SY89832U_07 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – 2.5V ULTRA-PRECISION 1:4 LVDS FANOUT BUFFER/TRANSLATOR WITH INTERNAL TERMINATION

Micrel, Inc.
2.5V ULTRA-PRECISION 1:4 LVDS
FANOUT BUFFER/TRANSLATOR
WITH INTERNAL TERMINATION
Precision Edge^®
Precision E^SYd⁸g⁹e^83®2U
SY89832U
FEATURES
■ Guaranteed AC performance over temperature
and voltage:
• DC-to >2.0GHz throughput
• <570ps propagation delay (IN-to-Q)
• <20ps within-device skew
• <200ps rise/fall time
■ Ultra-low jitter design:
• <1ps_RMS cycle-to-cycle jitter
• <1ps_RMS random jitter
• <10ps_PP deterministic jitter
• <10ps_PP total jitter (clock)
■ Unique, patent-pending input termination and VT pin
accepts DC– and AC–coupled inputs
■ High-speed LVDS outputs
■ 2.5V voltage supply operation
■ Industrial temperature range: –40°C to +85°C
■ Available in 16-pin (3mm × 3mm) MLF^® package
APPLICATIONS
■ Processor clock distribution
■ SONET clock distribution
■ Fibre Channel clock distribution
■ Gigabit Ethernet clock distribution
Precision Edge^®
DESCRIPTION
The SY89832U is a 2.5V, high-speed, 2GHz differential
LVDS (Low Voltage Differential Swing) 1:4 fanout buffer
optimized for ultra-low skew applications. Within device skew
is guaranteed to be less than 20ps over supply voltage and
temperature.
The differential input buffer has a unique internal
termination design that allows access to the termination
network through a VT pin. This feature allows the device to
easily interface to different logic standards. A VREF–AC
reference output is included for AC-coupled applications.
The SY89832U is a part of Micrel's high-speed clock
synchronization family. For 3.3V applications, see SY89833L.
For applications that require a different I/O combination,
consult Micrel's website at www.micrel.com, and choose
from a comprehensive product line of high-speed, low-skew
fanout buffers, translators and clock generators.
FUNCTIONAL BLOCK DIAGRAM
1:4
IN
50Ω
VT
/IN ^50Ω
VREF-AC
EN
(LVTTL/CMOS)
DQ
TYPICAL PERFORMANCE
622MHz Output
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
TIME (200ps/div.)
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
February 2007
1
M9999-020707
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