SY56034AR
Low Voltage 1.2V/1.8V/2.5V 2:6 MUX with
Crosspoint Capability 5GHz/6.4Gbps
General Description
The SY56034AR is a fully differential, low voltage
1.2V/1.8V/2.5V CML 2:6 (2+4) MUX with crosspoint
capability. The SY56034AR can process clock signals
as fast as 5GHz or data patterns up to 6.4Gbps.
The differential input includes Micrel’s unique, 3-pin
input termination architecture that interfaces to
LVPECL, LVDS or CML differential signals as small
as 100mV (200mV
pp
) without any level-shifting or
termination resistor networks in the signal path. For
AC-coupled input interface applications, an internal
voltage reference is provided to bias the V
T
pin. The
outputs are 400mV CML, with extremely fast rise/fall
times guaranteed to be less than 80ps.
The SY56034AR operates from a 2.5V ±5% core
supply and a 1.2V/1.8V/2.5V ±5% output supply and
is guaranteed over the full industrial temperature
range (–40°C to +85°C). The SY56034AR 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.
Precision Edge
®
Features
•
1.2V/1.8V/2.5V CML 2:6 (2+4) MUX with Crosspoint
Capability
•
Guaranteed AC performance over temperature and
voltage:
– DC-to- > 6.4Gbps throughput
– <300ps propagation delay (IN-to-Q)
– <25ps Output skew
– <80ps rise/fall times
•
Ultra-low jitter design
– <1ps
RMS
cycle-to-cycle jitter
– <10ps
PP
total jitter
– <1ps
RMS
random jitter
– <10ps
PP
deterministic jitter
•
High-speed CML outputs
•
2.5V ±5% , 1.2V/1.8V/2.5V ±5% power supply
operation
•
Industrial temperature range: –40°C to +85°C
•
Available in 32-pin QFN package
Functional Block Diagram
Applications
•
•
•
•
Data Distribution: OC-48, OC-48+FEC
SONET clock and data distribution
Fibre Channel clock and data distribution
Gigabit Ethernet clock and data distribution
Markets
•
•
•
•
•
•
•
Precision Edge is a registered trademark of Micrel, Inc.
Storage
ATE
Test and measurement
Enterprise networking equipment
High-end servers
Access
Metro area network equipment
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2008
M9999-093008-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY56034AR
Ordering Information
(1)
Part Number
SY56034ARMG
SY56034ARMGTR
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A
= 25°C, DC Electricals only.
2. Tape and Reel.
(2)
Package
Type
QFN-32
QFN-32
Operating
Range
Industrial
Industrial
Package Marking
56034AR with Pb-Free
bar-line indicator
56034AR with Pb-Free
bar-line indicator
Lead
Finish
NiPdAu
Pb-Free
NiPdAu
Pb-Free
Pin Configuration
32-Pin QFN
Truth Table
SEL0
L
L
H
H
SEL1
L
H
L
H
Bank1
IN0
IN0
IN1
IN1
Bank2
IN0
IN1
IN0
IN1
September 2008
2
M9999-093008-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY56034AR
Pin Description
Pin Number
2,3
6,7
1
8
Pin Name
IN0, /IN0
IN1,/IN1
VT0
VT1
Pin Function
Differential Inputs: These input pairs are the differential signal inputs to the device.
They accept differential signals as small as 100mV (200mV
PP
). Each input pin
internally terminates with 50Ω
to the VT pin.
Input Termination Center-Tap: Each side of the differential input pair terminates to a
VT pin. This pin provides a center-tap to a termination network for maximum
interface flexibility. An internal high impedance resistor divider biases VT to allow
input AC-coupling. For AC-coupling, bypass VT with a 0.1µF low ESR capacitor to
VCC. See “Interface Applications” subsection and Figure 2a.
These single-ended TTL/CMOS-compatible inputs select the inputs to the
crosspoint switch. Note that each of these inputs is internally connected to a 25kΩ
pull-up resistor and will default to a logic HIGH state if left open.
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to
the V
CC
pin as possible. Supplies input and core circuitry.
Output Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the V
CCO
pins as possible. Supplies the output buffer.
Ground: Exposed pad must be connected to a ground plane that is the same
potential as the ground pin.
CML Differential Output Pairs: Differential buffered copy of the selected input signal.
The output swing is typically 390mV. See “Interface Applications” subsection for
termination information. Output pairs Q0 to Q3 belong to Bank 1. Q4 and Q5 belong
to Bank 2.
4
5
10, 31
11,16,18,
23,25,30
9,17,24,32
29,28
27,26
22,21
20,19
15,14
13,12
SEL0
SEL1
VCC
VCCO
GND,
Exposed pad
Q0, /Q0
Q1, /Q1
Q2, /Q2
Q3, /Q3
Q4, /Q4
Q5, /Q5
September 2008
3
M9999-093008-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY56034AR
Absolute Maximum Ratings
(1)
Supply Voltage (V
CC
) ............................... –0.5V to +3.0V
Supply Voltage (V
CCO
) ............................. –0.5V to +2.7V
V
CC
- V
CCO
............................................................... <1.8V
V
CCO
- V
CC
............................................................... <0.5V
Input Voltage (V
IN
) ............................ –0.5V to V
CC
+ 0.5V
CML Output Voltage (V
OUT
) ............... 0.6V to V
CCO
+0.5V
Current (V
T
)
Source or sink current on VT pin ................. ±100mA
Input Current
Source or sink current on (IN, /IN) ................. ±50mA
Maximum operating Junction Temperature .......... 125°C
Lead Temperature (soldering, 20sec.) .................. 260°C
Storage Temperature (T
s
) .................... –65°C to +150°C
Operating Ratings
(2)
Supply Voltage (V
CC
) .......................... 2.375V to 2.625V
(V
CCO
) .......................... 1.14V to 2.625V
Ambient Temperature (T
A
) ................... –40°C to +85°C
(3)
Package Thermal Resistance
QFN
Still-air (θ
JA
) ............................................ 50°C/W
Junction-to-board (ψ
JB
) ......................... 20°C/W
DC Electrical Characteristics
(4)
T
A
= –40°C to +85°C, unless otherwise stated.
Symbol
V
CC
Parameter
Power Supply Voltage Range
Condition
V
CC
V
CCO
V
CCO
V
CCO
Max. V
CC
No Load. Max V
CCO
45
90
IN, /IN
V
IL
with V
IH
= 1.2V
IN, /IN
V
IL
with V
IH
= 1.14V (1.2V-5%)
see Figure 3a
see Figure 3b
1.2
0.2
1.14
0.66
0.1
0.2
Min
2.375
1.14
1.7
2.375
Typ
2.5
1.2
1.8
2.5
100
96
50
100
Max
2.625
1.26
1.9
2.625
140
126
55
110
V
CC
V
IH
–0.1
V
CC
V
IH
–0.1
1.0
2.0
1.28
Units
V
V
V
V
mA
mA
Ω
Ω
V
V
V
V
V
V
V
I
CC
I
CCO
R
IN
R
DIFF_IN
V
IH
V
IL
V
IH
V
IL
V
IN
V
DIFF_IN
V
T_IN
Notes:
Power Supply Current
Power Supply Current
Input Resistance
(IN-to-V
T
, /IN-to-V
T
)
Differential Input Resistance
(IN-to-/IN)
Input HIGH Voltage
(IN, /IN)
Input LOW Voltage
(IN, /IN)
Input HIGH Voltage
(IN, /IN)
Input LOW Voltage
(IN, /IN)
Input Voltage Swing
(IN, /IN)
Differential Input Voltage Swing
(|IN - /IN|)
Voltage from Input to V
T
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.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB.
ψ
JB
and
θ
JA
values are determined for a 4-layer board in still-air number, unless otherwise stated. The circuit is designed to meet the DC specifications shown
in the above table after thermal equilibrium has been established.
4. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
September 2008
4
M9999-093008-A
hbwhelp@micrel.com
or (408) 955-1690
Micrel, Inc.
SY56034AR
CML Outputs DC Electrical Characteristics
(5)
V
CCO
= 1.14V to 1.26V, R
L
= 50Ω
to V
CCO,
V
CCO
= 1.7V to 1.9V, 2.375V to 2.625V, R
L
= 50Ω
to V
CCO
or 100Ω across the outputs.
V
CC
= 2.375V to 2.625V. T
A
= –40°C to +85°C, unless otherwise stated.
Symbol
V
OH
V
OUT
V
DIFF_OUT
R
OUT
Parameter
Output HIGH Voltage
Output Voltage Swing
Differential Output Voltage Swing
Output Source Impedance
Condition
R
L
= 50Ω
to V
CCO
See Figure 3a
See Figure 3b
Min
V
CCO
-0.020
300
600
45
Typ
V
CCO
-0.010
390
780
50
Max
V
CCO
475
950
55
Units
V
mV
mV
Ω
LVTTL/CMOS DC Electrical Characteristics
(5)
V
CC
= 2.5V ±5%. T
A
= –40°C to +85°C, unless otherwise stated.
Symbol
V
IH
V
IL
I
IH
I
IL
Note:
5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
Parameter
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Condition
Min
2.0
-125
-300
Typ
Max
V
CC
0.8
30
Units
V
V
µA
µA
September 2008
5
M9999-093008-A
hbwhelp@micrel.com
or (408) 955-1690
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