SY55856U Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 2.5V/3.3V 2.5GHz DIFFERENTIAL 2-CHANNEL PRECISION CML DELAY LINE

Micrel, Inc.
2.5V/3.3V 2.5GHz
DIFFERENTIAL 2-CHANNEL
PRECISION CML DELAY LINE
SuperLite™
Super^SL^Yit⁵e⁵™^856U
SY55856U
FEATURES
s Guaranteed AC parameters over temp and voltage
• > 2.5GHz f_MAX
• < 384ps prop delay
• < 120ps t_r/t_f
s Delay either clock or data
s 50ps increments
s ± 350ps total delay
s Source terminated CML outputs
s Full differential I/O
s Wide supply voltage spectrum: 2.3V to 3.6V
s Available in a tiny 32-pin EPAD-TQFP package
APPLICATIONS
s Data communications systems
s Telecom systems
s High-speed backplanes
s Signal de-skewing
s Pulse alignment
s Digitally controlled delay lines
SuperLite™
DESCRIPTION
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 single-
ended or differential CML signals. The differential CML
outputs are optimized for 50Ω loads (50Ω source terminated),
thus only requires a single 100Ω 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.
M9999-011207
[e-mail] or [phone]
1
Rev.: E Amendment: /0
Issue Date: January 2007