Instrukcja obsługi Microchip SY56020R


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SY56020R
Low Voltage 1.2V/1.8V/2.5V CML 1:4
Fanout Buffer 6.4Gbps with Equalization
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000http://www.micrel.com
General Description
The SY56020R is a fully-differential, low-voltage
1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with input
equalization. The SY56020R can process clock signals
as fast as 4.5GHz or data patterns up to 6.4Gbps.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that interfaces to CML
differential signals, without any level-shifting or
termination resistor networks in the signal path. The
differential input can also accept AC-coupled LVPECL
and LVDS signals. Input voltages as small as 200mV
(400mVpp) are applied before the 9”, 18” or 27” FR4
transmission line. For AC-coupled input interface
applications, an internal voltage reference is provided to
bias the VT pin. The outputs are CML, with extremely
fast rise/fall times guaranteed to be less than 90ps.
The SY56020R operates from a 2.5V ±5% core supply
and a 1.2V, 1.8V or 2.5V ±5% output supply and is
guaranteed over the full industrial temperature range
(–40°C to +85°C). The SY56020R is part of Micrel’s
high-speed, Precision Edge® product line.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Functional Block Diagram
Precision Edge®
Features
1.2V/1.8V/2.5V CML 1:4 Fanout Buffer
Equalizes 9, 18, 27 inches of FR4
Guaranteed AC performance over temperature and
voltage:
DC-to > 6.4Gbps Data throughput
DC-to > 4.5GHz Clock throughput
<280 ps propagation delay (IN-to-Q)
<15ps within-device skew
<90ps rise/fall times
Ultra-low jitter design
<1psRMS random jitter
High-speed CML outputs
2.5V ±5% VCC , 1.2/1.8V/2.5V ±5% VCCO power supply
operation
Industrial temperature range: –40°C to +85°C
Available in 16-pin (3mm x 3mm) QFN package
Applications
Data distribution
SONET clock and data distribution
Fiber Channel clock and data distribution
Gigabit Ethernet clock and data distribution
Markets
Storage
ATE
Test and measurement
Enterprise networking equipment
High-end servers
Metro area network equipment
November 2010 M9999-111810-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc. SY56020R
November 2010 2 M9999-111810-A
hbwhelp@micrel.com
Ordering Information
Part Number Package Type Operating Range Package Marking Lead Finish
SY56020RMG QFN-16 Industrial R020 with Pb-Free bar-line indicator NiPdAu
Pb-Free
SY56020RMGTR(2) QFN-16 Industrial R020 with Pb-Free bar-line indicator NiPdAu
Pb-Free
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A = 25°C, DC Electricals only.
2. Tape and Reel.
Pin Configuration
16-Pin QFN
Truth Table
EQ Equalization FR4 6mil Stripline
LOW 9”
FLOAT 18”
HIGH 27”
or (408) 955-1690
Micrel, Inc. SY56020R
November 2010 3 M9999-111810-A
hbwhelp@micrel.com or (408) 955-1690
Pin Description
Pin Number Pin Name Pin Function
2,3 IN, /IN
Differential Input: Signals as small as 200mV VPK (400mVPP) applied to the input of 9, 18 or 27
inches 6mil FR4 stripline transmission line are then terminated with this differential input. Each input
pin internally terminates with 50 to the VT pin.
1 VT
Input Termination Center-Tap: Each side of the differential input pair terminates to VT pin. This pin
provides a center-tap to a termination network for maximum interface flexibility. An internal high
impedance resistor divider biases VT to allow input AC-coupling. For AC-coupling, bypass VT with
0.1µF low-ESR capacitor to VCC. See “Interface Applications” subsection and Figure 2a.
4 EQ Three level input for equalization control. High, float, low.
16 VCC Positive Power Supply: Bypass with 0.1µF//0.01µF low-ESR capacitors as close to the V
CC pins as
possible. Supplies input and core circuitry.
8,13 VCCO Output Supply: Bypass with 0.1µF//0.01µF low-ESR capacitors as close to the V
CCO pins as
possible. Supplies the output buffers.
5 GND,
Exposed pad
Ground: Exposed pad must be connected to a ground plane that is the same potential as the
ground pins.
15,14
12,11
10,9
7,6
Q0, /Q0
Q1, /Q1
Q2, /Q2
Q3, /Q3
CML Differential Output Pairs: Differential buffered copy of the input signal. The output swing is
typically 390mV. See “Interface Applications” subsection for termination information.


Specyfikacje produktu

Marka: Microchip
Kategoria: nieskategoryzowany
Model: SY56020R

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