SY58606U_11 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 4.25Gbps Precision, 1:2 CML Fanout Buffer

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: www.micrel.com.
Functional Block Diagram
Features
Precision Edge^®
• 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
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 [phone] • fax + 1 [phone] • http://www.micrel.com
November 2011
M9999-110411-D
[e-mail] or [phone]