Structured Manufacturing Data (2026)

Clock Data Recovery Circuit

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Clock Data Recovery Circuit used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Clock Data Recovery Circuit is characterized by the integration of Phase Detector / Phase Frequency Detector (PFD) and Charge Pump & Loop Filter. In industrial production environments, manufacturers listed on CNFX commonly emphasize Silicon (Semiconductor substrate) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A circuit that extracts and reconstructs a clock signal from a serial data stream, enabling synchronous data sampling in communication systems.

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Product Specifications

Technical details and manufacturing context for Clock Data Recovery Circuit

Definition
A critical component within Analog-to-Digital Converters (ADCs) and Deserializers, the Clock Data Recovery (CDR) circuit is responsible for generating a stable, synchronized clock signal directly from the incoming high-speed serial data stream. This recovered clock is essential for accurately sampling the data bits at the optimal point in time, compensating for timing jitter, frequency drift, and phase misalignment between the transmitter and receiver, thereby ensuring reliable data transmission and conversion.
Working Principle
The circuit typically employs a phase-locked loop (PLL) or delay-locked loop (DLL) architecture. It compares the phase of the incoming data transitions with the phase of a locally generated clock from a voltage-controlled oscillator (VCO). A phase detector generates an error signal proportional to the phase difference. This error signal is filtered and used to adjust the VCO's frequency/phase, locking it to the average frequency and phase of the incoming data stream. Once locked, the recovered clock is used to trigger the sampling of the data bits in the subsequent data path.
Common Materials
Silicon (Semiconductor substrate), Copper (Interconnects), Dielectric materials (Insulation)
Technical Parameters
  • Maximum data rate the CDR circuit can reliably recover a clock from. (Gbps) Per Request
Components / BOM
  • Phase Detector / Phase Frequency Detector (PFD)
    Compares the phase (and sometimes frequency) of the incoming data transitions with the feedback clock from the VCO and generates an error signal.
    Material: Semiconductor (CMOS/BiCMOS transistors)
  • Charge Pump & Loop Filter
    Converts the phase detector's digital error signals into an analog control voltage. The loop filter smooths this voltage to set the dynamics (bandwidth, stability) of the PLL.
    Material: Semiconductor (transistors, capacitors, resistors)
  • Voltage-Controlled Oscillator (VCO)
    Generates the local clock signal. Its oscillation frequency is controlled by the voltage from the loop filter.
    Material: Semiconductor (inductors, varactors, transistors)
  • Frequency Divider
    Divides the high-frequency VCO output down to a lower frequency for comparison in the phase detector, setting the multiplication ratio of the PLL.
    Material: Semiconductor (digital logic gates)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Clock Data Recovery Circuit.

serial data stream clock recovery circuit phase locked loop clock data recovery VCO-based clock extraction circuit high-speed communication clock synchronization PFD charge pump clock recovery IC

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Analog-to-Digital Converter (ADC) / Deserializer
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (solid-state electronic component)
other spec: Data rate range: 1 Mbps to 10 Gbps, Jitter tolerance: < 0.1 UI, Power supply: 1.8V to 3.3V
temperature: -40°C to +85°C (industrial grade), -40°C to +125°C (extended)
Media Compatibility
✓ Fiber optic communication systems ✓ High-speed serial data links (e.g., PCIe, SATA) ✓ Telecommunication backplane interfaces
Unsuitable: High electromagnetic interference (EMI) environments without proper shielding
Sizing Data Required
  • Data rate (bps)
  • Jitter specification (UI or ps)
  • Input signal amplitude (mVpp)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Clock Jitter Degradation
Cause: Power supply noise, temperature fluctuations, or aging of voltage-controlled oscillator (VCO) components leading to timing instability.
Phase-Locked Loop (PLL) Lock Loss
Cause: Signal integrity issues (e.g., electromagnetic interference, poor PCB layout), reference clock drift, or loop filter component failure disrupting synchronization.
Maintenance Indicators
  • Increased bit error rate (BER) in data transmission, indicating timing misalignment
  • Abnormal heat emission from the PLL or VCO section, suggesting overcurrent or component stress
Engineering Tips
  • Implement robust power supply filtering and decoupling near the CDR circuit to minimize noise-induced jitter
  • Regularly monitor and calibrate the reference clock source and maintain stable operating temperatures to prevent thermal drift

Compliance & Manufacturing Standards

Reference Standards
IEC 60747-14-1: Semiconductor devices - Part 14-1: Semiconductor sensors - Clock and data recovery circuits ISO 9001:2015: Quality management systems - Requirements CE marking: Compliance with EU EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU
Manufacturing Precision
  • Jitter tolerance: +/- 0.1 UI (Unit Interval) at specified data rates
  • Frequency accuracy: +/- 100 ppm (parts per million) over operating temperature range
Quality Inspection
  • Bit Error Rate (BER) test: Verifies signal integrity and recovery accuracy under various conditions
  • Jitter transfer function measurement: Ensures compliance with jitter tolerance and generation specifications

Factories Producing Clock Data Recovery Circuit

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of a clock data recovery circuit?

The primary function is to extract and reconstruct a stable clock signal from an incoming serial data stream, enabling synchronous data sampling and ensuring reliable data recovery in communication systems without requiring a separate clock transmission channel.

What are the key components in a clock data recovery circuit BOM?

Key components include a Phase Detector/Phase Frequency Detector (PFD) to compare phases, a Charge Pump & Loop Filter to generate control voltage, a Voltage-Controlled Oscillator (VCO) to produce the output clock, and a Frequency Divider for feedback loop stability and frequency adjustment.

How does this circuit benefit high-speed communication systems?

It enables precise synchronization between transmitter and receiver clocks, reduces timing jitter, improves data integrity in high-speed serial links (like Ethernet, PCIe, or fiber optics), and minimizes the need for external clock sources, making systems more efficient and reliable.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Computer, Electronic and Optical Product Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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