Lvpecl driver termination sheet

An unused complementary output must be either terminated into 50. The application diagrams in the following figures allow the zl40212 to accept lvpecl, lvds, cml, hcsl and singleended inputs. Lowjitter lvpecl fanout clock buffers with up to 10 lvpecl outputs from anyformat input and wide frequency range from dc up to 1250 mhz. However, by utilizing custom ac or dccoupled termination schemes, such an interface can be effectively implemented.

The output rise and fall times are measured with both the q and q outputs terminated into 50. It receives a lvpecl compatible electrical input, and converts it into a modulated current driving the led. The capacitance c1 is used to create ac ground at the termination voltage. For differential lvecl operation, these devices operate from a 2. All measurements are made with outputs terminated into 50. Ultraprecision differential 800mv lvpecl line driver, tape and reel. Lvpecllvdscml to lvttllvcmos translator the mc100ept21 is a differential lvpecllvdscml to lvttllvcmos translator.

Ecl uses an overdriven bjt differential amplifier with singleended input and limited emitter current to avoid the saturated fully on region of operation and its slow turnoff behavior. The lvpecl driver output voltage device specification should always be considered, and ibis or spice simulation should be performed to determine the optimal. Sit5021 1220 mhz high performance differential vc tcxo rev. In electronics, emittercoupled logic ecl is a highspeed integrated circuit bipolar transistor logic family. Any of these outputs that are not connected to a scope or other instrument should be terminated with a 50. Lvpecl driver vdd 100 ohm 100 ohm 100 ohm 100 ohm 100 nf 100 nf figure 5 lvpecl input ac coupled termination zl40214 data sheet 7 microsemi corporation downloaded from. Lvpecl accoupled interface with termination and biasing at the receiver. The zl40201 provides an internal input termination network for dc and ac coupled inputs. The input isreproduced at two differential outputs. The differentialinput can be adapted to accept singleended inputs byapplying an. Lvds and lvpecl specifications and resistor termination information are available in the fpga dc and switching characteristics section of the data sheet.

Welcome back to the get connected blog series here on analog wire. Output terminations for sit910290029103 lvpecl, lvds, cml, and hcsl differential driversoscillators are enhanced from 16 ma to 22 ma, thus increasing the signal swing for a 25. Lvpecl driver vterm vdd 2v r1 r2 50 ohm clkx vdd 3. The max9312 features an onchip vbb reference output. As in previous cases, the accoupled capacitors may be used between the termination network and the receiver where needed. Since they are on the far end of a cable system, the driver must have balancing 330ohm resistors to complete the output driver and allow it to function when the cable or far end pcb is unplugged. For differential ecl and lvecl operation, this device operates from a 3. Lvpecl, lvds crystal oscillator data sheet vectrons vcj5 crystal oscillator is a quartz stabilized, diff erential output oscillator, operating off either 2. Dccoupling between differential lvpecl, lvds, hstl, and cml. Please consult with the vendor of the driver component to confirm the driver termination requirements.

This application note provides termination examples for hiperclocks 3. Proper termination is required to ensure proper function of the device. Data sheet zl40234 low skew, low additive jitter, 4 output. The si5332028 family of lvpecl fanout buffers is ideal for clockdata distribution and redundant clocking applications.

For more information on these standards please, logic signal in the device. Dccoupling between differential lvpecl, lvds, hstl, and. Output terminations for sit910290029103 lvpecl, lvds. Lvpecl, lvds crystal oscillator data sheet vectrons vcc6 crystal oscillator is a quartz stabilized, di. The pecl output impedance is low, typically on the order of 45. Pecl and lvpecl are differentialsignaling systems and are mainly used in highspeed and clockdistribution circuits. The max9321max9321a are lowskew differential receiver drivers designed for clock and data distribu tion. The external power consumption is simply the power consumed in the external termination. Mc100ept21 lvpecllvdscml to lvttllvcmos translator. However, no responsibility is assumed by analog devices. Converts singleended input signals into differential signals for driving long lines ideal for receiving differential signal from long lines 1 ppsirigb line driver converts ghz sine wave signals into differential lvpecl signals an essential lab tool for working with ghz lvpecl circuits features. The tables below summarize the various ac and dccoupling options supported by the device. Ultra low jitter performance, fundamental or 3rd ot crystal design. Lvpecl output produces an 800 mv swing through the 50.

If the driver is from another vendor, use their termination recommendation. Adclk946bcpz datasheet912 pages ad six lvpecl outputs. 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. Lvpecl0 driver output structurethe lvpecl0 driver output structure is. V tt, using the prl550lpq4x four channel lvpecl terminator, connected to a 50. Ultra low jitter performance, fundamental or 3rd ot crystal design output frequencies to 275. Proper termination is required to ensure proper function of the device and signal integrity.

Io interface includes onboard termination fully assembled and tested can be reconfigured for dccoupled operation related documentation sy89850u, precision lowpower lvpecl line driver receiver with internal termination data sheet. Lvpecl driver receiver r 3 r 2 r 2 2r t r 1 r 1 r 3 v cc v cc a b figure 4 a stepup resistor network interfaces lvds drivers to lvpecl receivers. Sy58601u, related documentation cml line driverreceiver with internal termination data sheet sy58601u. This application note includes standard direct termination and ac coupled termination. The split termination with a capacitor is useful in eliminating commonmode noise manifested as differential skew between the true and complementary signals.

The external vco can have an operating voltage of up to 5. Lvpecl to lvpecl the ytermination in figure 3 is another alternative to lvpecl termination where. Output terminations for sit910290029107 lvpecl, lvds. As the current is steered between two legs of an emittercoupled pair, ecl is sometimes called. The max9321b features ultralow propagation delay 172ps and parttopart skew 20ps with 24ma maximum supply current, making this device.

Scaa059cmarch 2003revised october 2007 accoupling between differential lvpecl, lvds, hstl, and cml 3. Output terminations for sit910290029107 lvpecl, lvds, cml. These terminations are equivalent to terminating 50. However, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other. The differential input can be adapted to accept a singleended input by connecting the onchip vbb supply to an input as a reference voltage. Lvpecl terminators lvpecl terminators technical data sheet rohs compliant parts available ee ee packaging information suffix tr7 tr tape width 24 mm 24mm carrier pitch 8 mm 8 mm reel diameter 7 inch inch partsreel 1,000 4,000 part number coding 7 inch reel, add tr7 to part number, example rt2250b7tr7. In this post, we are going to take a step back and examine how to convert between lvpecl, vml, cml, lvds, and sublvds interfaces.

The zl40234 is a pin configurable low additive jitter, low power 3 x 4 lvpeclhcsllvds fanout buffer. Precision lowpower lvpecl line driverreceiver with. Accoupling between differential lvpecl, lvds, hstl, and. The max9321b lowskew differential receiver driver is designed for clock and data distribution. Lowvoltage positive emittercoupled logic lvpecl is a poweroptimized version of pecl, using a positive 3. Lvpecl and lvds, common electrical characteristics supply voltage vdd 2. For pricing delivery, and ordering information please contact maximdallas direct. Turn on the power and verify the current is termination for a pecl output is 50. Lvds lvpecl driver receiver r 3 r 2 r 2 r 1 r 1 r 3 v cc v cc b figure 5 a typical architecture shows how lvdslvpecl drivers and cmltmds receivers communicate with each other. The swing of lvpecl is the largest one of all differential signal types, as shown in table 1. Termination lvpecl an828 introduction lvpecl is an established high frequency differential signaling standard that requires external passive components for proper operation. Accoupling between differential lvpecl, lvds, hstl, and cml. Interfacing between lvpecl, vml, cml, lvds, and sublvds levels welcome back to the get connected blog series here on analog wire. The drive circuit power is dissipated within the device and is a function of the output currents and the voltage drop across the driver circuit.

General description the max9321max9321a are lowskew differential receiverdrivers designed for clock and data distribution. Two inputs can accept signal in differential lvpecl, sstl, lvds, hstl, cml or single ended lvpecl or lvcmos format and the third input can accept a single ended signal or it can be used to build a crystal oscillator by. There are many different termination schemes for the lvpecl drivers. Split supply termination lvpecl although rarely used in end applications, split power supply termination is often used to take advantage of the internal 50 ohms termination of an oscilloscope or a frequency counter. The vbb output is provided on most lvpecl receivers. As a result, designers are forced to seek alternative routes. Precision lowpower lvpecl line driverreceiver with internal. For dc coupled logic, these external components bias both the lvpecl driver into conduction and terminate the associated differential transmission line.

Output terminations for sit910290029107 lvpecl, lvds, cml, and hcsl differential drivers. The input interfaces suggested here are examples only. Zl40215ldg1 16 pin qfn trays zl40215ldf1 16 pin qfn tape and reel matte tin. For example, suppose a mc100ep16 operating differentially in lvpecl mode vcc 3. The logic power is best described as the switch and bias power required by the ic. Interfacing between lvpecl, vml, cml and lvds levels. Since the lvpecl offset voltage is vdd 2v, shifting vdd down by 1. Rz, the termination resistors, are actually considered part of the lvpecl driver itself. The differential input can be adapted to accept a singleended input by connecting the onchip v bb supply to an input as a reference voltage. This demand for higher speed has shifted the industry from singleended. B document feedback information furnished by analog devices is believed to be accurate and reliable.