Crystal Oscillator. Si545 Datasheet

Si545 Oscillator. Datasheet pdf. Equivalent

Part Si545
Description Crystal Oscillator
Feature Ultra Series™ Crystal Oscillator Si545 Data Sheet Ultra Low Jitter Any-Frequency XO (80 fs), 0.2 to.
Manufacture Silicon Labs
Datasheet
Download Si545 Datasheet



Si545
Ultra SeriesCrystal Oscillator
Si545 Data Sheet
Ultra Low Jitter Any-Frequency XO (80 fs), 0.2 to 1500 MHz
The Si545 Ultra Seriesoscillator utilizes Silicon Laboratories’ advanced 4th
generation DSPLL® technology to provide an ultra-low jitter, low phase noise clock at
any output frequency. The device is factory-programmed to any frequency from 0.2 to
1500 MHz with <1 ppb resolution and maintains exceptionally low jitter for both
integer and fractional frequencies across its operating range. The Si545 offers
excellent reliability and frequency stability as well as guaranteed aging performance.
On-chip power supply filtering provides industry-leading power supply noise rejection,
simplifying the task of generating low jitter clocks in noisy systems that use switched-
mode power supplies. Offered in a small, industry-standard 3.2×5 mm footprint, the
Si545 has a dramatically simplified supply chain that enables Silicon Labs to ship
custom frequency samples 1-2 weeks after receipt of order. Unlike a traditional XO,
where a different crystal is required for each output frequency, the Si545 uses one
simple crystal and a DSPLL IC-based approach to provide the desired output
frequency. This process also guarantees 100% electrical testing of every device. The
Si545 is factory-configurable for a wide variety of user specifications, including
frequency, output format, and OE pin location/polarity. Specific configurations are
factory-programmed at time of shipment, eliminating the long lead times associated
with custom oscillators.
Pin Assignments
OE/NC 1
NC/OE 2
GND 3
6 VDD
5 CLK-
4 CLK+
KEY FEATURES
• Available with any frequency from 0.2
MHz to 1500 MHz
• Ultra low jitter: 80 fs Typ RMS
(12 kHz – 20 MHz)
• Excellent PSRR and supply noise
immunity: –80 dBc Typ
• 3x tighter stability than SAW oscillators
• 3.3 V, 2.5 V and 1.8 V VDD supply
operation from the same part number
• LVPECL, LVDS, CML, HCSL, CMOS,
and Dual CMOS output options
• 3.2×5 mm package footprint
• Samples available with 1-2 week lead
times
APPLICATIONS
• 100G/200G/400G OTN, coherent optics
• 10G/40G/100G optical ethernet
• 3G-SDI/12G-SDI/24G-SDI broadcast
video
• Datacenter
• Test and measurement
• Clock and data recovery
• FPGA/ASIC clocking
(Top View)
Pin #
Descriptions
1, 2 Selectable via ordering option
OE = Output enable; NC = No connect
3 GND = Ground
4 CLK+ = Clock output
5 CLK- = Complementary clock output. Not used for CMOS.
6 VDD = Power supply
Fixed
Frequency
Crystal
Frequency
Flexible
DSPLL
OSC
NVM
Control
Digital
Phase
Detector
Phase Error
Cancellation
Digital
Loop
Filter
Phase Error
Fractional
Divider
Power Supply Regulation
DCO
Output Enable
(Pin Control)
Built-in Power Supply
Noise Rejection
Low
Noise
Driver
Flexible
Formats,
1.8V – 3.3V
Operation
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Rev. 0.7



Si545
Si545 Data Sheet
Ordering Guide
1. Ordering Guide
The Si545 XO supports a variety of options including frequency, output format, and OE pin location/polarity, as shown in the chart
below. Specific device configurations are programmed into the part at time of shipment, and samples are available in 1-2 weeks. Silicon
Laboratories provides an online part number configuration utility to simplify this process. Refer to www.silabs.com/oscillators to access
this tool and for further ordering instructions.
XO Series
Description
545 Single Frequency
Temp Stability Total Stability 2
A 20 ppm
50 ppm
Package
B 3.2x5 mm
Temperature Grade
G -40 to 85 °C
545 A A A - - - - - - - B A G R
Signal Format
LVPECL
LVDS
CMOS
CML
HCSL
Dual CMOS
(In-Phase)
Dual CMOS
(Complementary)
Custom1
VDD Range
2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
1.8, 2.5, 3.3 V
Order
Option
A
B
C
D
E
F
G
X
OE Pin
A Pin 1
B Pin 1
C Pin 2
D Pin 2
OE Polarity
Active High
Active Low
Active High
Active Low
Device Revision
R
<Blank>
Reel
Tape and Reel
Coil Tape
Frequency Code3
Mxxxxxx
xMxxxxx
xxMxxxx
xxxMxxx
xxxxMxx
xxxxxx
Description
FCLK < 1 MHz
1 MHz FCLK < 10 MHz
10 MHz FCLK < 100 MHz
100 MHz FCLK < 1000 MHz
1000 MHz FCLK 1500 MHz
Custom code if FCLK > 6 digits
Notes:
1. Contact Silicon Labs for non-standard configurations.
2. Total stability includes temp stability, initial accuracy, load pulling, VDD variation, and 20 year aging at 70 °C.
3. For example: 156.25 MHz = 156M250; 25 MHz = 25M0000. Create custom part numbers at www.silabs.com/oscillators.
1.1 Technical Support
Frequently Asked Questions (FAQ)
Oscillator Phase Noise Lookup Utility
Quality and Reliability
Development Kits
www.silabs.com/Si545-FAQ
www.silabs.com/oscillator-phase-noise-lookup
www.silabs.com/quality
www.silabs.com/oscillator-tools
silabs.com | Building a more connected world.
Rev. 0.7 | 2





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