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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.

3D illustration featuring top and bottom views of VFQFPN IC chip package with 72 lead count.

9FG1904BK-1LFT

Obsolete
DB1900GS-Derative Frequency Gearing Clock for Intel CPU, PCIe Gen2 & Fully Buffered DIMM Clocks
9FG1904B-1 DatasheetLearn more about 9FG1904-1

Package Information

CAD Model:View CAD Model
Pkg. Type:VFQFPN
Pkg. Code:NLG72
Lead Count (#):72
Pkg. Dimensions (mm):10.0 x 10.0 x 1.0
Pitch (mm):0.5

Environmental & Export Classifications

Pb (Lead) FreeYes
ECCN (US)EAR99
HTS (US)8542.39.0090
Moisture Sensitivity Level (MSL)3

Product Attributes

Pkg. TypeVFQFPN
Lead Count (#)72
Pb (Lead) FreeYes
Carrier TypeReel
Accepts Spread Spec InputYes
App Jitter CompliancePCIe Gen1, PCIe Gen2, FBD
Chipset ManufacturerIntel
Chipset NameSeaburg, Tylersburg
Clock Spec.DB1900GS
Core Voltage (V)3.3
Diff. Input SignalingHCSL
Diff. Output SignalingHCSL
Input Freq (MHz)100 - 133.33
Length (mm)10
MOQ2500
Moisture Sensitivity Level (MSL)3
Multiplication Value1, 8, 12
Multiply/Divide Value1, 8, 10, 12
Output Banks (#)2
Output Freq Range (MHz)66.67 - 400
Output Skew (ps)150
Output Voltage (V)0.8
Outputs (#)4
Package Area (mm²)100
Pb Free Categorye3 Sn
Pitch (mm)0.5
Pkg. Dimensions (mm)10.0 x 10.0 x 1.0
Platform NameCranberry Lake, Stoakley, Thurley
Qty. per Carrier (#)0
Qty. per Reel (#)2500
Reel Size (in)13
Requires Terms and ConditionsDoes not require acceptance of Terms and Conditions
Supply Voltage (V)3.3 - 3.3
Tape & ReelYes
Temp. Range (°C)0 to 70°C
Thickness (mm)1
Width (mm)10

Description

The IDT9FG1904B-1 follows the Intel DB1900GS Differential Buffer Specification, except for the output groupings. This buffer provides 19 output clocks for CPU Host Bus, PCI-Express, or Fully Buffered DIMM applications. The outputs are configured with two groups. Both groups, DIF_(14:0) and DIF_(18:15) can be equal to or have a gear ratio to the input clock. A differential CPU clock from a CK410B+ main clock generator, such as the IDT932S421, drives the IDT9FG1904B-1. The IDT9FG1904B-1 can provide outputs up to 400MHz.

Learn more about 9FG1904-1