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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-CML Clock Generator

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 TypeTray
Moisture Sensitivity Level (MSL)3
Qty. per Reel (#)0
Qty. per Carrier (#)490
Pb (Lead) FreeYes
Pb Free Categorye3 Sn
Temp. Range (°C)-40 to 85°C
Core Voltage (V)2.5V, 3.3V
Feedback InputNo
Input Freq (MHz)25 - 25
Input TypeCrystal, LVCMOS
Inputs (#)2
Length (mm)5
MOQ2940
Output Banks (#)2
Output Freq Range (MHz)62.5 - 62.5, 125 - 125, 156.25 - 156.25, 312.5 - 312.5
Output Skew (ps)100
Output TypeCML
Output Voltage (V)2.5V, 3.3V
Outputs (#)4
Package Area (mm²)25
Phase Jitter Typ RMS (ps)0.486
Pitch (mm)0.5
Pkg. Dimensions (mm)5.0 x 5.0 x 0.9
Pkg. TypeVFQFPN
Product CategoryGeneral Purpose Clocks
Prog. ClockNo
Reference OutputNo
Requires Terms and ConditionsDoes not require acceptance of Terms and Conditions
Spread SpectrumNo
Tape & ReelNo
Thickness (mm)0.9
Width (mm)5

Description

The ICS845264I is a 3.3V, 2.5V CML clock generator designed for Ethernet applications. The device synthesizes four clock frequencies on two separately selectable output banks. Each bank has either a 62.5MHz, 125MHz, 156.25MHz, or 312.5MHz clock signal with excellent phase jitter performance. Each clock frequency is distributed to two low-skew differential CML output banks with a total of four outputs. The device is suitable for driving the reference clocks of Ethernet PHYs. It supports 3.3V and 2.5V voltage supply and is packaged in a small, lead-free (RoHS 6) 32-lead VFQFN package. The extended temperature range supports telecommunication, wireless infrastructure, and networking end equipment requirements.