Copyright © 2015 by Silicon Laboratories 7.15.15
Control
Logic
P0
P1
VDDO
R0
R1
CLK0
CLK1
R2
CLK2
MultiSynth
0
MultiSynth
1
MultiSynth
2
VDD
GND
10-MSOP
OSC
XA
XB
PLL
A
PLL
B
Control
Logic
P2
P3
P4
P0
P1
R0
R1
CLK0
CLK1
VDDOA
R2
R3
CLK2
CLK3
VDDOB
R4
R5
CLK4
CLK5
VDDOC
R6
R7
CLK6
CLK7
VDDOD
MultiSynth
0
MultiSynth
1
MultiSynth
2
MultiSynth
3
MultiSynth
4
MultiSynth
5
MultiSynth
6
MultiSynth
7
VDD
GND
20-QFN
OSC
XA
XB
PLL
A
PLL
B
Si5350/51-B
Factory-Programmable Any-Frequency CMOS Clock Generator
Description
The Si5350/51 family of highly flexible, programmable
clock generators can be customized to generate up to
eight independent non-integer-related frequencies. The
devices have eight CMOS clock outputs offered in a
space saving 4x4
mm 20-QFN or lower cost three clock
output versions offered in a 10-MSOP package. Each
output has an independent MultiSynth™ fractional
divider that accepts a high-frequency reference from
one of the device’s internal PLLs and accurately divides
down the clock to generate unique, non-integer-related
frequencies from 2.5
kHz to 200 MHz. Any combination
of output frequencies can be generated by the device.
All clocks are generated with 0
ppm frequency
synthesis error, enabling the replacement of XOs and
PLL-based clocks while simplifying design and
minimizing cost. As an added feature, the Si5350/51
features an integrated VCXO which eliminates the need
for pullable crystals. The Si5350 features configurable
control pin options allowing the direct pin control of
frequency select, output enable, spread spectrum
enable and powerdown. Each output supports 1.8, 2.5,
or 3.3
V operation, eliminating the need for external
level translators in mixed-supply applications.
Features
- Generates any frequency on any output
-
2.5 kHz to 200 MHz
- Exact clock synthesis: 0 ppm error
- Similar frequency flexibility as 8 independent PLLs
- Accepts crystal or external reference clock
- < 70 ps typical period jitter for any configuration
- Glitchless switching between output frequencies
- Integrated VCXO eliminates need for pullable
crystal
- Si5350 (pin) and Si5351 (I
2
C) versions
- User-definable control pins:
-
Frequency select, output enable, spread spectrum
enable, powerdown
- Spread spectrum clock generation
-
–0.1 to –2.5% down, ±0.1 to ±1.5% center
- Two week sample lead time for any custom clock
- Small size: 4x4 mm 20-QFN and 10-MSOP
-
Industrial temperature range: –40 to +85
Applications
- HDTV, DVD/Blu-ray, set-top box
- Audio/video equipment, gaming
- Printers, scanners, projectors
- Audio DAC/CODEC
- USB Audio
- Residential gateways
- Networking/communication
- Servers, storage
