SY55856U 2.5V/3.3V 2.5GHz Differential 2-Channel Precision CML Delay Line0 pages

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SuperLite™
Micrel, Inc. SY55856U
M9999-021908
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
¡ Guaranteed AC parameters over temp and voltage
• > 2.5GHz fMAX
• < 384ps prop delay
• < 120ps tr/tf
¡ Delay either clock or data
¡ 50ps increments
¡ ± 350ps total delay
¡ Source terminated CML outputs
¡ Full differential I/O
¡ Wide supply voltage spectrum: 2.3V to 3.6V
¡ Available in a tiny 32-pin EPAD-TQFP package
FEATURES
2.5V/3.3V 2.5GHz
DIFFERENTIAL 2-CHANNEL
PRECISION CML DELAY LINE
SuperLite™
SY55856U
APPLICATIONS
¡ Data communications systems
¡ Telecom systems
¡ High-speed backplanes
¡ Signal de-skewing
¡ Pulse alignment
¡ Digitally controlled delay lines
Rev.: F Amendment: /0
Issue Date: February 2008
The SY55856U is a 2.5GHz, two-channel, fully differential
CML (Current Mode Logic) delay line. The device is
optimized to adjust the relative delay between two channels,
such as clock and data, in 50ps increments. Both inputs
may be adjusted in either direction in 7 increments of 50ps,
for a total adjustment range of ±350ps. In addition, the
clock input maybe inverted through the CINV control pin.
The SY55856U inputs are designed to accept singleended
or differential CML signals. The differential CML
outputs are optimized for 50Ù loads (50Ù source terminated),
thus only requires a single 100Ù resistor across the output
pair. Output rise and fall time is an extremely fast 110ps(max)
and the differential swing is 400mV. The maximum
throughput of the SY55856U is guaranteed to exceed
2.5GHz (5Gbps).
SuperLite is a trademarks of Micrel, Inc.
SuperLite™