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Differential-to-LVDS/0.7V Differential PCI Express Jitter Attenuator

Package Information

CAD Model: View CAD Model
Pkg. Type: TSSOP
Pkg. Code: EJG24
Lead Count (#): 24
Pkg. Dimensions (mm): 7.8 x 4.4 x 1.0
Pitch (mm): 0.65

Environmental & Export Classifications

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

Product Attributes

Lead Count (#) 24
Carrier Type Tube
Moisture Sensitivity Level (MSL) 1
Qty. per Reel (#) 0
Qty. per Carrier (#) 62
Pb (Lead) Free Yes
Pb Free Category e3 Sn
Temp. Range (°C) -40 to 85°C
Accepts Spread Spec Input Yes
App Jitter Compliance PCIe Gen1, PCIe Gen2, PCIe Gen3
Architecture Common
C-C Jitter Max P-P (ps) 35
Core Voltage (V) 3.3
Diff. Input Signaling LVPECL, LVDS, LVHSTL, SSTL, HCSL
Diff. Output Signaling HCSL, LVDS
Diff. Outputs 4
Input Freq (MHz) 98 - 128
Input Type HCSL, HSTL, LVDS, LVPECL, SSTL
Inputs (#) 1
Length (mm) 7.8
MOQ 62
Output Banks (#) 2
Output Freq Range (MHz) 98 - 160
Output Type HCSL, LVDS
Output Voltage (V) 3.3
Outputs (#) 4
Package Area (mm²) 34.3
Pitch (mm) 0.65
Pkg. Dimensions (mm) 7.8 x 4.4 x 1.0
Pkg. Type TSSOP
Prog. Clock No
Published No
Reference Output No
Requires Terms and Conditions Does not require acceptance of Terms and Conditions
Spread Spectrum Yes
Supply Voltage (V) 3.3 - 3.3
Tape & Reel No
Thickness (mm) 1
Width (mm) 4.4

Description

The 8741004I is a high performance Differential-to-LVDS/0.7V Differential Jitter Attenuator designed for use in PCI Express® systems. In some PCI Express systems, such as those found in desktop PCs, the PCI Express clocks are generated from a low bandwidth, high phase noise PLL frequency synthesizer. In these systems, a jitter attenuator may be required to attenuate high frequency random and deterministic jitter components from the PLL synthesizer and from the system board. The 8741004I has 3 PLL bandwidth modes: 200kHz, 600kHz and 2MHz. The 200kHz mode will provide maximum jitter attenuation, but with higher PLL tracking skew and spread spectrum modulation from the motherboard synthesizer may be attenuated. The 600kHz provides an intermediate bandwidth that can easily track triangular spread profiles, while providing good jitter attenuation. The 2MHz bandwidth provides the best tracking skew and will pass most spread profiles, but the jitter attenuation will not be as good as the lower bandwidth modes. Because some 2.5Gb SerDes have x20 multipliers while others have x25 multipliers, the 8741004I can be set for 1:1 mode or 5/4 multiplication mode (i.e. 100MHz input/125MHz output) using the F_SEL pins. The 8741004I uses Renesas' 3rd Generation FemtoClock® PLL technology to achieve the lowest possible phase noise. The device is packaged in a 24 Lead TSSOP package, making it ideal for use in space constrained applications such as PCI Express add-in cards.