SY58604U_11 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 3.2Gbps Precision, LVPECL Buffer

SY58604U
3.2Gbps Precision, LVPECL Buffer with
Internal Termination and Fail Safe Input
General Description
The SY58604U is a 2.5/3.3V, high-speed, fully
differential LVPECL buffer optimized to provide only
108fs_RMS phase jitter. The SY58604U can process clock
signals as fast as 2.5GHz or data patterns up to
3.2Gbps.
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 output is 800mV LVPECL, with extremely fast
rise/fall times guaranteed to be less than 110ps.
The SY58604U 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 CML or LVDS outputs, consider
the SY58603U and the SY58605U, buffers with 400mV
and 325mV output swings respectively. The SY58604U
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 800mV LVPECL buffer
• Ultra-low jitter design
– 108fs_RMS phase jitter
• Guaranteed AC performance over temperature and
voltage:
– DC-to > 3.2Gbps throughput
– <350ps typical propagation delay (IN-to-Q)
– <110ps rise/fall times
• Fail Safe Input
– Prevents output from oscillating when input is
invalid
• High-speed LVPECL output
• 2.5V ±5% or 3.3V ±10% power supply operation
• Industrial temperature range: –40°C to +85°C
• Available in 8-pin (2mm x 2mm) DFN package
Applications
• All SONET clock and data distribution
• Fibre Channel clock and data distribution
• Gigabit Ethernet clock and data distribution
• Backplane 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
September 2011
M9999-092911-D
[e-mail] or [phone]