ULTRA-PRECISION DIFFERENTIAL CML 2:1 MUX
Description
Micrel, Inc.
ULTRA-PRECISION DIFFERENTIAL CML 2:1 MUX with INTERNAL I/O TERMINATION
Precision Edge®
Precision ESdY5g8e0®17U
SY58017U
FEATURES
■ Guaranteed AC performance over temperature and voltage:
• DC to > 10.
7Gbps data throughput • DC to > 7GHz fMAX (clock) • < 240ps propagation delay • < 60ps tr / tf times ■ Ultra-low crosstalk-induced jitter: < 0.
7psrms ■ Ultra-low jitter design: • < 1psRMS random jitter • < 10psPP deterministic jitter • < 10psPP total jitter (clock) ■ Unique input termination and VT pin accepts DCcoupled and AC-coupled inputs (CML, PECL, LVDS)
■ Internal 50Ω output source termination ■ Typical 400mV CML output swing (RL = 50Ω) ■ Power supply 2.
5V ±5% or 3.
3V ±10% ■ –40°C to +85°C temperature range ■ Available in 16-pin (3mm × 3mm) MLF® package
APPLICATIONS
■ Redundant clock distribution
■ OC-3 to OC-192 SONET/SDH clock/data distribution
■ Loopback
■ Fibre Channel distribution
Precision Edge®
DESCRIPTION
The SY58017U is a 2.
5V/3.
3V precision, high-speed, 2:1 differential MUX capable of handling clocks up to 7GHz and data up to 10.
7Gbps.
The differential input includes Micrel’s unique, 3-pin input termination architecture that allows customers to interface to any differential signal (AC- or DC-coupled) as small as 100mV without any level shifting or termination resistor networks in the signal path.
The outputs are 50Ω source terminated CML, with extremely fast rise/fall times guaranteed to be less than 60ps.
The SY58017U 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.
For applications that require LVPECL outputs, consider the SY58018U or SY58019U Multiplexers with LVPECL outputs.
The SY58017U 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.
FUNCTIONAL BLOCK DIAGRAM
IN0 50Ω
VT0 50Ω
/IN0
IN1 50Ω
VT1 50Ω
/IN1
SEL (TTL/CMOS)
0 MUX
1S
Output Swing (100mV/div.
)
TYP...
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