Si5317
PRELIMINARY DATA SHEET
PIN-CONTROLLED 1–710 MHZ JITTER CLEANING CLOCK
Features
Provides jitter attenuation on any
frequency
One clock input / two clock outputs
Input/output frequency range:
1–710 MHz
Selectable output clock signal
format: LVPECL, LVDS, CML or
CMOS
Single supply: 1.8, 2.5, or 3.3 V
VCO freeze during LOS/LOL
Loss of lock and loss of signal alarms
On-chip voltage regulator with high
PSRR
Ultra low jitter: 300 fs
(12 kHz–20 MHz) typical
Simple pin control interface
Selectable loop bandwidth for jitter
attenuation: 60 Hz–8.4 kHz
Small size: 6 x 6 mm, 36-QFN
Wide temperature range: –40 to
+85 ºC
Applications
Ordering Information:
See page 43.
Data converter clocking
Wireless infrastructure
Networking, SONET/SDH
Switches and routers
Medical instrumentation
Test and measurement
Pin Assignments
Description
The Si5317 is a flexible 1:1 jitter cleaning clock for high-performance applications
that require jitter attenuation without clock multiplication. The Si5317 accepts a
single clock input ranging from 1 to 710 MHz and generates two low jitter clock
outputs at the same frequency. The clock frequency range and loop bandwidth are
selectable from a simple look-up table. The Si5317 is based on Silicon
Laboratories' 3rd-generation DSPLL® technology, which provides jitter attenuation
on any frequency in a highly integrated PLL solution that eliminates the need for
external VCXO and loop filter components. The DSPLL loop bandwidth is user
selectable, providing jitter performance optimization at the application level.
36 35 34 33 32 31 30 29 28
RST
FRQTBL
LOS
NC
1
2
3
4
5
6
7
8
9
27 FRQSEL3
26
FRQSEL2
25 FRQSEL1
24
23
FRQSEL0
BWSEL1
GND
Pad
VDD
XA
22 BWSEL0
XB
21
20
19
NC
GND
NC
DEC
INC
Functional Block Diagram
10 11 12 13 14 15 16 17 18
XTAL/Clock
Clock Out1
Clock In
DSPLL ®
Signal Format [1:0]
Clock Out2
Status/Control
High
PSRR
Regulator
VDD (1.8, 2.5, 3.3 V)
GND
Frequency Table
Loss of Lock
Frequency Select [3:0]
Bandwidth Select [1:0]
Phase Skew INC/DEC
Loss of Signal
XTAL/Clock Rate [1:0]
Preliminary Rev. 0.15 4/10
Copyright © 2010 by Silicon Laboratories
Si5317
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.