1
Precision EdgeTM
SY58013U
Micrel
6GHz, 1:2 FANOUT BUFFER/
TRANSLATOR w/400mV LVPECL OUTPUTS
and INTERNAL INPUT TERMINATION
Precision EdgeTM
SY58013U
Rev.: A
Amendment: /0
Issue Date:
July 2003
DESCRIPTION
s
Precision 1:2, 400mV LVPECL fanout buffer
s
Guaranteed AC performance over temperature and
voltage:
> 6GHz f
MAX
clock
< 80ps t
r
/t
f
times
< 250ps t
pd
< 15ps max. skew
s
Low jitter performance:
< 10ps
(pk-pk)
total jitter (clock)
< 1ps
(rms)
random jitter (data)
< 10ps
(pk-pk)
deterministic jitter (data)
s
Accepts an input signal as low as 100mV
s
Unique input termination and V
T
pin accepts DC-
coupled and AC-coupled differential
inputs: LVPECL, LVDS and CML
s
400mV LVPECL compatible outputs
s
Power supply 2.5V
5% and 3.3V
10%
s
40
C to +85
C temperature range
s
Available in 16-pin (3mm
3mm) MLFTM package
FEATURES
APPLICATIONS
s
All SONET and All GigE clock distribution
s
Fibre Channel clock and data distribution
s
Backplanes
s
Data distribution: OC-48, OC-48+FEC, XAUI
s
High-end, low-skew, multiprocessor synchronous
clock distribution
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
less than 10ps
(pk-pk)
total 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-coupled 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 EdgeTM product line. Data sheets and
support documentation can be found on Micrel's web site at
www.micrel.com.
FUNCTIONAL BLOCK DIAGRAM
Precison Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
IN
/IN
Q1
/Q1
Q0
/Q0
V
T
50
50
V
REF
-AC
TYPICAL PERFORMANCE
2GHz Output
TIME (70ps/div.)
Output Swing
(100mV/div
.
)
V
CC
= 3.3V
2GHz with 100mV Input
Precision EdgeTM
2
Precision EdgeTM
SY58013U
Micrel
PACKAGE/ORDERING INFORMATION
Ordering Information
(Note 1)
Package
Operating
Package
Part Number
Type
Range
Marking
SY58013UMI
MLF-16
Industrial
013U
SY58013UMITR
(Note 2)
MLF-16
Industrial
013U
Note 1.
Contact factory for die availability. Die are guaranteed at T
A
=
25
C, DC electricals only.
Note 2.
Tape and Reel.
Pin Number
Pin Name
Pin Function
1, 4
IN, /IN
Differential Input: This input pair is the signal to be buffered. Each pin is internally
terminated with 50
to the V
T
pin. Note that this input will default to an indeterminate state
if left open. See
"Input Interface Applications"
section.
2
VT
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.
3
VREF-AC
Reference Output Voltage: This output biases to V
CC
1.4V. It is used for AC-coupled
inputs (IN, /IN). Connect V
REF-AC
directly to the V
T
pin. Bypass with 0.01
F low ESR
capacitor to V
CC
. Maximum curent source or sink is 0.5mA. See
"Input Interface
Applications"
section.
5, 8, 13, 16
VCC
Positive Power Supply: Bypass with 0.1
F//0.01
F low ESR capacitors as close to the
V
CC
pins as possible.
6, 7, 14, 15
GND,
Ground. Exposed pad must be connected to a ground plane that is the same potential
(Exposed Pad)
as the ground pin.
12, 11
Q0, /Q0,
LVPECL Differential Output Pairs: Differential buffered output copy of the input signal. The
9, 10
Q1, /Q1
output swing is typically 400mV. Unused output pairs may be left floating with no impact on
jitter. See "
LVPECL Output Termination"
section.
PIN DESCRIPTION
1
2
3
4
12
11
10
9
16 15 14 13
5
6
7
8
IN
VT
VREF-AC
/IN
Q0
/Q0
/Q1
Q1
VCC
GND
GND
VCC
VCC
GND
GND
VCC
16-Pin MLFTM
3
Precision EdgeTM
SY58013U
Micrel
Absolute Maximum Ratings
(Note 1)
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, (10 sec.) ................................................... 270
C
Storage Temperature Range (T
STORE
) ....... 65 to +150
C
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
MLFTM
(
JA
)
Still-Air ............................................................. 60
C/W
500lpfm ............................................................ 54
C/W
MLFTM (
JB
) ....................................................... 33
C/W
T
A
= 40
C to +85
C
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
CC
Power Supply Voltage
2.375
3.60
V
I
CC
Power Supply Current
Max. V
CC
, no load
75
90
mA
V
IH
Input HIGH Voltage
IN, /IN, Note 6
V
CC
1.6
V
CC
V
V
IL
Input LOW Voltage
IN, /IN
0
V
IH
0.1
V
V
IN
Input Voltage Swing
IN, /IN; see Figure 1a
0.1
1.7
V
V
DIFF_IN
Differential Input Voltage
IN, /IN; see Figure 1b
0.2
3.4
V
R
IN
In to V
T
Resistance
40
50
60
V
REF
-AC
Output Reference Voltage
V
CC
1.525 V
CC
1.4 V
CC
1.325
V
IN to V
T
1.28
V
DC ELECTRICAL CHARACTERISTICS
(Note 5)
V
CC
= 3.3V
10% or V
CC
= 2.5
5%; R
L
= 50
to V
CC
2V; T
A
= 40
C to 85
C, unless otherwise stated.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OH
Output HIGH Voltage
Q0, /Q0, Q1, /Q1
V
CC
1.145 V
CC
1.020 V
CC
0.895
V
V
OL
Output LOW Voltage
Q0, /Q0, Q1, /Q1
V
CC
1.545 V
CC
1.420 V
CC
1.295
V
V
OUT
Output Voltage Swing
Q0, /Q0, Q1, /Q1; see Figure 1a
200
400
mV
V
DIFF_OUT
Differential Output Voltage Swing
Q0, /Q0, Q1, /Q1; see Figure 1b
400
800
mV
Note 1.
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 conditions for extended periods may affect device reliability.
Note 2.
The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Note 3.
Thermal performance assumes exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB.
Note 4.
Due to the limited drive capability, use for input of the same package only.
Note 5.
The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
Note 6.
V
IH
(min.) not lower than 1.2V.
LVPECL DC ELECTRICAL CHARACTERISTICS
(Note 5)
4
Precision EdgeTM
SY58013U
Micrel
TIMING DIAGRAM
/IN
IN
/Q
Q
t
pd
SINGLE-ENDED AND DIFFERENTIAL SWINGS
V
IN
,
V
OUT
(Typ. 400mV)
Figure 1a. Single-Ended Voltage Swing
V
DIFF_IN
,
V
DIFF_OUT
(Typ. 800mV)
Figure 1b. Differential Voltage Swing
V
CC
= 2.5V
5% or 3.3V
10%; T
A
= 40
C to +85
C; R
L
= 50
to V
CC
2V, unless otherwise stated.
Symbol
Parameter
Condition
Min
Typ
Max
Units
f
MAX
Maximum Operating Frequency
NRZ Data
10
Gbps
V
OUT
200mV
Clock
6
GHz
t
pd
Propagation Delay
V
IN
100mV
100
180
250
ps
t
CHAN
Channel-to-Channel Skew
Note 8
4
15
ps
t
SKEW
Part-to-Part Skew
Note 9
100
ps
t
JITTER
Data
Random Jitter (RJ)
Note 10
1
ps(rms)
Deterministic Jitter (DJ)
Note 11
10
ps(pk-pk)
Clock
Cycle-to-Cycle Jitter
Note 12
1
ps(rms)
Total Jitter (TJ)
Note 13
10
ps(pk-pk)
t
r
, t
f
Output Rise/Fall Time
20% to 80%, at full output swing
20
50
80
ps
Note 7.
High frequency AC electricals are guaranteed by design and characterization.
Note 8.
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.
Note 10. RJ is measured with a K28.7 comma detect character pattern, measured at 10.7Gbps and 2.5Gbps/3.2Gbps.
Note 11. DJ is measured at 10.7Gbps and 2.5Gbps/3.2Gbps with both K28.5 and 2
23
1 PRBS pattern
Note 12. Cycle-to-cycle jitter definition: The variation of periods between adjacent cycles, T
n
T
n1
where T is the time between rising edges of the
output signal.
Note 13. Total jitter definition: With an ideal clock input of frequency
f
MAX
, no more than one output edge in 10
12
output edges will deviate by more
than the specified peak-to-peak jitter value.
AC ELECTRICAL CHARACTERISTICS
(Note 7)
5
Precision EdgeTM
SY58013U
Micrel
TYPICAL OPERATING CHARACTERISTICS
V
CC
= 3.3V, GND = 0, V
IN
= 100mV, T
A
= 25
C, unless otherwise stated.
0
1
2
3
4
5
6
7
8
9
10
-40 -20
0
20
40
60
80 100
WITHIN-DEVICE SKEW (ps)
TEMPERATURE (
C)
Within-Device Skew vs.
Temperature
155
160
165
170
175
180
185
190
0
200
400
600
800
1000
PROPAGATION DELAY (ps)
INPUT VOLTAGE SWING (V)
Propagation Delay vs.
Input Voltage Swing
135
140
145
150
155
160
165
170
175
180
185
190
195
-40 -20
0
20
40
60
80 100
PROPAGATION DELAY (ps)
TEMPERATURE (
C)
Propagation Delay vs.
Temperature
250
300
350
400
450
0
1000 2000 3000 4000 5000 6000
AMPLITUDE (mV)
FREQUENCY (MHz)
Frequency vs. Amplitude
PDF 
ZIP