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FemtoClock VCXO-PLL Frequency Generator For Wireless Infrastructure Equipment

Package Information

Lead Count (#) 64
Pkg. Code EDG64
Pitch (mm) 0.5
Pkg. Type TQFP
Pkg. Dimensions (mm) 10.0 x 10.0 x 1.0

Environmental & Export Classifications

Moisture Sensitivity Level (MSL) 3
Pb (Lead) Free Yes
ECCN (US) NLR
HTS (US) 8542390000

Product Attributes

Lead Count (#) 64
Carrier Type Reel
Moisture Sensitivity Level (MSL) 3
Qty. per Reel (#) 500
Qty. per Carrier (#) 0
Pb (Lead) Free Yes
Pb Free Category e3 Sn
Temp. Range -40 to +85°C
Abs. Pull Range Min. (± PPM) 50
Advanced Features PLL-based Synchronous Clock
Core Voltage (V) 3.3
Feedback Input No
Input Freq (MHz) 10 - 10, 12.88 - 12.88, 15 - 15, 15.36 - 15.36, 20 - 20, 30.72 - 30.72, 61.44 - 61.44, 122.88 - 122.88
Input Type LVDS, LVPECL, LVHSTL
Inputs (#) 2
Length (mm) 10
Loop Bandwidth Range (Hz) 8.5 - 22200
MOQ 500
Output Banks (#) 3
Output Freq Range (MHz) 30.72 - 30.72, 38.4 - 38.4, 61.44 - 61.44, 76.8 - 76.8, 98.304 - 98.304, 122.88 - 122.88, 153.6 - 153.6, 245.76 - 245.76, 307.2 - 307.2, 491.52 - 491.52, 614.4 - 614.4
Output Skew (ps) 200
Output Type LVPECL
Output Voltage (V) 3.3
Outputs (#) 9
Package Area (mm²) 100.0
Period Jitter Max P-P (ps) 30.000
Phase Jitter Typ RMS (ps) 0.920
Pitch (mm) 0.5
Pkg. Dimensions (mm) 10.0 x 10.0 x 1.0
Pkg. Type TQFP
Prog. Clock No
Reel Size (in) 13
Requires Terms and Conditions Does not require acceptance of Terms and Conditions
Tape & Reel Yes
Thickness (mm) 1
Width (mm) 10
Xtal Freq (KHz) 30720 - 30720

Description

The 813078I is a PLL-based synchronous clock solution that is optimized for wireless infrastructure equipment where frequency translation and jitter attenuation are needed. The device contains two internal PLL stages that are cascaded in series. The first PLL stage attenuates the reference clock jitter by using an internal or external VCXO circuit. The internal VCXO requires the connection of an external inexpensive pullable crystal (XTAL) to the 813078I. This first PLL stage (VCXO PLL) uses external passive loop filter components which are used to optimize the PLL loop bandwidth and damping characteristics for the given application. The output of the first stage VCXO PLL is a stable and jitter-tolerant 30.72MHz reference input for the second PLL stage. The second PLL stage provides frequency translation by multiplying the output of the first stage up to 491.52MHz or 614.4MHz. The low phase noise characteristics of the VCXO-PLL clock signal are maintained by the internal FemtoClock® PLL, which requires no external components or complex programming. Two independently configurable frequency dividers translate the internal VCO signal to the desired output frequencies. All frequency translation ratios are set by device configuration pins. Supported input reference clock frequencies: 10MHz, 12.8MHz, 15MHz, 15.36MHz, 20MHz, 30.72MHz, 61.44MHz, and 122.88MHz Supported output clock frequencies: 30.72MHz, 38.4MHz, 61.44MHz, 76.8MHz, 122.88MHz, 153.6MHz, 245.76MHz, 491.52MHz, and 614.4MHz