Datasheet > 540ACA20M0000BBGR

540ACA20M0000BBGR

更新时间： 2024-11-05 09:00:43

品牌	Logo	应用领域
芯科 - SILICON		/
页数	文件大小	规格书
16页	834K
描述
LVPECL Output Clock Oscillator,

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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^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 mmfootprints, 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.

• 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

• 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

• 3.2×5, 5x7 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

Pin Assignments

• 3G-SDI/12G-SDI/24G-SDI broadcast video

VDD

CLK-

CLK+

OE/NC

NC/OE

GND

• Servers, switches, storage, NICs, search

acceleration

• Test and measurement

• Clock and data recovery

• FPGA/ASIC clocking

(Top View)

Fixed

Frequency

Crystal

Frequency

Flexible

DSPLL

Pin #

Descriptions

Low

Noise

1, 2

Selectable via ordering option

OE = Output enable; NC = No connect

Driver

DCO

Digital

Phase

Detector

Digital

Phase Error

Loop

OSC

Cancellation

Filter

GND = Ground

Flexible

Formats,

1.8V – 3.3V

Phase Error

CLK+ = Clock output

Fractional

Operation

Divider

NVM

Control

CLK- = Complementary clock output. Not used

for CMOS.

Power Supply Regulation

VDD = Power supply

Output Enable

(Pin Control)

Built-in Power Supply

Noise Rejection

silabs.com | Building a more connected world.

Rev. 1.0

12 3 4 5 6 7...16

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