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540CAA48M0000BAG

Description
Standard Clock Oscillators PROGRAMMABLE XO 0.125ps RMS JTR NCNR
CategoryPassive components   
File Size868KB,16 Pages
ManufacturerSilicon Laboratories
Environmental Compliance
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540CAA48M0000BAG Overview

Standard Clock Oscillators PROGRAMMABLE XO 0.125ps RMS JTR NCNR

540CAA48M0000BAG Parametric

Parameter NameAttribute value
Product AttributeAttribute Value
ManufacturerSilicon Laboratories
Product CategoryStandard Clock Oscillators
RoHSDetails
Frequency48 MHz
Frequency Stability50 PPM
Load Capacitance5 pF
Operating Supply Voltage1.8 V, 2.5 V, 3.3 V
Supply Voltage - Min1.71 V
Supply Voltage - Max3.465 V
Output FormatCMOS
Termination StyleSMD/SMT
Package / Case3.2 mm x 5 mm
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 85 C
Length5 mm
Width3.2 mm
Height1.17 mm
Current Rating74 mA
TypeUltra Low Jitter
Duty Cycle - Max55 %
Factory Pack Quantity50
Ultra Series
Crystal Oscillator
Si540 Data Sheet
Ultra Low Jitter Any-Frequency XO (125 fs), 0.2 to 1500 MHz
KEY FEATURES
The Si540 Ultra Series
oscillator utilizes Silicon Laboratories’ advanced 4
th
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 Si540
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 industry-standard
3.2×5 mm and 5×7 mm footprints, the Si540 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 Si540 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 Si540 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
• Available with any frequency from 0.2 MHz to
1500 MHz
• Very low jitter: 125 fs Typ RMS
(12 kHz – 20 MHz)
• Excellent PSRR and supply noise immunity:
–80 dBc Typ
• 10 ppm stability option (-40 to 85C)
• 3.3 V, 2.5 V and 1.8 V V
DD
supply operation
from the same part number
• LVPECL, LVDS, CML, HCSL, CMOS, and
Dual CMOS output options
• 3.2×5, 5×7 mm package footprints
• Any custom frequency 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
VDD
CLK-
CLK+
OE/NC
1
2
3
(Top View)
6
5
4
• Servers, switches, storage, NICs, search
acceleration
• Test and measurement
• Clock and data recovery
• FPGA/ASIC clocking
NC/OE
GND
Pin #
1, 2
3
4
5
6
Descriptions
Selectable via ordering option
OE = Output enable; NC = No connect
GND = Ground
CLK+ = Clock output
CLK- = Complementary clock output. Not used
for CMOS.
VDD = Power supply
NVM
Control
Fixed
Frequency
Crystal
Frequency
Flexible
DSPLL
DCO
Low
Noise
Driver
OSC
Digital
Phase
Detector
Phase Error
Cancellation
Phase Error
Fractional
Divider
Digital
Loop
Filter
Flexible
Formats,
1.8V – 3.3V
Operation
Power Supply Regulation
Output Enable
(Pin Control)
Built-in Power Supply
Noise Rejection
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