SY55859L
3.3V, 3.2Gbps Dual 2X2 Crosspoint Switch
General Description
The SY55859L is a dual CML 2x2 crosspoint switch
SuperLite
TM
optimized for high-speed data and/or clock applications
Features
(up to 3.2Gbps or 2.7GHz) where low jitter and skew are
•
Pin-for-pin, plug-in compatible to the MAX3840
critical. This device is pin-for-pin, plug-in compatible to the
MAX3840. Each 2x2 of the SY55859L routes any input to
•
Supply voltage operation: +3.3V±10%
any output, and thus can distribute or multiplex a clock or
•
Low Jitter:
data stream. The I/O architecture is fully differential and
-2ps
RMS
random jitter
CML compatible. Both inputs and outputs are optimized for
-5ps
PP
deterministic jitter
50 transmission lines. The inputs
(DA 0-1 and DB 0-1)
•
Power saving output disable feature
are internally terminated with 50, thus eliminating
•
15ps channel-to-channel skew
external termination, and the outputs (QA0-1 and QB0-1)
include 50 source termination. Furthermore, a power-
•
Fast CML outputs: <100ps t
r
/t
f
saving output enable feature is provided which powers-
•
Available in a small (5mm x 5mm) 32-pin EPAD-QFN
down unused outputs.
package
The SY5859L operates from a +3.3V ±10% supply, and is
guaranteed over the industrial (–40°C to +85°C)
Applications
temperature range. It is available in a 32-pin (5mm x
5mm) QFN package.
•
SONET/SDH optical transport
For applications that require either lower voltage operation
•
High-speed backplane redundancy
or a more flexible input interface (for applications such as
•
Add-drop multiplexers
AC–coupled LVPECL inputs), consider the SY55858U.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Applications
Typical Performance
SuperLite is a trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
January 2010
M9999-012110-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY55859L
Ordering Information
(1)
Part Number
SY55859LMI
SY55859LMITR
SY55859LMG
(3)
(2)
Package Type
H32-1
H32-1
H32-1
H32-1
Operating Range
Industrial
Industrial
Industrial
Industrial
Package Marking
SY55859LMI
SY55859LMI
SY55859LMG with Pb-Free
bar-line indicator
SY55859LMG with Pb-Free
bar-line indicator
Lead Finish
Sn-Pb
Sn-Pb
Pb-Free
NiPdAu
Pb-Free
NiPdAu
SY55859LMGTR
Notes:
(2,3)
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC Electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
Cross Reference Table
Micrel Semiconductor
SY55859LMI
Maxim
MAX3840EGJ
Pin Configuration
32-Pin EPAD-QFN
January 2010
2
M9999-012110-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY55859L
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9, 24
10, 13, 16, 17,
20, 23
11
12
14
15
18
19
21
22
25
26
27
28
29
30
31
32
EP
Pin Name
ENB1
DB1
/DB1
ENB0
SELB0
DB0
/DB0
SELB1
GND
VCC
/QB0
QB0
/QB1
QB1
/QA1
QA1
/QA0
QA0
SELA1
DA0
/DA0
SELA0
ENA0
DA1
/DA1
ENA1
Exposed Pad
Pin Function
TTL Input. Channel B1 Output Enable. Setting this pin inactive low powers down
QB1 and /QB1. Do not leave floating.
CML Input. Channel B1 true input.
CML Input. Channel B1 complement input.
TTL Input. Channel B0 Output Enable. Setting this pin inactive low powers down
QB0 and /QB. Do not leave floating.
TTL Input. Channel B0 output select. Please refer to Table 2. Do not leave
floating.
CML Input. Channel B0 true input.
CML Input. Channel B0 complement input.
TTL Input. Channel B1 output select. Please refer to Table 2. Do not leave
floating.
Supply ground. Most negative supply voltage.
Positive Supply.
CML Output. Channel B0 complement output.
CML Output. Channel B0 true output.
CML Output. Channel B1 complement output.
CML Output. Channel B1 true output.
CML Output. Channel A1 complement output.
CML Output. Channel A1 true output.
CML Output. Channel A0 complement output.
CML Output. Channel A0 true output.
TTL Input. Channel A1 output select. Please refer to Table 1. Do not leave
floating.
CML Input. Channel A0 true input.
CML Input. Channel A0 complement input.
TTL Input. Channel A0 output select. Please refer to Table 1. Do not leave
floating.
TTL Input. Channel A0 output enable. Setting this pin inactive low powers down
QA0 and /QA0. Do not leave floating.
CML Input. Channel A1 true input.
CML Input. Channel A1 complement input.
TTL Input. Channel A1 output enable. Setting this pin inactive low powers down
QA1 and / QA1. Do not leave floating.
Ground. This must be soldered to circuit board ground for proper electrical and
thermal operation.
January 2010
3
M9999-012110-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY55859L
Absolute Maximum Ratings
(1)
Supply Voltage (V
CC
) ..................................... -0.5V to +6.0V
CML Input Voltage (V
IN
). ............................... -0.5V to +6.0V
TTL Control Input Voltage (V
IN
). ............. -0.5V to V
CC
+0.5V
CML Output Voltage (V
OUT
) ............. V
CC
-1.0V to V
CC
+0.5V
CML Output Current (I
OUT
) .......................................... 22mA
Lead Temperature (soldering, 20sec.) ..................... +260°C
Storage Temperature (T
S
) ......................... –65°C to +150°C
Operating Ratings
(2)
Supply Voltage (V
CC
).................................. +3.0 to +3.6V
Ambient Temperature (T
A
) ..................... –40°C to +85°C
Junction Temperature (T
J
) .................................... 160°C
Package Thermal Resistance
QFN
(θ
JA
)
Still-air……………………………………....28°C/W
500lfpm……………………………………..20°C/W
QFN
(θ
JC
)………………………………………4°C/W
DC Electrical Characteristics
T
A
= –40°C to +85°C.
Symbol
V
CC
I
CC
Parameter
Power Supply Voltage
Power Supply Current
No Load, Over Supply Voltage; All
Outputs Enabled
Condition
Min
3.0
Typ
3.3
160
Max
3.6
190
Units
V
mA
CML DC Electrical Characteristics
V
CC
= 3.0V to 3.6V; GND = 0V; T
A
= –40°C to +85°C
Symbol
V
OUT
R
OUT
V
OCM
V
IS
V
DIFF
Parameter
CML Differential Output Swing
Differential Output Impedance
CML Output Common Mode
Voltage
CML Input Voltage Range
CML Differential Input Voltage
Swing
CML Single-ended Input
Impedance
(Note 3)
Condition
R
L
= 50Ω to V
CC
, Figure 3
Figure 2
R
L
= 50Ω
to V
CC
, Figure 3
Figure 4
Figure 5
Figure 1
Min
640
85
Typ
800
100
V
CC
-0.2
Max
1000
115
Units
mV
PP
Ω
V
V
CC
-0.8
300
42.5
50
V
CC
+0.4
1600
57.5
V
mV
PP
Ω
TTL Control Electrical Characteristics
V
CC
= 3.0V to 3.6V; GND = 0V; T
A
= –40°C to +85°C
Symbol
V
IH
V
IL
I
IH
I
IL
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 rating conditions for extended
periods may affect reliability.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. The device is guaranteed to meet the DC specifications, shown in the table above, after thermal equilibrium has been established. The device is
tested in a socket such that transverse airflow of
≥500lfpm
is maintained.
(Note 3)
Parameter
TTL Input HIGH Voltage
TTL Input LOW Voltage
TTL Input HIGH Current
TTL Input LOW Current
Condition
Min
2.0
Typ
Max
0.8
Units
V
V
µA
µA
-10
-10
+10
+10
January 2010
4
M9999-012110-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY55859L
AC Electrical Characteristics
V
CC
= 3.0V to 3.6V; GND = 0V; T
A
= –40°C to +85°C
Symbol
f
MAX
f
MAX
t
PD
R
J
D
J
t
SKDIFF
t
SKEW
t
r
, t
f
Notes:
1. AC characteristics are guaranteed by design and characterization. Tested using environment of Figure 6, 50Ω
equivalent load.
2. Measured with 100mVp-p noise (f
≤
2MHz) on the power supply.
3. Deterministic jitter (D
J
) is the arithmetic sum of pattern-dependent jitter pulse width distortion.
4. This represents the skew on a QA and QB output with their inputs receiving the same signal.
(Note 1)
Parameter
Maximum NRZ Data Rate
Maximum Clock Rate
Propagation Delay from
Input-to-Output
Random Jitter
Deterministic Jitter
CML Output Differential Skew
CML Output Channel-to-Channel
CML Output Rise/Fall Times
Condition
Min
Typ
3.2
2.7
275
Max
Units
Gbps
GHz
ps
ps
RMS
Note 2
Note 3
Any Differential Pair- Duty Cycle
Distortion
Note 4,
Any Two Outputs
(20% to 80%)
2
5
7
15
80
20
25
40
135
ps
PP
ps
ps
ps
January 2010
5
M9999-012110-A
hbwhelp@micrel.com
or (408) 955-1690
