8T49N028-010NLGI

Series:	FemtoClock® NG
Packaging:	Tray
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
PLL:	Yes with Bypass
Input:	Crystal
Output:	LVPECL
Number of Circuits:	1
Ratio - Input:Output:	1:8
Differential - Input:Output:	No/Yes
Frequency - Max:	156.25MHz
Divider/Multiplier:	Yes/No
Voltage - Supply:	2.375 V ~ 3.465 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	48-VFQFN Exposed Pad
Supplier Device Package:	48-VFQFPN (7x7)

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The 8T49N028-010NLGI is a programmable 4-output fractional-N synthesizer that provides high jitter performance, high frequency resolution and fast design cycles required for precise clocking. This integrated circuit allows users to cascade multiple devices together to generate complex clock signals up to 8GHz, supported by a wide range of features and characteristics, making it ideal for an array of applications.

Application Field

The 8T49N028-010NLGI is ideally suited for clocking in a wide range of applications. In communications systems, it is used to generate the clocking signal for external components such as field-programmable gate array (FPGA) and delicate analogue-to-digital and digital-to-analogue converters.

The device is also widely used in data storage systems, specifically for critical clocking signals to hard disk drives (HDD) and solid-state drives (SSD). In addition, this synthesizer is employed in gaming systems, where highly precise timing signals are needed to accurately detect the inputs of gamers.

The 8T49N028-010NLGI is also appropriate for high-end clocking solutions in advanced computing and industrial solutions.

Working Principle

The 8T49N028-010NLGI is built on a fractional-N synthesizer architecture. The input clock, provided by a crystal oscillator or a reference clock, is given to the device, typically between 25MHz and 600MHz. The 8T49N028-010NLGI then employs an advanced high-density digital tuning logic that is combined with a dual loop architecture that provides low jitter, high frequency output.

The dual loop Architecture consists of a frequency-tuned loop and a phase-locked loop. The Fractional-N divider in the frequency-tuned loop is enabled with a 13-bit resolution, which allows programmers to achieve a high frequency resolution with minimal tuning granularity. In contrast, the PLL enables fractional-N synthesis and the generation of multiple clock signals by enabling an 8-bit register. These clocking signals are generated with low-noise, low additive jitter regardless of the used frequency.

The 8T49N028-010NLGI is implemented with an on-chip library of pre-programmed clocking solutions. These programmable solutions can be tuned to match customer’s needs quickly and with strong precision. In addition, a graphical interface allows users to visualize the generated values and the effects of the numerically targeted parameters.

The 8T49N028-010NLGI provides designers with multiple additional features, such as temperature compensation, clock phase-shift tuning, slew rate control and much more.

The 8T49N028-010NLGI offers users the best performance and features for their applications.

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