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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/LVCMOS-to-LVDS/LVCMOS Frequency Synthesizer

Package Information

CAD Model:View CAD Model
Pkg. Type:VFQFPN
Pkg. Code:NLG32
Lead Count (#):32
Pkg. Dimensions (mm):5.0 x 5.0 x 0.9
Pitch (mm):0.5

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 TypeReel
Moisture Sensitivity Level (MSL)3
Qty. per Reel (#)2500
Qty. per Carrier (#)0
Pb (Lead) FreeYes
Pb Free Categorye3 Sn
Temp. Range (°C)0 to 70°C
Core Voltage (V)3.3
Diff. Input Signaling3.3
Divider Value5
Feedback Divider25 - 25
Feedback InputNo
FunctionFemtoClocks
Input Freq (MHz)25 - 25
Input TypeCrystal
Inputs (#)1
Length (mm)5
MOQ2500
Operating Freq125
Output Banks (#)2
Output Freq Range (MHz)125 - 125
Output SignalingLVDS, LVCMOS
Output TypeLVDS, LVCMOS
Output Voltage (V)3.3
Outputs (#)8
Package Area (mm²)25
Period Jitter Typ P-P (ps)8.57
Phase Jitter Typ RMS (ps)0.278
Pitch (mm)0.5
Pkg. Dimensions (mm)5.0 x 5.0 x 0.9
Pkg. TypeVFQFPN
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 SpectrumNo
Supply Voltage (V)3.3 - 3.3
Tape & ReelYes
Thickness (mm)0.9
VCO Max Freq (MHz)625
VCO Min Freq (MHz)625
Width (mm)5
Xtal Freq (KHz)25 - 25
Xtal Inputs (#)1

Description

The 844S0258-07 is an eight output synthesizer optimized to generate Gigabit and 10 Gigabit Ethernet clocks. Using a 25MHz, 18pF parallel resonant crystal, the device will generate 125MHz clocks with mixed LVDS and LVCMOS/ LVTTL output levels. 844S0258-07 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical RMS phase jitter, easily meeting Ethernet jitter requirements. 844S0258-07 is packaged in a small, 32-pin VFQFN package that is optimum for applications with space limitations.