SY58033U_11 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – ULTRA-PRECISION 1:8 fanout buffer WITH 400mV LVPECL outputs

Micrel, Inc.
ULTRA-PRECISION 1:8 fanout
buffer WITH 400mV LVPECL outputs
Precision Edge^®
Precision E^Sd^Y5g⁸e^0®33U
and INTERNAL TERMINATION
SY58033U
FEATURES
■ Precision 1:8, 400mV LVPECL fanout buffer
■ Low-jitter performance:
• 76fs_RMS phase jitter (typ)
■ Guaranteed AC performance over temperature and
voltage:
• Clock frequency range:  DC to 5.5GHz
• <80ps t_r / t_f times
• <280ps t_pd
• <20ps skew
■ 100k LVPECL compatible outputs
■ Fully differential inputs/outputs
■ Accepts an input signal as low as 100mV
■ Unique input termination and V_T 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) QFN Package
APPLICATIONS
■ 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
DESCRIPTION
Precision Edge^®
The SY58033U is a 2.5V/3.3V precision, high-speed, fully
differential 400mV LVPECL 1:8 fanout buffer. The SY58033U
is optimized to provide eight identical output copies with
less than 20ps of skew and only 76fs_RMS phase jitter. It can
process clock signals as fast as 5.5GHz.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the SY58033U to directly
interface to LVPECL, CML, and LVDS differential signal
(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 solution. The LVPECL (100k temperature
compensated) outputs feature a 400mV typical swing into
50 ohms loads, and provide an extremely fast rise/fall time
guaranteed to be less than 80ps.
The SY58033U 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). Other high-speed 1:8
fanout buffers include the CML SY58031U and the 800mV
LVPECL SY58032U. The SY58033U 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
Precision Edge is a registered trademark of Micrel, Inc.
M9999-072810
[e-mail] or [phone]
1
Rev.: F
Amendment: /0
Issue Date: October 2011