545BBA25M0000BBG datasheet, PDF

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545BBA25M0000BBG: DescriptionStandard clock oscillator; CategoryPassive components Frequency controller and a timer oscillator The standard clock oscillator; File Size863KB，17 Pages; ManufacturerSilicon Labs; Websitehttps://www.silabs.com; Environmental Compliance

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545BBA25M0000BBG Overview

Standard clock oscillator

545BBA25M0000BBG Parametric

Parameter Name	Attribute value
Maker	Silicon Labs
Product Category	Standard clock oscillator
frequency	25 MHz
frequency stability	25 PPM
load capacitance	5 pF
Working power voltage	1.8 V, 2.5 V, 3.3 V
Supply voltage - min.	1.71 V
Supply voltage - max.	3.465 V
Output format	LVDS
Termination type	SMD/SMT
Package/box	3.2 mm x 5 mm
Minimum operating temperature	- 40 C
Maximum operating temperature	+ 85 C
length	5 mm
width	3.2 mm
high	1.17 mm
series	Si545
Current rating	83 mA
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

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

OE/NC

NC/OE

GND

VDD

CLK-

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

• 7 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

(Top View)

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.

This information applies to a product under development. Its characteristics and specifications are subject to change without notice.

Rev. 1.0

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