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Product details

Parameters

Function Differential Additive RMS jitter (Typ) (fs) 89 Output frequency (Max) (MHz) 2000 Number of outputs 8 Output supply voltage (V) 2.5, 3.3 Core supply voltage (V) 2.5, 3.3 Output skew (ps) 15 Features 2:8 fanout Operating temperature range (C) -40 to 85 Rating Catalog Output type LVPECL Input type LVCMOS, LVDS, LVPECL open-in-new Find other Clock buffers

Package | Pins | Size

VQFN (RHD) 28 25 mm² 5 x 5 open-in-new Find other Clock buffers

Features

  • Dual 1:4 Differential Buffer
  • Two Clock Inputs
  • Universal Inputs Can Accept LVPECL,
    LVDS, LVCMOS/LVTTL
  • Eight LVPECL Outputs
  • Maximum Clock Frequency: 2 GHz
  • Maximum Core Current Consumption: 78 mA
  • Very Low Additive Jitter: <100 fs,
    RMS in 10-kHz to 20-MHz Offset Range
  • 2.375-V to 3.6-V Device Power Supply
  • Maximum Propagation Delay: 450 ps
  • Maximum 15 ps Within Bank Output Skew
  • LVPECL Reference Voltage, VAC_REF,
    Available for Capacitive-Coupled Inputs
  • Industrial Temperature Range: –40°C to +85°C
  • Supports 105°C PCB Temperature (Measured with a Thermal Pad)
  • Available in 5-mm × 5-mm, 28-Pin VQFN (RHD) Package
  • ESD Protection Exceeds 2000 V (HBM)
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Description

The CDCLVP2104 is a highly versatile, low additive jitter buffer that can generate eight copies of LVPECL clock outputs from two LVPECL, LVDS, or LVCMOS inputs for a variety of communication applications. It has a maximum clock frequency up to 2 GHz. Each buffer block consists of one input that feeds two LVPECL outputs. The overall additive jitter performance is less than 0.1 ps, RMS from 10 kHz to 20 MHz, and overall output skew is as low as 15 ps, making the device a perfect choice for use in demanding applications.

The CDCLVP2104 clock buffer distributes two clock inputs (IN0, IN1) to eight pairs of differential LVPECL clock outputs (OUT0, OUT7) with minimum skew for clock distribution. Each buffer block consists of one input that feeds two LVPECL clock outputs. The inputs can be LVPECL, LVDS, or LVCMOS/LVTTL.

The CDCLVP2104 is specifically designed for driving 50-Ω transmission lines. When driving the inputs in single-ended mode, the LVPECL bias voltage (VAC_REF) must be applied to the unused negative input pin. However, for high-speed performance up to 2 GHz, differential mode is strongly recommended.

The CDCLVP2104 is characterized for operation from &3150;40°C to +85°C and is available in a 5-mm × 5-mm, QFN-28 package.

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Technical documentation

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Type Title Date
* Data sheet CDCLVP2104 Eight-LVPECL Output, High-Performance Clock Buffer datasheet (Rev. B) Oct. 25, 2013
User guide CDCLVP2104 User's Guide Oct. 21, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
149
Description
The CDCLVP2104 is a high-performance, low additive phase noise clock buffer. It has two universal input buffers that support either single-ended or differential clock inputs. Each input feeds a bank of four LVPECL outputs. The device also features on-chip bias generators that can provide the LVPECL (...)
Features
  • Easy-to-use evaluation board to fan out low phase noise clocks
  • Easy device setup
  • Fast configuration
  • Control pins configurable through jumpers
  • Board powered at +2.5-V/+3.3-V
  • Single-ended or differential input clocks
  • CDCLVP2104 supports eight LVPECL outputs; CDCLVP2104EVM supports four LVPECL outputs

Design tools & simulation

SIMULATION MODEL Download
SLLM056B.ZIP (40 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
DESIGN TOOL Download
Clock tree architect programming software
CLOCK-TREE-ARCHITECT Clock tree architect is a clock tree synthesis tool that streamlines your design process by generating clock tree solutions based on your system requirements. The tool pulls data from an extensive database of clocking products to generate a system-level multi-chip clocking solution.
Features
  • Accepts customer specific design requirements such as input frequencies, output frequencies, clock formats and clock counts
  • Generates clock trees by taking into account a variety of advanced specifications, such as noise floor and phase determinism requirements
  • Presents clear and intuitive block (...)

CAD/CAE symbols

Package Pins Download
VQFN (RHD) 28 View options

Ordering & quality

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