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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-3.3V LVPECL Frequency Synthesizer

Package Information

CAD Model:View CAD Model
Pkg. Type:TSSOP
Pkg. Code:PAG48
Lead Count (#):48
Pkg. Dimensions (mm):12.5 x 6.1 x 1.0
Pitch (mm):0.5

Environmental & Export Classifications

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

Product Attributes

Lead Count (#)48
Carrier TypeReel
Moisture Sensitivity Level (MSL)1
Qty. per Reel (#)2000
Qty. per Carrier (#)0
Pb (Lead) FreeYes
Pb Free Categorye3 Sn
Temp. Range (°C)-40 to 85°C
Core Voltage (V)3.3
Feedback InputNo
Input Freq (MHz)19.44 - 25
Input TypeCrystal, LVCMOS
Inputs (#)4
Length (mm)12.5
MOQ2000
Output Banks (#)4
Output Freq Range (MHz)155.52 - 155.52, 156.25 - 156.25
Output TypeLVPECL
Output Voltage (V)3.3
Outputs (#)4
Package Area (mm²)76.3
Phase Jitter Typ RMS (ps)0.52
Pitch (mm)0.5
Pkg. Dimensions (mm)12.5 x 6.1 x 1.0
Pkg. TypeTSSOP
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
Tape & ReelYes
Thickness (mm)1
Width (mm)6.1

Description

The 843204I is a 4 output LVPECL Synthesizer optimized to generate Gigabit Ethernet and SONET reference clock frequencies. Using a 19.44MHz and 25MHz, 18pF parallel resonant crystal, 155.52MHz and 156.25MHz frequencies can be generated. The 843204I uses our FemtoClock™ low phase noise VCO technology and can achieve 1ps or lower typical RMS phase jitter. The 843204I is packaged in a 48-pin TSSOP package.