SI5365 Datasheet, PDF (1/18 Pages) Silicon Laboratories – PIN-PROGRAMMABLE PRECISION CLOCK MULTIPLIER

Si5365
PRELIMINARY DATA SHEET
PIN-PROGRAMMABLE PRECISION CLOCK MULTIPLIER
Description
The Si5365 is a low jitter, precision clock multiplier for
high-speed communication systems, including SONET
OC-48/OC-192, Ethernet, and Fibre Channel, in which
the application requires clock multiplication without
jitter attenuation. The Si5365 accepts four clock inputs
ranging from 19.44 to 707 MHz and generates five
frequency-multiplied clock outputs ranging from 19.44
to 1050 MHz. The input clock frequency and clock
multiplication ratio are selectable from a table of
popular SONET, Ethernet, and Fibre Channel rates.
The Si5365 is based on Silicon Laboratories' 3rd-
generation DSPLL^® technology, which provides any-
rate frequency synthesis in a highly integrated PLL
solution that eliminates the need for external VCXO
and loop filter components. The DSPLL loop bandwidth
is digitally programmable, providing jitter performance
optimization at the application level. Operating from a
single 1.8 or 2.5 V supply, the Si5365 is ideal for
providing clock multiplication in high performance
timing applications.
Applications
„ SONET/SDH OC-48/OC-192 line cards
„ GbE/10GbE, 1/2/4/8/10GFC line cards
„ ITU G.709 line cards
„ Test and measurement
Features
„ Selectable output frequencies ranging from 19.44 to
1050 MHz
„ Low jitter clock outputs w/jitter generation as low as
0.6 ps rms (50 kHz–80 MHz)
„ Integrated loop filter with selectable loop bandwidth
(30 kHz to 1.3 MHz)
„ Four clock inputs w/manual or automatically
controlled hitless switching
„ Five clock outputs with selectable signal format
(LVPECL, LVDS, CML, CMOS)
„ Support for ITU G.709 FEC ratios (255/238,
255/237, 255/236)
„ LOS alarm outputs
„ Digitally-controlled output phase adjust
„ Pin-programmable settings
„ On-chip voltage regulator for 1.8 or 2.5 V ±10%
operation
„ Small size: 14 x 14 mm 100-pin TQFP
„ Pb-free, RoHS compliant
CKIN1
CKIN2
CKIN3
CKIN4
÷ N31
÷ N32
÷ N33
÷ N34
Manual/Auto Switch
Clock Select
LOS/FOS Alarms
Frequency Select
Bandwidth Select
Control
DSPLL^®
÷ N2
÷ NC1
÷ NC2
÷ NC3
÷ NC4
÷ NC5
CKOUT1
CKOUT2
CKOUT3
Divider Select
CKOUT4
CKOUT5
VDD (1.8 or 2.5 V)
GND
Preliminary Rev. 0.34 3/07
Copyright © 2007 by Silicon Laboratories
Si5365
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.