1
Precision EdgeTM
SY58024U
Micrel
M9999-091404
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
s
Guaranteed AC performance over temperature and
voltage:
>10.7Gbps data throughput
<60ps t
r
/t
f
times
<350ps t
pd
(IN-to-Q)
<20ps skew
s
Low jitter:
<10ps
pp
total jitter (clock)
<1ps
rms
random jitter (data)
<10ps
pp
deterministic jitter (data)
s
Crosstalk induced jitter: <0.7ps
rms
s
Unique, patent-pending input isolation minimizes
adjacent channel crosstalk
s
Accepts an input signal as low as 100mV
s
Unique, patent-pending input termination and VT pin
accepts DC-coupled and AC-coupled differential
inputs: LVPECL, LVDS, and CML
s
Fully differential inputs/outputs
s
50
source terminated CML outputs
s
Power supply 2.5V
5% and 3.3V
10%
s
Industrial 40
C to +85
C temperature range
s
Available in 32-pin (5mm
5mm) MLFTM package
FEATURES
Rev.: B
Amendment: /0
Issue Date:
September 2004
The SY58024U is a 2.5V/3.3V precision, high-speed, fully
differential dual CML crosspoint switch. The SY58024U is
optimized to provide two identical output copies with less
than 20ps of skew and ultra-low jitter. The SY58024U 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 allows the SY58024U to directly
interface to LVPECL, LVDS, and CML differential signal
(AC- or DC-coupled) without any level-shifting or termination
resistor networks in the signal path. The CML outputs
features a 400mV typical swing into 50
loads, and provides
an extremely fast rise/fall time guaranteed to be less than
60ps.
The SY58024U 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 high-speed single channel CML switches, consider
the SY58023U. The SY58024U is part of Micrel's high-
speed, Precision EdgeTM product line.
Data sheets and support documentation can be found on
Micrel's website at www.micrel.com.
Precision Edge is a trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
Precision EdgeTM
APPLICATIONS
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Gigabit Ethernet data/clock routing
s
SONET data/clocking routing
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Switch fabric clock routing
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Redundant switchover
s
Backplane redundancy
Precision EdgeTM
SY58024U
ULTRA-LOW JITTER DUAL 2
2
CROSSPOINT SWITCH w/ CML OUTPUTS
AND INTERNAL I/O TERMINATION
2
Precision EdgeTM
SY58024U
Micrel
M9999-091404
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
Ordering Information
(1)
Package Operating
Package
Lead
Part Number
Type
Range
Marking
Finish
SY58024UMI
MLF-32
Industrial
SY58024U
Sn-Pb
SY58024UMITR
(2)
MLF-32
Industrial
SY58024U
Sn-Pb
SY58024UMY
MLF-32
Industrial
SY58024U
Pb-Free
with "Y" designator
SY58024UMYTR
(2)
MLF-32
Industrial
SY58024U
Pb-Free
with "Y" designator
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25
C, DC
electricals only.
2. Tape and Reel.
Pin Number
Pin Name
Pin Function
25, 27
INA0, /INA0,
Differential Signal: Each pin of this pair internally terminates with 50
to the VT pin. The
29, 31,
INA1, /INA1,
input will default to an indeterminate state if left open. See "Input Interface
1, 3,
INB1, /INB1
Application" section.
5, 7
INB0, /INB0
26, 30
VTA0, VTA1,
Input Termination Center-Tap: Each input terminates to this pin. The VT pin provides a
2, 6
VTB1, VTB0
center-tap for each input (IN, /IN) to a termination network for maximum interface flexibility.
See "Input Interface Application" section.
32, 28,
SELA0, SELA1,
Select Input: TTL/CMOS select input controls that selects inputs IN0, or IN1, for their
8, 4
SELB1, SELB0
respective banks A and B. Each input is internally connected to a 25k
pull-up
resistor and will default to a logic high state if left open.
9,24
GND,
Ground. Exposed pad must be connected to a ground plane that is the same potential as the
Exposed Pad
device ground pins.
10,13,16,
VCC
Positive Power Supply: Bypass with 0.1
F
0.01
F low ESR capacitors as close to the V
CC
17, 20, 23
pins as possible.
11, 12,
/QB0, QB0,
CML Differential Output Pairs: Differential buffered output copy of the selected input signal.
14, 15
QB1, /QB1,
The CML single-ended output swing is typically 400mV into 50
or 100
across the pair.
18, 19,
/QA1, QA1,
Unused output pairs may be left floating with no impact on jitter. See "CML Output
21, 22
/QA0, QA0
Termination" section.
PIN DESCRIPTION
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
9 10 11 12 13 14 15 16
32 3130 29 28 27 26 25
INB1
VTB1
/INB1
SELB0
INB0
VTB0
/INB0
SELB1
GND
VCC
QA0
/QA0
VCC
QA1
/QA1
VCC
SELA1
INA1
VT
A1
/IN A1
SELA0
/INA0
VT
A0
INA0
VCC
QB0
/QB0
VCC
GND
QB1
/QB1
VCC
32-Pin MLFTM (MLF-32)
SELA0
SELA1
QA0
QA1
SELB0
SELB1
QB0
QB1
0
0
INA0
INA0
0
0
INB0
INB0
0
1
INA0
INA1
0
1
INB1
INB1
1
0
INA1
INA0
1
0
INB1
INB0
1
1
INA1
INA1
1
1
INB1
INB1
TRUTH TABLE
3
Precision EdgeTM
SY58024U
Micrel
M9999-091404
hbwhelp@micrel.com or (408) 955-1690
FUNCTIONAL BLOCK DIAGRAM
INA0
/INA0
QA1
/QA1
QA0
/QA0
V
TA0
50
50
INA1
/INA1
V
TA1
50
50
SELA0
SELA1
0
1
0
1
INB0
/INB0
QB1
/QB1
QB0
/QB0
V
TB0
50
50
INB1
/INB1
V
TB1
50
50
SELB0
SELB1
0
1
0
1
Bank A
Bank B
SY58024U Dual 2
2 Crosspoint Switch
4
Precision EdgeTM
SY58024U
Micrel
M9999-091404
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
Current (V
T
)
Source or Sink Current on VT pin ..................
100mA
Input Current (V
T
)
Source or Sink Current on IN, /IN .....................
50mA
Lead Temperature (soldering, 20 sec.) ..................... 260
C
Storage Temperature (T
S
) ........................... 65
C +150
C
Operating Ratings
(2)
Supply Voltage (V
CC
) ............................ +2.375V to +3.60V
Ambient Temperature (T
A
) ......................... 40
C to +85
C
Package Thermal Resistance
(3)
MLFTM
(
JA
)
Still-Air ............................................................. 35
C/W
500lfpm ............................................................ 28
C/W
MLFTM
(
JB
)
Junction-to-board resistance ........................... 20
C/W
T
A
= 40
C to +85
C.
Symbol
Parameter
Condition
Min
Typ
Max
Units
V
CC
Power Supply Voltage
2.5V nominal
2.375
2.5
2.625
V
3.3V nominal
3.0
3.3
3.60
V
I
CC
Power Supply Current
V
CC
= max., current through internal
200
250
mA
50
source termination resistor included.
V
IH
Input HIGH Voltage
IN, /IN; Note 5
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 Swing
IN, /IN, see Figure 1b.
0.2
V
R
IN
IN-to-V
T
Resistance
40
50
60
IN to V
T
1.28
V
DC ELECTRICAL CHARACTERISTICS
(4)
V
CC
= +3.3V
10% or +2.5V
5%; R
L
= 100
across each pair; 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
0.020
V
CC
V
V
OUT
Output Voltage Swing
Q0, /Q0; Q1, /Q1; see Figure 1a.
325
400
500
mV
V
DIFF_OUT
Differential Voltage Swing
Q0, /Q0; Q1, /Q1; see Figure 1b.
650
800
1000
mV
R
OUT
Output Source Impedance
Q0, /Q0; Q1, /Q1
40
50
60
Notes:
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 Ratlng" 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. Thermal performance assumes exposed pad is soldered (or equivalent) to the device's most negative potential (GND) on the PCB.
JA
and
JB
are
characterized for 4-layer boards in still air, unless otherwise stated.
4. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
5. V
IH
(min.) not lower than 1.2V.
CML OUTPUT DC ELECTRICAL CHARACTERISTICS
(4)
5
Precision EdgeTM
SY58024U
Micrel
M9999-091404
hbwhelp@micrel.com or (408) 955-1690
V
DIFF_IN
,
V
DIFF_OUT
(Typ. 800mV)
Figure 1b. Differential Voltage Swing
V
IN
,
V
OUT
Typ. 400mV
Figure 1a. Single-Ended Voltage Swing
SINGLE-ENDED AND DIFFERENTIAL SWINGS
V
CC
= +2.5V
5% or +3.3V
10%; R
L
= 100
across each output pair; T
A
= 40
C to +85
C, unless otherwise stated.
Symbol
Parameter
Condition
Min
Typ
Max
Units
f
MAX
Maximum Operating Frequency
V
IN
100mV; V
OUT
200mV
Clock
6
GHz
NRZ Data
10.7
Gbps
t
pd
Propagation Delay
IN-to-Q
200
350
ps
SEL-to-Q
100
400
ps
t
SKEW
Channel-to-Channel Skew
(Within Bank)
Note 7
20
ps
Part-to-Part Skew
Note 8
75
ps
t
JITTER
Clock
Cycle-to-Cycle Jitter
Note 9
1
ps
rms
Total Jitter
Note 10
10
ps
pp
Data
Random Jitter
Note 11
1
ps
rms
Deterministic Jitter
Note 12
10
ps
pp
Crosstalk Induced Jitter
Note 13
0.7
ps
rms
Adjacent Channel
t
r
, t
f
Output Rise/Fall Time
20% to 80% at full swing.
25
60
ps
Notes:
6. High frequency AC-parameters are guaranteed by design and characterization.
7. Skew is measured between outputs of the same bank under identical transitions.
8. 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.
9. 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.
10. 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.
11. Random jitter is measured with a K28.7 comma detect character pattern, measured at 2.5Gbps3.2Gbps.
11. Deterministic jitter is measured at 2.5Gbps3.2Gbps with both K28.5 and 2
23
1 PRBS pattern.
13. Crosstalk induced jitter is defined as the added jitter that results from signals applied to two adjacent channels. It is measured at the output while
applying similar, differential clock frequencies that are asynchronous with respect to each other at inputs.
AC ELECTRICAL CHARACTERISTICS
(6)
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