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SY56020R Evaluation Board

Low Voltage 1.2V/1.8/2.5V CML Differential

1:4 Fanout Buffer with Input Equalization

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

October 2008 M9999-100108-A

hbwhelp@micrel.com or (408) 955-1690

General Description

The SY56020R evaluation board is designed for

convenient set-up and quick evaluation. It allows the user

to evaluate the part over the full voltage-range of the part

without requiring any modification to the board.

The evaluation board standard configuration is AC-coupled

inputs with DC-coupled outputs for direct interface to a

50Ω-compatible oscilloscope. For applications that require

a DC-coupled configuration, step-by-step instructions for

modifying the board are included.

All datasheets and support documentation can be found at

Micrel’s web site at: www.micrel.com.

Features

• SY56020R 1.2V/1.8V/2.5V CML outputs

• Single 2.5V VCC with 1.2V/1.8V/2.5V VCCO supply

• AC-coupled configuration for ease-of-use

• I/O interface includes on-board termination

• Fully assembled and tested

• Reconfigurable for DC-coupled operation

Applications

• SY56020R Low Voltage 1.2V to 2.5V CML Differential

1:4 Fan-out Buffer with Input Equalization

___________________________________________________________________________________________________________

Evaluation Board

Micrel, Inc. SY56020R Evaluation Board

October 2008 2 M9999-100108-A

hbwhelp@micrel.com or (408) 955-1690

Evaluation Board Description

The SY56020R evaluation board is designed to accept

either AC-coupled or DC-coupled inputs; however, all

boards are shipped with DC-Coupled outputs. The DC-

coupled outputs allow the CML output to be connected

directly to a scope with the standard termination of 50Ω-

to-ground. This is accomplished by tying the body of the

SMA connectors to the VCCO supply on the evaluation

board so that the scope termination appears as 50Ω-to-

VCCO on the board. This allows the body of the SMA

connectors, which are scope GND, to appear at the

same potential as VCCO for the CML output drivers.

The choice between the two configurations, AC-Coupled

or DC-Coupled inputs, offers the user flexibility in

selecting the board that is right for the given application.

Step-by-step instructions for modifying an AC-coupled

evaluation board for DC-coupled operation are supplied

in the section “Modifying your AC-Coupled Board for DC-

Coupled Operation.”

If the output is connected to an AC-coupled 50Ω

termination, the 1.2V operation may not work due to a

200mV output level shift from the output coupling

capacitors.

SY56020R AC-Coupled Evaluation Board

(AC-Coupled Input, DC-Coupled Output)

For a 1.2V output configuration, the V CC of the board is

set to 2.5V and the VCCO is set to 1.2V. For a 1.8V output

configuration the VCCO is set to 1.8V. For a full 2.5V

operation, short VCCO to VCC. For all configurations the

VEE is set to 0V.

Setting up the AC-Coupled Evaluation Board

(AC-Coupled Input, DC-Coupled Output)

The following steps describe the procedure for setting up

the CML-output evaluation board:

Setting up the Power Supplies:

1. Set the voltage setting of a DC supply to 2.5V and

turn off the supply.

2. Set the voltage setting for a second DC supply to be

1.2V, 1.8V or 2.5V and turn off the supply.

3. 2.5V output operation can also be achieved by

shorting VCCO to VCC and operating with one supply.

4. Connect the negative terminal of the two power

supplies together and connect to the VEE terminal of

the evaluation board.

5. Do not earth ground either supply.

6. Turn on the power supplies and verify that the 2.5V

supply current is <90mA and 1.2V/1.8V/2.5V supply

is <90mA. If using one supply, <180mA.

7. Turn off the power supplies.

Setting up the AC-Coupled Input

1. Using a differential signal source set the HIGH level

of each side of the differential pair to be 0.4V and

the LOW level to be 0V. Note that for AC-coupled

inputs, only the signal swing is significant, since the

input will be re-biased after the series capacitor. The

amplitude of the input swing can be any value

between 200mV and 1.0V.

2. Using equal length 50Ω impedance coaxial cables,

connect the signal source to the desired attenuation

line and then connect to the input, IN and /IN, on the

evaluation board. Make sure the length of each

attenuation line is matched to each other.

3. The equalization can be selected through the EQ pin

(Pin 4), which is connected to the J15 jumper. The

EQ setting depends on the length of the attenuation

line. Please refer to Table 1 below for the desired

equalization selection.

EQ FR4 EQUALIZATION

LOW( L ) 9”

FLOAT 18”

HIGH( H ) 27”

Table 1. EQ Setting

Setting up the DC-Coupled Output

1. Using equal length 50Ω impedance coaxial cables

connect one of the SMA output pairs of the

evaluation board (Pin 15 and Pin 14 for Q0, Pin12

and Pin 11 for Q1, Pin 10 and Pin 9 for Q2, Pin 7

and Pin 6 for Q3) to the oscilloscope or other

measurement device that has an internal DC-

Coupled 50Ω termination. If only one true output is

connected to the oscilloscope, the complementary

output must still be terminated with a 50Ω

termination. Terminate all unused outputs into 50Ω,

otherwise reflections will distort the waveform being

monitored.

2. Turn on the power supplies and verify that the 2.5V

supply current is <90mA and 1.2V/1.8V/2.5V supply

is <90mA. And <180mA if using one supply.

3. Enable the signal source and monitor the outpu

Micrel, Inc. SY56020R Evaluation Board

October 2008 3 M9999-100108-A

hbwhelp@micrel.com or (408) 955-1690

Evaluation Board

SY56020R AC-Coupled Evaluation Board

Power Supply VCC VCCO VEE I/O

1.2V Output 2.5V 1.2V 0V AC-Coupled Input/DC-Coupled Output

1.8V Output 2.5V 1.8V 0V AC-Coupled Input/DC-Coupled Output

2.5V Output 2.5V 2.5V 0V AC-Coupled Input/DC-Coupled Output

Table 2. SY56020R AC-Coupled Evaluation Board Power Supply Connections

Produktspecifikationer

Varumärke:	Microchip
Kategori:	Inte kategoriserad
Modell:	SY56020R
Enhetsplacering:	Volledig ingebouwd
Typ av operation:	Knoppen
Inbyggd display:	Ja
Vikt:	43100 g
Bredd:	598 mm
Djup:	550 mm
Höjd:	865 mm
Nettoskatt:	2400 W
Antal platsinställningar:	14 couverts
Plugg typ:	Type F
Automatiska program:	Ja
Torksystem:	Warmtewisselaar/Zeoliet
Dörrfärg:	Niet van toepassing
Sladdlängd:	1.75 m
Fördröjd starttimer:	Ja
Startfördröjning:	24 uur
Indikering av återstående tid:	Ja
Wi-Fi-kontroll:	Ja
Cykelns längd:	295 min
Ljudnivå:	44 dB
Energie-efficiëntieklasse:	A
Förpackningens vikt:	45000 g
Lämplig för paneljustering:	Ja
Installationsfackets bredd:	608 mm
Installationsfack djup:	550 mm
Vattenförbrukning per cykel:	9.5 l
Nuvarande:	10 A
Installationsfack höjd (min):	865 mm
Bulleremissionsklass:	B
Antal tvättprogram:	6
Energiförbrukning per 100 cykler:	54 kWu
Djup när dörren är öppen:	1200 mm
Produktstorlek:	Volledige grootte (60 cm)
Färgkontrollpanel:	Zilver
Typ av bästa fack:	Lade
Kåpa material:	Roestvrijstaal
Golvindikatorlampa:	Ja
Varningssignal:	Ja
Doseringsassistent:	Ja
Automatisk detektering av tvättmedel:	Ja
Självrengörande filter:	Ja
AquaStop-funktion:	Ja
AquaSensor funktion:	Ja
Extra torr:	Ja
Glasskydd:	Ja
Halvlastad:	Ja
Tvättprogram:	90min 60°C, Auto 45-65°C, Eco 50°C, Favorite, Intensive 70°C, Quick 60°C, Silent 50°C
Avloppsslangens längd:	1.9 m
Vattentillförselslangens längd:	1.65 m
Övre korg justerbar höjd:	Ja
Installationsfack höjd (max):	925 mm
Temperatur (max):	70 °C
Nedre kupan:	Vouwbaar
Korgar justerbar placering:	Bovenste
Övre korgställ:	Vouwbaar
Hållbarhetscertifikat:	CE
Styr appar som stöds:	Bosch Home Connect
Överensstämmelse med hållbarhet:	Ja
Övre korg justerbar höjdnivåer:	3
Typ översta korg:	Siemens rackMatic
AC-ingångsspänning:	220 - 240 V
AC-ingångsfrekvens:	50/60 Hz
Energieffektivitetsskala:	A tot G
Anpassad panelvikt (max):	10000 g
Anpassad panelvikt (min):	3000 g
Bosch teknologier (disk):	Auto programme, Extra Dry, Home Connect, Hygiene+, InfoLight, PerfectDry, Rackmatic®, Silence On Demand, SpeedPerfect Plus, VarioDrawer, Zeolith technology