SY58606U
4.25Gbps Precision, 1:2 CML Fanout Buffer
with Internal Termination and Fail Safe Input
General Description
The SY58606U is a 2.5/3.3V, high-speed, fully
differential 1:2 CML fanout buffer optimized to provide
two identical output copies with less than 15ps of skew
and only 146fs
RMS
of phase jitter. The SY58606U can
process clock signals as fast as 3GHz or data patterns
up to 4.25Gbps.
The differential input includes Micrel’s unique, 3-pin
input termination architecture that interfaces to LVPECL,
LVDS or CML differential signals, (AC- or DC-coupled)
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 integrated
voltage reference (V
REF-AC
) is provided to bias the V
T
pin.
The outputs are 400mV CML, with extremely fast
rise/fall times guaranteed to be less than 85ps.
The SY58606U 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 or LVDS outputs,
consider Micrel’s SY58607U and SY58608U, 1:2 fanout
buffers with 800mV and 325mV output swings
respectively. The SY58606U is part of Micrel’s high-
speed, Precision Edge
®
product line.
Datasheets and support documentation can be found on
Micrel’s web site at:
Precision Edge
®
Features
•
Precision 1:2, 400mV CML fanout buffer
•
Ultra-low jitter design
– 146fs
RMS
phase jitter (typ)
•
Guaranteed AC performance over temperature and
voltage:
– DC-to > 4.25Gbps throughput
– <320ps propagation delay (IN-to-Q)
– <15ps within-device skew
– <85ps rise/fall times
•
Fail Safe Input
– Prevents outputs from oscillating when input is
invalid
•
High-speed CML outputs
•
2.5V ±5% or 3.3V ±10% power supply operation
•
Industrial temperature range: –40°C to +85°C
•
Available in 16-pin (3mm x 3mm) QFN package
Applications
•
•
•
•
Data Distribution: OC-48, OC-48+FEC, XAUI
SONET clock and data distribution
Fibre Channel clock and data distribution
Gigabit Ethernet clock and data distribution
Functional Block Diagram
Markets
•
•
•
•
•
•
•
Storage
ATE
Test and measurement
Enterprise networking equipment
High-end servers
Access
Metro area network equipment
Precision Edge is a registered 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
November 2011
M9999-110411-D
hbwhelp@micrel.com
or (408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
