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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 Crystal-to-LVDS Frequency Synthesizer

Package Information

CAD Model:View CAD Model
Pkg. Type:PTQFP
Pkg. Code:DXG32
Lead Count (#):32
Pkg. Dimensions (mm):7.0 x 7.0 x 1.0
Pitch (mm):0.8

Environmental & Export Classifications

Moisture Sensitivity Level (MSL)3
Pb (Lead) FreeYes
ECCN (US)EAR99
HTS (US)8542.39.0090

Product Attributes

Lead Count (#)32
Carrier TypeTray
Moisture Sensitivity Level (MSL)3
Qty. per Carrier (#)250
Package Area (mm²)49
Pitch (mm)0.8
Pkg. Dimensions (mm)7.0 x 7.0 x 1.0
Qty. per Reel (#)0
Pb (Lead) FreeYes
Pb Free Categorye3 Sn
Temp. Range (°C)-40 to 85°C
C-C Jitter Max P-P (ps)25
Core Voltage (V)3.3
Feedback InputNo
Input Freq (MHz)25 - 25
Input TypeCrystal
Inputs (#)1
Length (mm)7
MOQ250
Output Banks (#)2
Output Freq Range (MHz)125 - 125, 156.25 - 156.25
Output Skew (ps)110
Output TypeLVDS
Output Voltage (V)3.3
Outputs (#)8
Phase Jitter Typ RMS (ps)0.38
Pkg. TypePTQFP
Product CategoryFemtoClock, Low Jitter Clocks (<700 fs RMS)
Prog. ClockNo
Reference OutputNo
Requires Terms and ConditionsDoes not require acceptance of Terms and Conditions
Spread SpectrumNo
Tape & ReelNo
Thickness (mm)1
Width (mm)7

Description

The 844008I-01 is an 8 output LVDS synthesizer optimized to generate GbE/10GbE reference clock frequencies and is a member of the HiPerClocks™ family of high performance clock solutions. Using a 25MHz parallel resonant crystal, the following frequencies can be generated based on the F_SEL pin: 125MHz or 156.25MHz. The 844008I-01 uses our 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting GbE/10GbE jitter requirements. The 844008I-01 is packaged in a 32-pin TQFP or 32 VFQFN packages.