SY89297U Datasheet, PDF (1/15 Pages) Micrel Semiconductor – 2.5/3.3V, 3.2Gbps Precision CML

SY89297U
2.5/3.3V, 3.2Gbps Precision CML
Dual-Channel Programmable Delay
General Description
The SY89297U is a DC-3.2Gbps programmable, two-
channel delay line. Each channel has a delay range from
2ns to 7ns (5ns delta delay) in programmable increments
as small as 5ps. The delay step is extremely linear and
monotonic over the entire programming range, with 15ps
INL over temperature and voltage.
The delay varies in discrete steps based on a serial control
word provided by the 3-pin serial control (SDATA, SCLK,
and SLOAD). The control word for each channel is 10-bits.
Both channels are programmed through a common serial
interface. For increased delay, multiple SY89297U delay
lines can be cascaded together.
The SY89297U provides two independent 3.2Gbps delay
lines in an ultra-small 4mm x 4mm, 24-pin QFN package.
For other delay line solutions, consider the SY89295U and
SY89296U single-channel delay lines. Evaluation boards
are available for all these parts.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
Precision Edge^®
• Dual-channel, programmable delay line
• Serial programming interface (SDATA, SCLK, SLOAD)
• Guaranteed AC performance over temperature and
voltage:
– > 3.2Gbps/1.6GHz f_MAX
• Programming Accuracy:
– Linearity: −15ps to +15ps INL
– Monotonic: −5ps to +25ps
– Resolution: 5ps programming increments
• Low-jitter design: 1ps_RMS typical random jitter
• Programmable delay range: 5ns delay range
• Cascade capability for increased delay
• Flexible voltage operation:
– V_CC = 2.5V ± 5% or 3.3V ± 10%
• Industrial temperature range: −40°C to +85°C
• Available in 24-pin (4mm x 4mm) QFN
Applications
• Clock de-skewing
• Timing adjustments
• Aperture centering
• System calibration
Markets
• Automated test equipment
• Digital radio and video broadcasting
• Closed caption encoders/decoders
• Test and measurement
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
December 2011
M9999-120211-C
[e-mail] or [phone]