下载
SY89296U
2.5V/3.3V 1.5GHz Precision
LVPECL Programmable Delay
with Fine Tune Control
Precision Edge
®
Precision Edge is a registered trademark of Micrel, Inc
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
November 2011
M9999-112211
hbwhelp@micrel.com
or (408) 955-1690
General Description
The SY89296U 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. Further,
the delay may be varied continuously in about 40ps range
by setting the voltage at the FTUNE pin. 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 SY89296U 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 do not require an analog delay input,
see the SY89295U. The SY89295U and SY89296U are
part of Micrel’s high-speed, Precision Edge
®
product line.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com
.
Precision Edge
®
Features
• Precision LVPECL programmable delay time
• Guaranteed AC performance over temperature and
voltage:
− >1.5GHz f
MAX
− <160ps rise/fall times
• Low jitter design:
− <10ps
PP
total jitter
− <2ps
RMS
cycle-to-cycle jitter
− <1ps
RMS
random jitter
• Programmable delay range: 3.2ns to 14.8ns in 10ps
increments
• Increased monotonicity over the MC100EP195
• ±10ps INL
• VBB output reference voltage
• Parallel inputs accept LVPECL or CMOS/LVTTL
• 40ps/V fine tune range
• Low voltage operation: 2.5V ±5% and 3.3V ±10%
• Industrial −40°C to +85°C temperature range
• Available in 32-pin (5mm × 5mm) MLF
®
package or
32-pin TQFP package
Applications
• Clock de-skewing
• Timing adjustments
• Aperture centering
页面指南
