Micrel, Inc.
6GHz, 1:2 FANOUT BUFFER/TRANSlATOR Precision Edge
®
SY58013U
w/400mV lVPECl OUTPUTS and INTERNAl
SY58013U
INPUT TERMINATION
Precision Edge
®
FEATURES
■
Precision 1:2, 400mV lVPECl fanout buffer
■
low jitter performance:
■
Accepts an input signal as low as 100mV
■
Guaranteed AC performance over temperature and
voltage:
•
> 6GHz f
MAX
clock
•
< 250ps t
pd
•
< 15ps max. skew
■
Unique input termination and V
T
pin accepts
DC-coupled and AC-coupled differential
inputs: lVPECl, lVDS and CMl
■
400mV lVPECl compatible outputs
■
Power supply 2.5V ±5% and 3.3V ±10%
■
–40°C to +85°C temperature range
■
Available in 16-pin (3mm x 3mm) QFN package
•
< 80ps t
r
/t
f
times
•
55fs
RMS
phase jitter (typ)
Precision Edge
®
DESCRIPTION
The SY58013U is a 2.5V/3.3V precision, high-speed, fully
differential 1:2 LVPECL fanout buffer. Optimized to provide
two identical output copies with less than 15ps of skew and
only 55fs
RMS
phase jitter, the SY58013U can process clock
signals as fast as 6GHz or data patterns up to 10.7Gbps.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that interfaces to LVPECL, LVDS,
and CML differential signals, (AC- or DC-coupled) as small
as 100mV without any level-shifting or termination resistor
networks in the signal path. For AC-coupled input interface
applications, an on-board output reference voltage (V
REF-
AC
) is provided to bias the V
T
pin. The outputs are 400mV
LVPECL compatible, with extremely fast rise/fall times
guaranteed to be less than 80ps.
The SY58013U operates from a 2.5V ±5% supply or
3.3V ±10% supply and is guaranteed over the full industrial
temperature range (–40°C to +85°C). For applications that
require greater output swing or CML compatible outputs,
consider the SY58012U 1:2 fanout buffer with 800mV
LVPECL outputs, or the SY58011U 1:2 fanout buffer with
400mV CML outputs. The SY58013U 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.
APPlICATIONS
■
■
■
■
■
All SONET and All GigE clock distribution
Fibre Channel clock and data distribution
Backplanes
Data distribution: OC-48, OC-48+FEC, XAUI
High-end, low-skew, multiprocessor synchronous
clock distribution
FUNCTIONAl BlOCk DIAGRAM
TYPICAl PERFORMANCE
United States Patent No. RE44,134
Precison Edge is a registered trademark of Micrel, Inc.
M9999-063010
hbwhelp@micrel.com or (408) 955-1690
2GHz with 100mV Input
1
Rev.: F
Amendment: /0
Issue Date: November 2011
Micrel, Inc.
Precision Edge
®
SY58013U
PACkAGE/ORDERING INFORMATION
Ordering Information
(1)
Part Number
SY58013UMG
(3)
SY58013UMGTR
(2, 3)
Package
Type
QFN-16
Pb-Free
QFN-16
Pb-Free
Operating
Range
Industrial
Industrial
Package
Marking
013U with
Pb-Free bar-line indicator
013U with
Pb-Free bar-line indicator
16-Pin QFN
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC electricals only.
All devices are Pb-Free.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
1, 4
state
2
3
VT
VREF-AC
Pin Name
IN, /IN
Pin Function
Differential Input: This input pair is the signal to be buffered. Each pin is internally
terminated with 50 ohms to the V
T
pin. Note that this input will default to an indeterminate
if left open. See
“Input Interface Applications”
section.
Input Termination Center-Tap: Each input terminates to this pin. The V
T
pin provides a
center-tap for each input (IN, /IN) to a termination network for maximum interface flexibility.
See
“Input Interface Applications”
section.
Reference Output Voltage: This output biases to V
CC
–1.2V. It is used for AC-coupled
inputs (IN, /IN). Connect V
REF-AC
directly to the V
T
pin. Bypass with 0.01µF low ESR
capacitor to V
CC
. Maximum curent source or sink is 0.5mA. See
“Input Interface
Applications”
section.
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the
V
CC
pins as possible.
5, 8, 13, 16
6, 7, 14, 15
12, 11
9, 10
VCC
GND,
(Exposed Pad)
Q0, /Q0,
Q1, /Q1
Ground. Exposed pad must be connected to a ground plane that is the same potential
as the ground pin.
LVPECL Differential Output Pairs: Differential buffered output copy of the input signal. The
output swing is typically 400mV. Unused output pairs may be left floating with no impact on
jitter. See “LVPECL
Output Termination”
section.
M9999-063010
hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
Precision Edge
®
SY58013U
Power Supply Voltage (V
CC
) ........................–0.5V to+4.0V
Input Voltage (V
IN
) ...........................................–0.5V to V
CC
Output Current (I
OUT
)
Continuous ............................................................. 50mA
Surge .................................................................... 100mA
V
T
Current
Source or sink current on V
T
pin......................... ±100mA
Input Current
Source or sink current on (IN, /IN) ........................ ±50mA
V
REF
Current
Source or sink current on V
REF
-AC,
Note 4
........ ±1.5mA
Soldering, (20 sec.) ................................................... 260°C
Storage Temperature Range (T
STORE
) ........ –65 to +150°C
Absolute Maximum Ratings
(Note 1)
Operating Ratings
(Note 2)
Power Supply Voltage (V
CC
) ................. +2.375V to +3.60V
Operating Temperature Range (T
A
) ............ –40°C to +85°C
Package Thermal Resistance,
Note 3
QFN (θ
JA
)
Still-Air
.............................................................................
60°C/W
500lpfm
...........................................................................
54°C/W
QFN (ψ
JB
)
.........................................................................
33°C/W
DC ElECTRICAl CHARACTERISTICS
(Note 5)
T
A
= –40°C to +85°C
Symbol
V
CC
V
IH
I
CC
Parameter
Power Supply Voltage
Power Supply Current
Input HIGH Voltage
Input LOW Voltage
Input Voltage Swing
Differential Input Voltage
Output Reference Voltage
In to V
T
Resistance
IN, /IN, Note 6
IN, /IN
IN, /IN; see Figure 1a
IN, /IN; see Figure 1b
Max. V
CC
, no load
Condition
Min
2.375
75
V
CC
–1.6
0
0.1
0.2
40
50
60
1.28
V
CC
–1.3 V
CC
–1.2 V
CC
–1.1
Typ
Max
3.60
90
V
IH
–0.1
1.7
V
CC
Units
V
mA
V
V
V
V
ohms
V
V
V
IL
V
IN
V
DIFF_IN
R
IN
IN to V
T
V
REF
-AC
lVPECl DC ElECTRICAl CHARACTERISTICS
(Note 5)
Symbol
V
OH
V
OL
V
OUT
V
CC
= 3.3V ±10% or V
CC
= 2.5 ±5%; R
L
= 50ohms to V
CC
–2V; T
A
= –40°C to 85°C, unless otherwise stated.
Parameter
Condition
Min
Output HIGH Voltage
Output LOW Voltage
Output Voltage Swing
Q0, /Q0, Q1, /Q1
Q0, /Q0, Q1, /Q1
Q0, /Q0, Q1, /Q1; see Figure 1a
Typ
Max
Units
V
V
mV
mV
V
CC
–1.145 V
CC
–1.020 V
CC
–0.895
V
CC
–1.545 V
CC
–1.420 V
CC
–1.295
200
400
V
DIFF_OUT
Note 1.
Differential Output Voltage Swing Q0, /Q0, Q1, /Q1; see Figure 1b
400
800
Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not
implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratings condi-
tions for extended periods may affect device reliability.
The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Thermal performance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB.
Due to the limited drive capability, use for input of the same package only.
V
IH
(min) not lower than 1.2V.
Note 2.
Note 3.
Note 4.
Note 6.
Note 5.
The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
M9999-063010
hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
Precision Edge
®
SY58013U
AC ElECTRICAl CHARACTERISTICS
(Note 7)
V
CC
= 2.5V ±5% or 3.3V ±10%; T
A
= –40°C to +85°C; R
L
= 50ohms to V
CC
–2V, unless otherwise stated.
Symbol
f
MAX
t
pd
Parameter
Condition
Maximum Operating Frequency
Propagation Delay
Channel-to-Channel Skew
Part-to-Part Skew
Random Jitter
Output Rise/Fall Time
V
IN
x 100mV
V
OUT
x 200mV
NRZ Data
Clock
6
100
180
4
55
20
50
80
250
15
100
Min
Typ
10
Max
Units
Gbps
GHz
ps
ps
ps
fs
ps
t
CHAN
t
SKEW
t
JITTER
t
r
, t
f
Note 7.
Note 8.
Note 8
Note 9
Output = 622MHz
Integration Range: 12kHz-20MHz
20% to 80%, at full output swing
High frequency AC electricals are guaranteed by design and characterization.
Skew is measured between outputs of the same bank under identical transitions.
Note 9.
Skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective
inputs.
PHASE NOISE
TIMING DIAGRAM
M9999-063010
hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
Precision Edge
®
SY58013U
TIMING DIAGRAM
SINGlE-ENDED AND DIFFERENTIAl SwINGS
Figure 1a. Single-Ended Voltage Swing
Figure 1b. Differential Voltage Swing
M9999-063010
hbwhelp@micrel.com or (408) 955-1690
5
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