Silicon Laboratories I2C Manual

2
I C - P
R O GRA MM A B LE
Q C
UAD LOCK
Features

Low power MultiSynth™ technology
enables independent, any-frequency
synthesis on four differential output
drivers

Highly-configurable output drivers with
up to four differential outputs, eight
single-ended clock outputs, or a
combination of both

Low phase jitter of 0.7 ps RMS typ

High precision synthesis allows true
zero ppm frequency accuracy on all
outputs

Flexible input reference:
External crystal: 8 to 30 MHz

CMOS input: 5 to 200 MHz

SSTL/HSTL input: 5 to 350 MHz

Differential input: 5 to 710 MHz


Independently configurable outputs
support any frequency or format:
LVPECL/LVDS: 0.16 to 710 MHz

HCSL: 0.16 to 250 MHz

CMOS: 0.16 to 200 MHz

SSTL/HSTL: 0.16 to 350 MHz


Independent output voltage per driver:
1.5, 1.8, 2.5, or 3.3 V
Applications

Ethernet switch/router

PCI Express 2.0/3.0

Broadcast video/audio timing

Processor and FPGA clocking
Description
The Si5338 is a high-performance, low-jitter clock generator capable of
synthesizing any frequency on each of the device's four output drivers. This timing
IC is capable of replacing up to four different frequency crystal oscillators or
operating as a frequency translator. Using its patented MultiSynth™ technology,
the Si5338 allows generation of four independent clocks with 0 ppm precision.
Each output clock is independently configurable to support various signal formats
and supply voltages. The Si5338 provides low-jitter frequency synthesis in a
space-saving 4 x 4 mm QFN package. The device is programmable via an I
SMBus-compatible serial interface and supports operation from a 1.8, 2.5, or
2
3.3 V core supply. I C device programming is made easy with the ClockBuilder™
Desktop software available at www.silabs.com/ClockBuilder.
Rev. 1.2 8/12
A - F
NY
G
ENERATOR

Single supply core with excellent
PSRR: 1.8, 2.5, 3.3 V

Independent frequency increment/
decrement feature enables
glitchless frequency adjustments in
1 ppm steps

Independent phase adjustment on
each of the output drivers with an
accuracy of <20 ps steps

Highly configurable spread
spectrum (SSC) on any output:
Any frequency from 5 to 350 MHz

Any spread from 0.5 to 5.0%

Any modulation rate from 33 to

63 kHz

External feedback mode allows
zero-delay mode

Loss of lock and loss of signal
alarms
2

I C/SMBus compatible interface

Easy to use programming software

Small size: 4 x 4 mm, 24-QFN

Low power: 45 mA core supply typ

Wide temperature range: –40 to
+85 °C

Any-frequency clock conversion

MSAN/DSLAM/PON

Fibre Channel, SAN

Telecom line cards

1 GbE and 10 GbE
Copyright © 2012 by Silicon Laboratories
, A
R E Q U E N C Y
IN1
IN2
IN3
IN4
IN5
IN6
2
C/
Si5338
- O
NY UTPUT
Ordering Information:
See page 41.
Pin Assignments
Top View
24 23 22
21 20 19
1
18
17
2
3 16
GND
GND
Pad
4
15
5
14
6 13
7 8 9
10 11 12
CLK1A
CLK1B
VDDO1
VDDO2
CLK2A
CLK2B
Si5338