Si5341/40
LOW-JITTER, 10-OUTPUT, ANY-FREQUENCY, ANY-OUTPUT
CLOCK GENERATOR
Features
Generates up to 10 independent
output clocks
Ultra-low jitter: <100 fs RMS typical
MultiSynth™ technology enables any-
frequency synthesis on any-output
Highly configurable outputs
compatible with LVDS, LVPECL, CML, Status monitoring: LOS, LOL
LVCMOS, HCSL, or programmable
voltage
DCO mode with frequency steps as
low as 0.001 ppb
Independent output clock supply pins:
3.3 V, 2.5 V, or 1.8 V
Built-in power supply filtering and
regulation
2
Serial Interface: I C or SPI (3-wire or
4-wire)
9x9 mm
7x7 mm
Input frequency range:
User programmable (2x) non-volatile
OTP memory
External crystal: 25, 48-54 MHz
Differential clock: 10 to 750 MHz
LVCMOS clock: 10 to 250 MHz
Output frequency range:
Differential: 100 Hz to 712.5 MHz
LVCMOS: 100 Hz to 250 MHz
Output-output skew: 20 ps typ
Adjustable output-output delay
Optional zero delay mode
Ordering Information
TM
ClockBuilder Pro software utility
See Section 8.
simplifies device configuration and
assigns customer part numbers
Si5341: 4 input, 10 output, compact
9x9 mm, 64 QFN
Si5340: 4 input, 4 output, compact
7x7 mm, 44 QFN
Functional Block Diagram
Temperature range: –40 to +85 °C
Pb-free, RoHS-6 compliant
Independent glitchless on-the-fly
output frequency changes
Si5341/40
IN_SEL[1:0]
Device Selector Guide
IN0
IN1
IN2
÷INT
÷INT
÷INT
Grade
Si534xA
Si534xB
Si534xC
Si534xD
Max Output Frequency
712.5 MHz
Frequency Synthesis Mode
Integer + Fractional
PLL
350 MHz
XA
712.5 MHz
OSC
Integer Only
350 MHz
XB
FB_IN
÷INT
Applications
Clock tree generation replacing XOs,
Ethernet switches/routers
OTN framers/mappers/processors
Test equipment & instrumentation
Broadcast video
Multi
Synth
buffers, signal format translators
Any-frequency clock translation
Clocking for FPGAs, processors,
memory
÷INT
÷INT
OUT0
OUT1
OUT2
Multi
Synth
Multi
Synth
÷INT
÷INT
÷INT
÷INT
÷INT
÷INT
÷INT
÷INT
Description
Multi
Synth
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
The any-frequency, any-output Si5341/40 clock generators combine a wide-band PLL
with proprietary MultiSynth fractional synthesizer technology to offer a versatile and
high performance clock generator platform. This highly flexible architecture is capable
of synthesizing a wide range of integer and non-integer related frequencies up to
712.5 MHz on 10 differential clock outputs while delivering sub-100 fs rms phase jitter
performance with 0 ppm error. Each of the clock outputs can be assigned its own
format and output voltage enabling the Si5341/40 to replace multiple clock ICs and
oscillators with a single device making it a true “clock tree on a chip”.
Multi
Synth
NVM
I2C/SPI
The Si5341/40 can be quickly and easily configured using ClockBuilder Pro software.
Custom part numbers are automatically assigned using a ClockBuilder Pro for fast,
free, and easy factory pre-programming, or the Si5341/40 can be programmed in-
Control/
Status
2
circuit via I C and SPI serial interfaces.
Rev. 1.0 7/15
Copyright © 2015 by Silicon Laboratories
Si5341/40