SY898535XL Datasheet, PDF (1/7 Pages) Micrel Semiconductor – Precision Differential 3.3V, Low Skew

SY898535XL
Precision Differential 3.3V, Low Skew, 1:4
Crystal Oscillator/LVCMOS/LVTTL -to-
LVPECL Fanout Buffer
General Description
The SY898535XL is a 3.3V, low skew, 1:4 Crystal
Oscillator/LVCMOS/LVTTL-to-LVPECL fanout buffer with
selectable single ended clock or crystal inputs. The clock
input accepts LVCMOS or LVTTL input levels and
translate them to 3.3V LVPECL levels. To eliminate runt
pulses on the outputs during asynchronous assertion/de-
assertion of the clock enable pin, the clock enable is
synchronized with the input signal.
The SY898535XL operates from a 3.3V ±5% supply and is
guaranteed over the full industrial temperature range of
–40°C to +85°C. The SY898535XL 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
• Provides four differential 3.3V LVPECL copies
• Selects between single-ended CLK or crystal inputs
• CLK accepts LVCMOS or LVTTL input levels
• Guaranteed AC performance over temperature and
supply voltage:
235MHz Maximum output frequency
<1.65ns Propagation delay (In-to-Q)
<30ps Output skew
<200ps Part-to-part skew
Additive phase jitter, RMS: 0.09ps (typical)
• 3.3V ±5% supply voltage
• –40°C to +85°C industrial temperature operating range
• Available in a 20-pin TSSOP package
Applications
• Gigabit Ethernet
• 10Gigabit Ethernet
• SONET/SDH
• PCI
Markets
• LAN/WAN
• Enterprise servers
• ATE
• Test and measurement
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
June 2011
M9999-062211-B
[e-mail] or [phone]