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Renesas Electronics Corporation

Renesas’ Timing product portfolio has been acquired by SiTime.

Datasheets, documentation, and sample orders remain available on Renesas.com through late 2026. For new designs, purchasing, support, and product inquiries, visit SiTime.com or send an email to [email protected]. Full transition to SiTime is expected by late 2026.

FemtoClock SAS/SATA Clock Generator

Package Information

CAD Model:View CAD Model
Pkg. Type:SOIC
Pkg. Code:DCG8
Lead Count (#):8
Pkg. Dimensions (mm):4.9 x 3.9 x 1.5
Pitch (mm):1.27

Environmental & Export Classifications

Moisture Sensitivity Level (MSL)1
Pb (Lead) FreeYes
ECCN (US)EAR99
HTS (US)8542.39.0090

Product Attributes

Lead Count (#)8
Carrier TypeReel
Moisture Sensitivity Level (MSL)1
Output Freq Range (MHz)75 - 75
Phase Jitter Typ RMS (ps)1.196
Qty. per Reel (#)3000
Qty. per Carrier (#)0
Package Area (mm²)19.1
Pitch (mm)1.27
Pkg. Dimensions (mm)4.9 x 3.9 x 1.5
Pb (Lead) FreeYes
Pb Free Categorye3 Sn
Temp. Range (°C)-40 to 85°C
Advanced FeaturesSpread Spectrum
Core Voltage (V)2.5
Feedback InputNo
Input Freq (MHz)25 - 25
Input TypeCrystal
Inputs (#)1
Length (mm)4.9
MOQ3000
Output Banks (#)1
Output TypeLVDS
Output Voltage (V)2.5
Outputs (#)1
Pkg. TypeSOIC
Product CategoryFemtoClock, Low Jitter Clocks (<700 fs RMS)
Prog. ClockNo
Reel Size (in)13
Reference OutputNo
Requires Terms and ConditionsDoes not require acceptance of Terms and Conditions
Spread SpectrumYes
Tape & ReelYes
Thickness (mm)1.5
Width (mm)3.9

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.