SI5338 Datasheet, PDF (1/170 Pages) Silicon Laboratories – I2C-PROGRAMMABLE ANY-FREQUENCY, ANY-OUTPUT QUAD CLOCK GENERATOR

Si5338
I ²C - P ROGRAMMABLE A NY- F REQUENCY, A NY- O UTPUT Q UAD C LOCK G ENERATOR
Features
 Low power MultiSynth™ technology  Single supply core with excellent
enables independent, any-frequency
PSRR: 1.8, 2.5, 3.3 V
synthesis on four differential output  Independent frequency increment/
drivers
decrement feature enables
 Highly-configurable output drivers with glitchless frequency adjustments in
up to four differential outputs, eight
1 ppm steps
single-ended clock outputs, or a
 Independent phase adjustment on
combination of both
each of the output drivers with an
 Low phase jitter of 0.7 ps RMS typ
accuracy of <20 ps steps
 High precision synthesis allows true  Highly configurable spread
zero ppm frequency accuracy on all
spectrum (SSC) on any output:
outputs
Any frequency from 5 to 350 MHz
 Flexible input reference:
Any spread from 0.5 to 5.0%
External crystal: 8 to 30 MHz
Any modulation rate from 33 to
CMOS input: 5 to 200 MHz
63 kHz
SSTL/HSTL input: 5 to 350 MHz  External feedback mode allows
Differential input: 5 to 710 MHz
zero-delay mode
 Independently configurable outputs ^{ Loss of lock and loss of signal}
support any frequency or format:
alarms
LVPECL/LVDS: 0.16 to 710 MHz _{ I}²_{C/SMBus compatible interface}
HCSL: 0.16 to 250 MHz
 Easy to use programming software
CMOS: 0.16 to 200 MHz
 Small size: 4 x 4 mm, 24-QFN
SSTL/HSTL: 0.16 to 350 MHz
 Low power: 45 mA core supply typ
 Independent output voltage per driver: _{ Wide temperature range: –40 to}
1.5, 1.8, 2.5, or 3.3 V
+85 °C
Applications
 Ethernet switch/router
 PCI Express 2.0/3.0
 Broadcast video/audio timing
 Processor and FPGA clocking
 Any-frequency clock conversion
 MSAN/DSLAM/PON
 Fibre Channel, SAN
 Telecom line cards
Ordering Information:
See page 168.
Pin Assignments
Top View
24 23 22 21 20 19
IN1 1
18 CLK1A
IN2 2
17 CLK1B
IN3 3
IN4 4
GPGNaNdDD
16 VDDO1
15 VDDO2
IN5 5
14 CLK2A
IN6 ⁶
13 _CLK2B
7 8 9 10 11 12
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 I²C/
SMBus-compatible serial interface and supports operation from a 1.8, 2.5, or
3.3 V core supply. I²C device programming is made easy with the ClockBuilder™
Desktop software available at www.silabs.com/ClockBuilder.
Rev. 0.6 9/10
Copyright © 2010 by Silicon Laboratories
Si5338