Micrel, Inc.
ULTRA-PRECISION 1:8 fanout buffer WITH LVPECL outputs and INTERNAL TERMINATION
Precision Edge®
Precision ESYd5g8e03®2U SY58032U
FEATURES
■ Precision 1:8, LVPECL fanout buffer ■ Guaranteed AC performance over temperature and
voltage: • Clock frequency range: DC to 4GHz • <110ps tr / tf times • <330ps tpd • <20ps skew ■ Low-jitter performance: • 76fsRMS phase jitter (typ) ■ 100k LVPECL compatible outputs ■ Fully differential inputs/outputs ■ Accepts an input signal as low as 100mV ■ Unique input termination and VT pin accepts DC-coupled and AC-coupled differential inputs: (LVPECL, LVDS, and CML) ■ Power supply 2.5V ±5% or 3.3V ±10% ■ Industrial temperature range: –40°C to +85°C ■ Available in 32-pin (5mm x 5mm) MLF® package
APPLICATIONS
DESCRIPTION
Precision Edge®
The SY58032U is a 2.5V/3.3V precision, high-speed, fully differential LVPECL 1:8 fanout buffer. The SY58032U is optimized to provide eight identical output copies with less than 20ps of skew and only 76fsRMS phase jitter. It can process clock signals as fast as 4GHz.
The differential input includes Micrel’s unique, 3-pin input termination architecture that allows the SY58032U to directly interface to LVPECL, CML, and LVDS differential signals (AC- or DC-coupled) without any level-shifting or termination resistor networks in the signal path. The result is a clean, stub-free, low-jitter interface solution. The LVPECL (100k temperature compensated) outputs feature 800mV typical swing into 50ý loads, and provide an extremely fast rise/fall time guaranteed to be less than 110ps.
The SY58032U operates from a 2.5V ±5% supply or 3.3V ±10% supply and is guaranteed over the full industrial temperature range (–40°C to +85°C). For applications that require a higher high-speed 1:8 fanout buffer, consider the SY58031U or SY58033U. The SY58032U is part of Micrel’s high-speed, Precision Edge® product line.
All support documentation can be found on Micrel’s web site at www.micrel.com.
Functional block diagram
■ All SONET and all GigE clock distribution
■ All Fibre Channel clock and data distribution
■ Network routing engine timing distribution
■ High-end, low-skew multiprocessor synchronous clock distribution
IN 50Ω
VT 50Ω
/IN
VREF-AC
United States Patent No. RE44,134 Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-072810
[email protected] or (408) 955-1690
1
Q0 /Q0
Q1 /Q1
Q2 /Q2
Q3 /Q3
Q4 /Q4
Q5 /Q5
Q6 /Q6
Q7 /Q7
Rev.: E Amendment: /0 Issue Date: July 2010
Micrel, Inc.
Precision Edge® SY58032U
PACKAGE/ORDERING INFORMATION
VCC Q0 /Q0 Q1 /Q1 Q2 /Q2 VCC
VCC
GND IN
VT VREF-AC
/IN GND VCC
32 31 30 29 28 27 26 25 1 24
2 23 3 22 4 21 5 20 6 19 7 18
8 17 9 10 11 12 13 14 15 16
GND
VCC Q3
/Q3 Q4 /Q4 VCC GND
VCC /Q7 Q7 /Q6 Q6 /Q5 Q5 VCC
32-Pin MLF® (MLF-32)
Ordering Information(1)
Part Number
Package Operating
Type
Range
Package Marking
SY58032UMI
MLF-32 Industrial
.