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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:TSSOP
Pkg. Code:PGG20
Lead Count (#):20
Pkg. Dimensions (mm):6.5 x 4.4 x 1.0
Pitch (mm):0.65

Environmental & Export Classifications

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

Product Attributes

Lead Count (#)20
Carrier TypeTube
Moisture Sensitivity Level (MSL)1
Qty. per Reel (#)0
Qty. per Carrier (#)74
Pb (Lead) FreeYes
Pb Free Categorye3 Sn
Temp. Range (°C)0 to 70°C
Core Voltage (V)2.5V, 3.3V
Feedback InputNo
Input Freq (MHz)25 - 25
Input TypeCrystal, LVCMOS
Inputs (#)2
Length (mm)6.5
MOQ74
Output Banks (#)1
Output Freq Range (MHz)56 - 68, 112 - 136, 140 - 170
Output Skew (ps)20
Output TypeLVDS
Output Voltage (V)2.5V, 3.3V
Outputs (#)2
Package Area (mm²)28.6
Phase Jitter Typ RMS (ps)0.41
Pitch (mm)0.65
Pkg. Dimensions (mm)6.5 x 4.4 x 1.0
Pkg. TypeTSSOP
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)4.4

Description

The 844002-01 is a 2 output LVDS Synthesizer optimized to generate Ethernet reference clock frequencies. Using a 25MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz and 62.5MHz. The 844002-01 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Ethernet jitter requirements. The 844002-01 is packaged in a small 20-pin TSSOP package.