SY89852U Datasheet, PDF (1/13 Pages) Micrel Semiconductor – Precision Low Power Differential 2:1 LVPECL MUX with Internal Termination

SY89852U
Precision Low Power Differential 2:1
LVPECL MUX with Internal Termination
General Description
The SY89852U is a 2.5V/3.3V precision, high-
speed, 2:1 differential MUX capable of handling
clocks up to 2.5GHz and data streams up to
2.5Gbps.
The differential input includes Micrel’s unique, patent
pending 3-pin input termination architecture that
allows users to interface to any differential signal
(AC- or DC-coupled) as small as 100mV (200mV_pp)
without any level shifting or termination resistor
networks in the signal path. The unique, patent input
isolation design minimizes crosstalk minimizing
crosstalk induced jitter. The outputs are 800mV
LVPECL, with extremely fast rise/fall time
guaranteed to be less than 180ps.
The SY89852U operates from a 2.5V ±5% supply or
a 3.3V ±10% supply and is guaranteed over the full
industrial temperature range of –40°C to +85°C.
The SY89852U is part of Micrel’s high-speed,
Precision Edge^® product line. All support
documentation can be found on Micrel’s web site at:
www.micrel.com.
Typical Applications
Features
Precision Edge^®
• Provides a low jitter copy of the selected input
• Superior alternative to the EP58 2:1 MUX
• Low power: 58mW (2.5V nominal, no load)
• Guaranteed AC performance over temperature
and supply voltage:
– DC- to > 2.5Gbps data rate throughput
– DC- to > 2.5GHz clock f_MAX
– < 340ps In-to-Out t_pd
– < 180ps t_r/t_f time
• Ultra-low Jitter Design:
– <1ps_(rms) random jitter
– <10ps_(pp) deterministic jitter
– <10ps_(pp) total jitter (clock)
– <0.7ps_(rms) crosstalk induced jitter
• Unique, patent-pending input isolation design
minimizes crosstalk
• Unique, patent pending input termination and VT
pin accepts DC-coupled and AC-coupled inputs
(CML, PECL, LVDS)
• Typical 800mV (100k) LVPECL output swing
• Power supply 2.5V +5% or 3.3V +10%
• Industrial temperature range –40^oC to +85^oC
• Available in ultra-small (3mm x 3mm) 16-pin MLF^®
package
Applications
• Redundant clock distribution
• SONET/SDH clock/data distribution
• Loopback
• Fibre Channel distribution
Markets
• LAN/WAN
• Enterprise servers
• ATE
• Test and measurement
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
February 2007
M9999-021307-B
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