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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-LVCMOS/LVTTL Clock Generator

Package Information

CAD Model:View CAD Model
Pkg. Type:TSSOP
Pkg. Code:PGG8
Lead Count (#):8
Pkg. Dimensions (mm):3.1 x 4.4 x 1.0
Pitch (mm):0.65

Environmental & Export Classifications

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

Product Attributes

Pkg. TypeTSSOP
Lead Count (#)8
Pb (Lead) FreeYes
Carrier TypeTube
Core Voltage (V)3.3
Feedback InputNo
Input Freq (MHz)17.5 - 21.25
Input TypeCrystal
Inputs (#)1
Length (mm)3.1
MOQ192
Moisture Sensitivity Level (MSL)1
Output Banks (#)1
Output Freq Range (MHz)70 - 170
Output TypeLVCMOS
Output Voltage (V)3.3
Outputs (#)1
Package Area (mm²)13.6
Pb Free Categorye3 Sn
Phase Jitter Typ RMS (ps)0.45
Pitch (mm)0.65
Pkg. Dimensions (mm)3.1 x 4.4 x 1.0
Prog. ClockNo
Qty. per Carrier (#)96
Qty. per Reel (#)0
Requires Terms and ConditionsDoes not require acceptance of Terms and Conditions
Tape & ReelNo
Temp. Range (°C)0 to 70°C
Thickness (mm)1
Width (mm)4.4

Description

The 840051 is a Gigabit Ethernet Clock Generator and a member of the family of high performance devices from IDT. The 840051 can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The 840051 has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.