SY89856U
2GHz, Low-Power, 1:6 LVPECL Fanout Buffer
with 2:1 Input MUX and Internal Termination
General Description
The SY89856U is a 2.5V/3.3V precision, high-speed, 1:6
fanout capable of handling clocks up to 2.0GHz. A
differential 2:1 MUX input is included for redundant clock
switchover applications.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the device to interface
to any differential signal (AC- or DC-coupled) as small as
100mV (200mVpp) without any level shifting or termination
resistor networks in the signal path. The outputs are
LVPECL (100k, temperature compensated), with
extremely fast rise/fall times guaranteed to be less than
200ps.
The SY89856U 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 SY89856U is
®
part of Micrel’s high-speed, Precision Edge product line.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
6 ultra-low skew copies of the selected input
2:1 MUX input included for clock switchover applications
Low power: 225mW typical (2.5V)
2.5V to 3.3V supply voltage
Unique input isolation design minimizes crosstalk
Guaranteed AC performance over temperature and
voltage:
Clock frequency range: DC to >2.0GHz
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