Micrel
2.5V/3.3V 1.5GHz PRECISION
LVPECL PROGRAMMABLE DELAY
Precision Edge™
SY89295U
Precision Edge™
SY89295U
FEATURES
s
Precision LVPECL programmable delay line
s
Guaranteed AC performance over temperature and
voltage:
•
> 1.5GHz f
MAX
•
< 160ps rise/fall times
s
Low-jitter design:
•
< 10ps
pp
total jitter
•
< 2ps
rms
cycle-to-cycle jitter
•
< 1ps
rms
random jitter
s
Programmable delay range: 3.2ns to 14.8ns in 10ps
increments
s
Increased monotonicity over the MIC100EP195
s
±
10% of LSB INL
s
V
BB
output reference voltage
s
Parallel inputs accepts LVPECL or CMOS/LVTTL
s
Low voltage operation: 2.5V
±
5% and 3.3V
±
10%
s
Industrial –40
°
C to +85
°
C temperature range
s
Available in 32-pin (5mm
×
5mm) MLF™ and 32-pin
TQFP packages
Precision Edge™
DESCRIPTION
The SY89295U is a programmable delay line that delays
the input signal using a digital control signal. The delay can
vary from 3.2ns to 14.8ns in 10ps increments. In addition,
the input signal is LVPECL, uses either a 2.5V
±5%
or 3.3V
±10%
power supply, and is guaranteed over the full industrial
temperature range (–40°C to +85°C).
The delay varies in discrete steps based on a control
word. The control word is 10-bits long and controls the
delay in 10ps increments. The eleventh bit is D[10] and is
used to simultaneously cascade the SY89295U which allows
for a larger delay range. In addition, the input pins IN and
/IN default to an equivalent low state when left floating.
Further, for maximum flexibility, the control register interface
accepts CMOS or TTL level signals.
For applications that requires an analog delay input, see
the SY89296L which is a programmable delay chip with
fine tune control. The SY89295U and SY89296U are part
of Micrel’s high-speed, Precision Edge™ product line.
All support documentation can be found on Micrel’s
website at www.micrel.com.
APPLICATIONS
s
Clock de-skewing
s
Timing adjustments
s
Aperture centering
Precision Edge is a trademark of Micrel, Inc.
Micro
LeadFrame and MLF are trademarks of Amkor Technology, Inc.
M9999-031604
hbwhelp@micrel.com or (408) 955-1690
Rev.: A
Amendment: /0
1
Issue Date: March 2004
MICREL [ MICREL SEMICONDUCTOR ]
