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See Technical Specifications

844441DMI-300LF

FemtoClock® SAS/SATA Clock Generator

Manufacturer:

Renesas Electronics Corporation
Mfr.Part #:

844441DMI-300LF
Datasheet:

844441DMI-300LF Datasheet (PDF)
Series:

FemtoClock®
Programmabe:

Not Verified
PLL:

Yes
Main Purpose:

SAS, SAS-2, SATA CPU

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

844441DMI-300LF General Description

The 844441I is a low jitter, high performance clock generator and a member of the FemtoClock® family of silicon timing products. The 844441I is designed for use in applications using the SAS and SATA interconnect. The 844441I uses an external, 25MHz, parallel resonant crystal to generate four selectable output frequencies: 75MHz, 100MHz, 150MHz, and 300MHz. This silicon based approach provides excellent frequency stability and reliability. The 844441I features down and center spread spectrum (SSC) clocking techniques.

Key Features

Designed for use in SAS, SAS-2, and SATA systems
Center (±0.25%) Spread Spectrum Clocking (SSC)
Down (-0.23% or -0.5%) SSC
Better frequency stability than SAW oscillators
One differential 2.5V LVDS output
Crystal oscillator interface designed for 25MHz (CL = 18pF) frequency
External fundamental crystal, ensures high reliability and low aging
Selectable output frequencies: 75MHz, 100MHz, 150MHz, 300MHz
Output frequency is tunable with external capacitors
RMS phase jitter @ 100MHz, using a 25MHz crystal (12kHz – 20MHz): 1.1936ps (typical)
2.5V operating supply
-40°C to 85°C ambient operating temperature
Available in lead-free (RoHS 6) packages

Specifications

Series	FemtoClock®	Programmabe	Not Verified
PLL	Yes	Main Purpose	SAS, SAS-2, SATA CPU
Input	Crystal	Output	LVDS
Number of Circuits	1	Ratio - Input:Output	1:1
Differential - Input:Output	No/Yes	Frequency - Max	300MHz
Voltage - Supply	2.375V ~ 2.625V	Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount	Base Product Number	844441D