1
Precision EdgeTM
SY58600U
Micrel
M9999-061504
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
s
Guaranteed AC performance over temperature and
voltage:
DC-to >10.7Gbps data rate throughput
DC-to >7GHz clock f
MAX
<220ps in-to-out t
pd
t
r
/ t
f
<60ps
s
Ultra low-jitter design:
<1ps
rms
random jitter
<10ps
pp
deterministic jitter
<10ps
pp
total jitter (clock)
s
Minimum input swing 200mV (|IN/IN|)
s
Unique, patent-pending input termination and VT pin
accepts DC-coupled and AC-coupled inputs (CML,
PECL, LVDS)
s
Internal 50
output source termination
s
Typical 400mV CML output swing
s
Power supply 2.5V
5% or 3.3V
10%
s
40
C to 85
C industrial temperature range
s
Available in an ultra-small (2mm
2mm) 8-pin
MLFTM package
FEATURES
ULTRA-PRECISION DIFFERENTIAL
CML LINE DRIVER/RECEIVER
WITH INTERNAL TERMINATION
Precision EdgeTM
SY58600U
APPLICATIONS
s
Backplane buffering
s
OC-12 to OC-192 SONET/SDN clock/data distribution
s
All Gigabit Ethernet distribution
s
Fibre Channel distribution
Rev.: A
Amendment: /0
Issue Date:
June 2004
The SY58600U is a 2.5V/3.3V precision, high-speed,
differential receiver capable of handling clocks up to 7GHz
and data streams up to 10.7Gbps.
The differential input includes Micrel's unique, 3-pin input
termination architecture that allows users to interface to any
differential signal (AC or DC-coupled) as small as 200mV
pp
without any level shifting or termination resistor networks in
the signal path. The outputs are 400mV CML, with extremely
fast rise/fall times guaranteed to be less than 60ps.
The SY58600U operates from a 2.5V
5% supply or a
3.3V
10% supply and is guaranteed over the full industrial
temperature range of 40
C to +85
C. For applications
that require 800mV LVPECL outputs, consider the
SY58601U or for 400mV LVPECL outputs the SY58602U.
The SY58600U is part of Micrel's high-speed, Precision
EdgeTM product line.
All support documentation can be found on Micrel's web
site at www.micrel.com.
FUNCTIONAL BLOCK DIAGRAM
TYPICAL APPLICATION
Precision Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
Precision EdgeTM
V
T
IN
/IN
50
50
Q
/Q
V
REF-AC
100mV Input Swing
Input Waveform
SY58600U
Backplane
400mV Output Swing
100mV
Output Waveform
400mV
2
Precision EdgeTM
SY58600U
Micrel
M9999-061504
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
Pin Number
Pin Name
Pin Function
1, 4
IN, /IN
Differential Input: This input pair is the signal to be buffered. These inputs accept AC or DC-
coupled signals as small as 100mV. Each pin of this pair internally terminates to a VT pin
through 50
. Note that this input will default to an indeterminate state if left open. Please
refer to the "Input Interface Applications" section for more details.
2
VT
Input Termination Center-Tap: Each side of the differential input pair terminates to this pin.
The VT pin provides a center-tap to a termination network for maximum interface flexibility.
See "Input Interface Applications" section for more details.
3
VREF-AC
Reference Output Voltage: This output biases to V
CC
1.2V. Connect to VT pin when AC-
coupling the input. Bypass with 0.01
F low ESR capacitor to V
CC
. Maximum current source
or sink is 0.5mA. See "Input Interface Applications" section.
8
VCC
Positive Power Supply. Bypass with 0.1
F||0.01
F low ESR capacitors as close to the VCC
pin as possible.
7, 6
Q, /Q
Differential CML Output: Differential buffered output copy of the input signal. The differential
output swing is typically 800mV into a 50
load, or 100
across the pair. See "Output
Interface Applications" section.
5
GND,
Ground. Ground pin and exposed pad must be connected to the same ground plane.
Exposed
PIN DESCRIPTION
1
IN
VT
VREF-AC
/IN
8
VCC
Q
/Q
GND
7
6
5
2
3
4
8-Pin MLFTM (MLF-8)
Ordering Information
(1)
Package
Operating
Package
Part Number
Type
Range
Marking
SY58600UMITR
(2)
MLF-8
Industrial
600
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25
C,
DC electricals only.
2. Tape and Reel.
3
Precision EdgeTM
SY58600U
Micrel
M9999-061504
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings
(1)
Supply Voltage (V
CC
) .................................. 0.5V to +4.0V
Input Voltage (V
IN
) ......................................... 0.5V to V
CC
CML Output Voltage (V
OUT
) ......... V
CC
1.0V to V
CC
+0.5V
Termination Current
(3)
Source or Sink Current on V
T ....................................
100mA
Input Current
Source or Sink Current on IN, /IN ........................
50mA
Current (V
REF
)
Source or Sink Current on V
REF
AC ..................
1.5mA
Lead Temperature (soldering, 10 sec.) ................... +265
C
Storage Temperature (T
S
) ....................... 65
C to +150
C
Operating Ratings
(2)
Supply Voltage (V
CC
) ...................... +2.375V to +2.625V or
............................................................ +3.0V to +3.6V
Ambient Temperature (T
A
) ......................... 40
C to +85
C
Package Thermal Resistance
(4)
MLFTM
(
JA
)
Still-Air ............................................................. 93
C/W
MLFTM
(
JB
)
Junction-to-Board ............................................ 32
C/W
T
A
= 40
C to +85
C, unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
CC
Power Supply
V
CC
= 2.5V
2.375
2.5
2.625
V
V
CC
= 3.3V
3.0
3.3
3.6
V
I
CC
Power Supply Current
No Load, max. V
CC
,
Note 6
45
65
mA
R
DIFF_IN
Differential Input Resistance
80
100
120
(IN-to-/IN)
R
IN
Input Resistance
40
50
60
(IN-to-V
T
, /IN-to-V
T
)
V
IH
Input HIGH Voltage
Note 7
V
CC
1.6
V
CC
V
(IN, /IN)
V
IL
Input LOW Voltage
0
V
IH
0.1
V
(IN, /IN)
V
IN
Input Voltage Swing
See Figure 1a.
0.1
1.7
V
(IN, /IN)
V
DIFF_IN
Differential Input Voltage Swing
See Figure 1b.
0.2
3.4
V
|IN, /IN|
V
T_IN
In-to-V
T
1.28
V
(IN, /IN)
V
REFAC
Output Reference Voltage
V
CC
1.3 V
CC
1.2 V
CC
1.1
V
Notes:
1. Permanent device damage may occur if the ratings in "Absolute Maximum Ratings" section are exceeded. This is a stress rating only and functional
operation is not implied for 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.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Due to the limited drive capability use for input of the same package only.
4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB.
JB
uses 4-layer
JA
in still-air, unless otherwise stated.
5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
6. Includes current through internal 50
pull-ups.
7. V
IH
(min) not lower than 1.2V.
DC ELECTRICAL CHARACTERISTICS
(5)
4
Precision EdgeTM
SY58600U
Micrel
M9999-061504
hbwhelp@micrel.com or (408) 955-1690
V
CC
= 2.5V
5% or 3.3V
10%; T
A
= 40
C to +85
C; R
L
= 100
across output pair or equivalent, unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
f
MAX
Maximum Operating Frequency
NRZ Data
10.7
Gbps
V
OUT
200mV
Clock
7
GHz
t
pd
Propagation Delay
IN-to-Q
70
125
220
ps
t
pd
Tempco
Differential Propagation Delay
115
fs/
C
Temperature Coefficient
t
JITTER
Data
Random Jitter (RJ)
Note 10
1
ps
rms
Deterministic Jitter (DJ)
Note 11
10
ps
pp
Clock
Cycle-to-Cycle Jitter
Note 12
1
ps
rms
Total Jitter (TJ)
Note 13
10
ps
pp
t
r
, t
f
Output Rise/Fall Times
Q, /Q
(20% to 80%) At full output swing.
20
40
60
ps
Notes:
8. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
9. High frequency AC electricals are guaranteed by design and characterization.
10. Random jitter is measured with a K28.7 comma detect character pattern, measured at 2.5Gbps/3.2Gbps.
11. Deterministic jitter is measured at 2.5Gbps/3.2Gbps with both K28.5 and 2
23
1 PRBS pattern.
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.
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
(9)
V
CC
= 2.5V
5% or 3.3V
10%; T
A
= 40
C to +85
C; R
L
= 100
across output pair or equivalent, unless otherwise noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
OH
Output HIGH Voltage
V
CC
0.020 V
CC
0.010
V
CC
V
Q, /Q
V
OUT
Output Voltage Swing
See Figure 1a.
325
400
mV
Q, /Q
V
DIFF_OUT
Differential Output Voltage Swing
See Figure 1b.
650
800
mV
Q, /Q
R
OUT
Output Source Impedance
40
50
60
Q, /Q
CML OUTPUTS DC ELECTRICAL CHARACTERISTICS
(8)
5
Precision EdgeTM
SY58600U
Micrel
M9999-061504
hbwhelp@micrel.com or (408) 955-1690
TIMING DIAGRAM
V
IN,
V
OUT
400mV
(typical)
Figure 1a. Single-Ended Swing
800mV (typical)
V
DIFF_IN
,
V
DIFF_OUT
Figure 1b. Differential Swing
IN
/IN
t
pd
Q
/Q
DEFINITION OF SINGLE-ENDED AND DIFFERENTIAL SWINGS
INPUT AND OUTPUT STAGE INTERNAL TERMINATION
50
/IN
V
CC
50
IN
V
T
GND
Figure 2a. Simplified Differential Input Stage
50
50
/Q
Q
V
CC
GND
Figure 2b. Simplified Differential Output Stage
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