540CAD156M250BBGR datasheet, PDF

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540CAD156M250BBGR: DescriptionCMOS Output Clock Oscillator,; CategoryPassive components oscillator; File Size1MB，20 Pages; ManufacturerSilicon Laboratories Inc

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540CAD156M250BBGR Overview

CMOS Output Clock Oscillator,

540CAD156M250BBGR Parametric

Parameter Name	Attribute value
Objectid	7203488749
package instruction	CLCC, 6 PIN
Reach Compliance Code	unknown
Other features	TRI-STATE; ENABLE/DISABLE FUNCTION; TR
maximum descent time	1.5 ns
Frequency Adjustment - Mechanical	NO
frequency stability	20%
Installation features	SURFACE MOUNT
Number of terminals	6
Nominal operating frequency	156.25 MHz
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Oscillator type	CMOS
Output load	5 pF
physical size	5.0mm x 3.2mm x 1.33mm
longest rise time	1.5 ns
Maximum supply voltage	3.465 V
Minimum supply voltage	3.135 V
Nominal supply voltage	3.3 V
surface mount	YES
maximum symmetry	55/45 %

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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

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

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 specifi-

cations, 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 PSNR and supply noise immunity:

–80 dBc Typ

• 7 ppm stability option (-40 to 85C)

• 3.3 V, 2.5 V and 1.8 V V

supply operation

from the same part number

• LVPECL, LVDS, CML, HCSL, CMOS, and

Dual CMOS output options

• 2.5×3.2, 3.2×5, 5x7 mm package options

• 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

(Top View)

• Servers, switches, storage, NICs, search

acceleration

• Test and measurement

• Clock and data recovery

• FPGA/ASIC clocking

NC/OE

GND

Pin #

1, 2

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

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

Rev. 1.2 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021

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