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Micrel Semiconductor

SY58011U Datasheet Preview

SY58011U Datasheet

1:2 CML FANOUT BUFFER/TRANSLATOR

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Micrel, Inc.
www.DataSheet4U.com
7GHz, 1:2 CML FANOUT
BUFFER/TRANSLATOR WITH
INTERNAL I/O TERMINATION
Precision ESYd5g8e01®1U
SY58011U
FEATURES
Precision 1:2, 400mV CML fanout buffer
Guaranteed AC performance over temperature/
voltage:
• > 7GHz fMAX clock
• < 60ps tr / tf times
• < 250ps tpd
• < 15ps max. skew
Low jitter performance:
• < 10psPP total jitter (clock)
• < 1psRMS random jitter (data)
• < 10psPP deterministic jitter (data)
Accepts an input signal as low as 100mV
Unique input termination and VT pin accepts DC-
coupled and AC-coupled differential
inputs: LVPECL, LVDS, and CML
50source terminated CML outputs
Power supply 2.5V ±5% and 3.3V ±10%
Industrial temperature range: –40°C to +85°C
Available in 16-pin (3mm × 3mm) MLF® package
APPLICATIONS
s All SONET and 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
FUNCTIONAL BLOCK DIAGRAM
Precision Edge®
DESCRIPTION
The SY58011U is a 2.5V/3.3V precision, high-speed, fully
differential 1:2 CML fanout buffer. Optimized to provide two
identical output copies with less than 15ps of skew and less
than 10ps(pk-pk) total jitter, the SY58011U can process clock
signals as fast as 7GHz or data patterns up to 10.7Gbps.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that interfaces to LVPECL, LVDS,
or 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
(VREF-AC) is provided to bias the VT pin. The outputs are
compatible with 400mV typical swing into 50loads, with
extremely fast rise/fall times guaranteed to be less than
60ps.
The SY58011U 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 LVPECL outputs, consider the SY58012U or
SY58013U 1:2 fanout buffer with 800mV and 400mV output
swing, respectively. The SY58011U is part of Micrel’s high-
speed, Precision Edge™ product line. Data sheets and
support documentation can be found on Micrel’s web site at
www.micrel.com.
TYPICAL PERFORMANCE
2GHz Output
VCC = 2.5V
IN
50
VT
50
/IN
VREF-AC
Q0
/Q0
Q1
/Q1
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
1
TIME (70ps/div.)
2GHz with 100mV Input
Rev.: D Amendment: /0
Issue Date: February 2007




Micrel Semiconductor

SY58011U Datasheet Preview

SY58011U Datasheet

1:2 CML FANOUT BUFFER/TRANSLATOR

No Preview Available !

Micrel, Inc.
SY58011U
PACKAGE/ORDERING INFORMATION
IN
VT
VREF-AC
/IN
16 15 14 13
1 12
2 11
3 10
49
5678
Q0
/Q0
/Q1
Q1
16-Pin MLF® (MLF-16)
Ordering Information(1)
Part Number
SY58011UMI
SY58011UMITR(2)
SY58011UMG(3)
Package
Type
MLF-16
MLF-16
MLF-16
SY58011UMGTR(2, 3) MLF-16
Operating
Range
Industrial
Industrial
Industrial
Industrial
Package
Marking
011U
011U
011U with
Pb-Free bar-line indicator
011U with
Pb-Free bar-line indicator
Lead
Finish
Sn-Pb
Sn-Pb
Pb-Free
NiPdAu
Pb-Free
NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
1, 4
2
3
5, 8, 13, 16
6, 7, 14, 15
12, 11
9, 10
Pin Name
IN, /IN
VT
VREF-AC
VCC
GND,
(Exposed Pad)
Q0, /Q0,
Q1, /Q1
Pin Function
Differential Input: This input pair is the signal to be buffered. Each pin of this pair internally
terminates with 50to the VT pin. Note that this input will default to an indeterminate state
if left open. See Input Interface Applicationssection.
Input Termination Center-Tap: Each input terminates to this pin. The VT pin provides a
center-tap for each input (IN, /IN) to a termination network for maximum interface flexibility.
See Input Interface Applicationssection.
Reference Output Voltage: This output biases to VCC 1.2V. It is used when AC-coupling
the inputs (IN, /IN). Connect VREF-AC directly to the VT pin. Bypass with 0.01µF low ESR
capacitor to VCC. Maximum current source or sink is 0.5mA. See Input Interface Applica
tionssection.
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the
VCC pins as possible.
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 output copy of the input signal. The
output swing is typically 400mV. Unused output pairs may be left floating with no impact on
jitter. See CML Output Terminationsection.
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
2


Part Number SY58011U
Description 1:2 CML FANOUT BUFFER/TRANSLATOR
Maker Micrel Semiconductor
Total Page 9 Pages
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