a need to connect lvds drivers to banks powered at 1. Hi, you want to look for a pair of pins that are part of differential input that are close together on the wing header. Single lvdsanythingtolvpecl translator maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. Lvdsanything to lvpecllvds dual translator designed for signal rates up to 2ghz. The differential input buffers are powered by vccaux and are not vccodependent. A comparison of cml and lvds for highspeed serial links introduction lvds lowvoltage differential signaling is a widely used lowpower, lowvoltage standard for implementing parallel and lowrate serial differential links in data communication applications. Lvpecllvdscml to lvttllvcmos translator the mc100ept21 is a differential lvpecllvdscml to lvttllvcmos translator.

Our selection of products contains the first lvds transceivers to meet 8 kv iec esd performance standards important for robust, interboard. Xilinx answer 40191, interfacing different types of lvds in 7 series. The differential output conforms to the ansi tiaeia644 lvds standard. One channel is lvdsanythingtolvpecl translator and the other channel is lvdsanythingtolvds translator. A comparison of cml and lvds for highspeed serial links. The ics859s0424i has four selectable differential pclkx, npclkx clock inputs.

This module perfectly fits on our xmf5 development board. This is facilitated by the low channeltochannel and parttopart skew of the adn4650. The pclkx, npclkx input pairs can accept lvpecl, lvds or cml levels. Lvds and lvpecl specifications and resistor termination information are available in the fpga dc and switching characteristics section of the data sheet. If i try to instantiate the lvds buffers, fpga express will insert io buffers, causing errors when the design is run through the implementation tools. In this post, we are going to take a step back and examine how to convert between lvpecl, vml, cml, lvds, and sublvds interfaces.

Using lvds io introduction low voltage differential signaling lvds is a very popular and powerful highspeed interface in many system applications. The programming bits can also selectively enable an output driver to simultaneously. Xilinx answer 58162, design advisory for artix7 fpga wirebond package devices selectio prohibits pin list when gtp transceivers are. It will be displayed anonymously and potential suppliers will come back to you directly. A high speed, low power consumption lvds interface for cmos. The max9376 is a fully differential, highspeed, lvdsanythingtolvpecllvds dual translator designed for signal rates up to 2ghz. This is the first time i am sunig the lvpecllvds simulations. The data input from the offchip lvpecl lvds circuit arrives on line 156 only for single ended data. Fpga io can differential inputs, such as lvds or lvpecl. Xilinx solution 8187 contains complete details about using the special virtexe io buffers. Serial lvds interface considerations for wideband data converter applications.

Mc100ept21 lvpecllvdscml to lvttllvcmos translator. Introduction to lvds, pecl, and cml maxim integrated. Programmable inputoutput circuit for fpga for use in ttl, gtl, gtlp, lvpecl and lvds circuits. Sitime offers an extensive portfolio of highperformance differential oscillators for networking, server, storage, and telecom applications. A programmable inputoutput structure comprised of three input circuits and one output circuit coupled to the pin of an fpga with the input circuits and output circuits being selectively enabled by programming bits so that input signals may be accepted from ttl, gtl, gtlp, lvpecl or lvds type external circuits. Lvpecl, lvds crystal oscillator data sheet previous. Driving lvpecl, lvds, cml and sstl logic with idts universal lowpower hcsl outputs 4 revision b 120715 an891 driving lvds lvds needs 350400mvpp singleended swing at each input pin and a common mode voltage of 1.

A programmable inputoutput structure comprised of three input circuits and one output circuit coupled to the pin of an fpga with the input circuits and output circuits being selectively enabled by. Accoupling between differential lvpecl, lvds, hstl, and cml kal mustafachris sterzik high performance analog abstract this report provides a quick reference of accoupling techniques for interfacing between different logic levels. Spartan6 and lvpecl i need to interface a pecl comparator i. Your options are to 1 check if your device already produces lvds compatbile signal 2 use a buffer which can accept lvpecl and drive lvds ala sy58605u. Driving lvpecl, lvds, cml and sstl logic an891 with idts. The max9376 is a fully differential, highspeed, lvds anythingto lvpecl lvds dual translator designed for signal rates up to 2ghz. Accoupling between differential lvpecl, lvds, hstl, and cml. A high speed, low power consumption lvds interface for. Xilinx serial transceivers can the lvds standard be. Lowvoltage positive emittercoupled logic lvpecl is a poweroptimized version of pecl, using a positive 3.

Please note that in that case there is limitations about maximum speed etc. For more detailed information, please refer to the xilinx virtexe data sheet, available at. L low voltage swing signals 300mv 400mv provide a higher operating frequency, reduced transient switching noise lower emi, and lower power dissipation. Xilinx answer 16830, interfacing lvds25, lvds33 and lvpecl. I have seen lvds and pecl been described as 3v3, as the driver. Range mhz input voltage vdc stability options product features ccld023 ccld024. Welcome back to the get connected blog series here on analog wire. For instance the system clock for the memory controller is. The max9376 is a fully differential, highspeed, lvds anything to lvpecl lvds dual translator designed for signal rates up to 2ghz. One channel is lvds anythingto lvpecl translator and the other channel is lvds anything tolvds translator. Positive emittercoupled logic, also called pseudoecl, pecl is a further development of ecl using a positive 5 v supply instead of a negative 5. The jesd204ajesd204b industry standard for serial interfaces was developed to address the problem of interconnecting the newest wideband data converters with other system ics in an efficient and cost saving manner. Dccoupling between differential lvpecl, lvds, hstl, and cml.

Accouplingbetween differential lvpecl, lvds, hstl, and cml. Dec 15, 2015 in general xilinx fpga uses the cml io standard used for gtx transceiver pins. Dec, 2006 my understanding of lvds inputs is that you have a differential receiver that switches at the signal crossing point within the specified timing as long as your common mode voltage is within the databook spec. Us6218858b1 programmable inputoutput circuit for fpga for. One channel is lvds anything to lvpecl translator and the other channel is lvds anything to lvds translator. Cdclvd 110 sn 65lvds 100 sn 65lvds 122 sn 65lvds 104 lvds driver lvds receiver 100 w z 50o w z 50o w 3. Lvds drivers and receivers provide a system design with the following benefits. Lvds by ieee scalable coherent interface standard sci is a high speed, low power interface that is a. Virtexii fpga provides two options for powering lvds drivers.

Lvpecl, lvds crystal oscillator data sheet previous vectron model vcc6 vectrons vc706 crystal oscillator is a quartz stabilized, diff erential output oscillator, operating off either 2. Interfacing between lvpecl, vml, cml, lvds, and sublvds levels welcome back to the get connected blog series here on analog wire. Sy89532l x lvpecl lvpecl lvpecl sy89533l x lvpecl lvds lvpecl sy89534l x lvpecl lvpecl lvpecl sy89535l x lvpecl lvds lvpecl features integrated synthesizer plus fanout buffers, clock dividers, and translator in a single 64pin package accepts any reference input between 14mhz to 160mhz singleended or differential. In the previous get connected blog post, serdes xaui to sfi design, we took an indepth look at using the tlk10232 in a xaui to sfi protocol converter design. Power consumption of lvpecl and lvds introduction singleended emittercoupled logic ecl has been in existence for over 30 years and is a proven highspeed technology. Virtexii ios are designed to comply with the ieee electrical specifications for lvds to make system and board design easier. But it is possible to connect lvds pins to gtx transceiver pins by using some external ac dc coupling circuit. Designing with the lvpecl iostandard is the same as designing with lvds. Output terminations for sit910290029103 lvpecl, lvds, cml. Galvanic isolation of external interfaces is required in harsh environments for safety, functionality, or improved noise immunity.

A source termination technique and a special current comparator were used to increase the maximum speed and maintain low power consumption at the same time. Level translation with termination methods interconnection between logic families this document will cover the io families based on pecl lvpecl, lvds, hstl and lvttl uses. Dec 19, 2008 the general family of lvpecl swings from 3. A high speed, low power consumption lvds interface for cpss implemented in 0.

Dccoupling between differential lvpecl, lvds, hstl, and. Electrical characteristics comparison of the differential logic families 5. Lvdss proven speed, low power, noise control, and cost advantages are popular in pointtopoint applications for telecommunications, data communications, and displays. Lvpecl, lvds crystal oscillator data sheet vectrons vcj5 crystal oscillator is a quartz stabilized, diff erential output oscillator, operating off either 2. The max9376s extremely low propagation delay and high speed make it ideal for various highspeed network routing and backplane applications. Ultra low jitter performance, fundamental or 3rd ot crystal design output frequencies to 250. Mar 11, 2016 lvds is very common and its a shame the board doesnt support it. Lvds to lvpecl in figure 11 is a combination of the more common 100. The inputs are biased with internal resistors such that the output is differential low when inputs are open. View forum posts private message view blog entries view articles member level 5.

This peripheral module is designed for use with fpga, cpld or microcontroller development boards. In your constraints file you do this this is on the papilio pro. This answer record discusses the supported standards for reference clocks of transceivers. In lvds interface, there is one pin going for the lvds driver, but in the xilinx architecture, there is two pin going into the interface, one is indicated with the p notation, and one is n which stands for positive and negatiive respectively.

The driver and the receiver were fully integrated into io cells. Xilinx answer 40191, compatibility between lvds powered at 1. Lvpecl, lvds crystal oscillator data sheet vectrons vc806 crystal oscillator is a quartz stabilized, di. Search within lvds refine by provider to get full access, please login here. To accomplish lvpecl to lvds interfacing the proposal scheme uses the thevenin equation to fix the static level of the lvds input. Can anyone explain how do we do the pin assigment for a single line data that needed to be converted into lvds signal, and how does the single line. Analogtodigital converter adc interfaces typically utilize source synchronous data transmission with lvds. Interfacing between lvpecl, vml, cml, and lvds levels 5 3. This includes analog front ends used in data acquisition modules for industrial measurement and control, as well as digital interfaces between processing nodes. Lvpecl of fers the advantage of high noise immunity over relatively long.

Ultra low jitter performance, fundamental or 3rd ot crystal design. Spartan3 does, v2pro does but i am not sure on v4 but probably yes. Can we just using the accoupled and dcbiased as attached. I was looking for any spicehspice test bench to see how to use these models as driver and receivers.

My guess is that it uses current mode logic cml but if anyone could clarify this. There are dozens of other level classes and even sub classes in these. Lvpecl, lvds crystal oscillator data sheet vectrons vcc6 crystal oscillator is a quartz stabilized, di. Lvds driver output structurelvds 1 is a highspeed digital interface suitable for many applications that require low. Programmable inputoutput circuit for fpga for use in ttl. The sit91xx and sit93xx families offer the low jitter, as well as power supply noise rejection psnr in the presence of common environmental hazards, such as shock. Lvds to lvpecl the sn65lvds101, in figure 10, can be used as an lvds to lvpecl converter. Interfacing between lvpecl, vml, cml and lvds levels. May 10, 2005 a partial help is that some of the newer xilinx families will support input lvds lvpecl on vccio 3. The actual specs vary across vendors because lvpecl is not based on an io standard. Lvpecl and lvds are commonly used standards used for reference clocks. Maxim reserves the right to change the circuitry and specifications without notice at any time. Us6218858b1 programmable inputoutput circuit for fpga. Table 173 lists the allowed attributes for the lvpecl io standard.

What are the consequences of leaving a differential input undriven. Ive already read ug381 and several messages in this forum, but since ive found some contradictory informations, i would like to make sure ive understood all correctly. The lvpecl differential output swing will surely go over the lvds input. Lvds driver lvpecl receiver vbb z 50o w z 50o w 50 w 50 w e. Lvds low voltage differential signaling technology also addresses the needs of current high performance applications. The current texas instruments serial gigabit solution device that has an integrated lvpecl driver is the tnete2201 device. This means that an lvds clock is transmitted in parallel with one or more data bit streams on other lvds channels. Gtpgtxgthgty generally supports refclks from lvdslvpecl oscillators as mentioned in the user guide. You can download the package fiels for your device from the below link. In general, the differential signal is fed into a resistor ladder that translates the higher voltages of lvpecl to that of the lower needsof lvds. Regarding io standard lvpecl standard is removed from 7 series fpgas. The outputs for this device can either be programmed to give lvpecl or lvds levels. Several interface modifications are presented with supporting ibis simulation results.

A partial help is that some of the newer xilinx families will support input lvds lvpecl on vccio 3. Ultrascale architecture selectio resources user guide xilinx. After the transmission line, the ac coupling caps remove the dc common mode of the driver so that voh 0. One other request i have is to provide for termination resistor pads on the board, close to the artix part. Virtex6 fpga gtx transceivers user guide ug366 see board design guidelines section states that both lvpecl and lvds standards are supported for transceiver reference clocks, but the virtex6 fpga gth transceivers user guide ug371 does not recommend lvds to be used for reference clocks because of minimum input signal amplitude reasons for. More recently, differential ecl has been introduced along with the variants of positive ecl pecl and lowvoltage pecl lvpecl. I havent used virtex4 yet, but at least in earlier xilinx parts the lvds input common mode range was broad enough to support lvpecl. If all or most of the ports in your design use special virtexe io standards, one option is to. The information disclosed to you hereunder the materials is provided solely for the selection and use of xilinx products. Users must instantiate the io buffer names in the hdl codes. Tiaeia lvds, tmds, rsds, lvpecl and others that create rules and specifications for io signaling.