545AAA1044M50BAG datasheet, PDF

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545AAA1044M50BAG: DescriptionStandard Clock Oscillators Single Frequency XO; CategoryPassive components; File Size814KB，16 Pages; ManufacturerSilicon Laboratories

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545AAA1044M50BAG Overview

Standard Clock Oscillators Single Frequency XO

545AAA1044M50BAG Parametric

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	Silicon Laboratories
Product Category	Standard Clock Oscillators
Frequency	1044.5 MHz
Frequency Stability	50 PPM
Load Capacitance	5 pF
Operating Supply Voltage	2.5 V, 3.3 V
Supply Voltage - Min	2.375 V
Supply Voltage - Max	3.465 V
Output Format	LVPECL
Termination Style	SMD/SMT
Package / Case	3.2 mm x 5 mm
Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 85 C
Length	5 mm
Width	3.2 mm
Height	1.17 mm
Current Rating	107 mA
Type	Crystal Oscillator
Duty Cycle - Max	55 %

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Ultra Series

™

Crystal Oscillator

Si545 Data Sheet

Ultra Low Jitter Any-Frequency XO (80 fs), 0.2 to 1500 MHz

KEY FEATURES

The Si545 Ultra Series

™

oscillator utilizes Silicon Laboratories’ advanced 4

genera-

tion 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 inte-

ger 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, simplify-

ing the task of generating low jitter clocks in noisy systems that use switched-mode

power supplies. Offered in industry-standard 3.2x5 mm and 5x7 mm footprints, the

Si545 has a dramatically simplified supply chain that enables Silicon Labs to ship cus-

tom 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 frequen-

cy. This process also guarantees 100% electrical testing of every device. The Si545 is

factory-configurable for a wide variety of user specifications, including frequency, out-

put format, and OE pin location/polarity. Specific configurations are factory-program-

med at time of shipment, eliminating the long lead times associated with custom oscil-

lators.

Pin Assignments

• 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

• 10 ppm stability option (–40 to 85 °C)

• 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

• 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

OE/NC

(Top View)

VDD

CLK-

CLK+

NC/OE

GND

Pin #

1, 2

Descriptions

Selectable via ordering option

OE = Output enable; NC = No connect

GND = Ground

CLK+ = Clock output

NVM

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

CLK- = Complementary clock output. Not used for CMOS.

VDD = Power supply

Control

Power Supply Regulation

Output Enable

(Pin Control)

Built-in Power Supply

Noise Rejection

silabs.com

| Building a more connected world.

Rev. 0.75

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