Industry-Verified Manufacturing Data (2026)

Clock Data Recovery (CDR) Unit

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Clock Data Recovery (CDR) Unit 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 (CDR) Unit is characterized by the integration of Phase Detector and Loop Filter. In industrial production environments, manufacturers listed on CNFX commonly emphasize Silicon (Semiconductor) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Electronic circuit that extracts timing information from data streams to synchronize receiver with transmitter.

Product Specifications

Technical details and manufacturing context for Clock Data Recovery (CDR) Unit

Definition
A Clock Data Recovery (CDR) Unit is a critical component within Input/Output Controllers responsible for recovering the clock signal embedded within an incoming serial data stream. It synchronizes the receiver's internal clock with the transmitter's clock, enabling accurate sampling and interpretation of the data bits without requiring a separate clock transmission line.
Working Principle
The CDR unit uses 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. A phase detector generates an error signal based on this comparison. A loop filter processes this error signal, which then adjusts a voltage-controlled oscillator (VCO) or a variable delay line to shift the phase/frequency of the local clock until it aligns precisely with the data transitions, effectively 'locking' onto the embedded clock.
Common Materials
Silicon (Semiconductor)
Technical Parameters
  • Maximum data rate supported by the CDR unit. (Gbps) Per Request
Components / BOM
  • Phase Detector
    Compares the phase of the incoming data signal with the phase of the internally generated clock, producing an error signal.
    Material: semiconductor
  • Loop Filter
    Filters the error signal from the phase detector to control the response and stability of the feedback loop.
    Material: semiconductor (passive/active components)
  • Voltage-Controlled Oscillator (VCO)
    Generates the local clock signal. Its frequency/phase is adjusted by the filtered error voltage to match the incoming data's clock.
    Material: semiconductor
Engineering Reasoning
0.5-10 Gbps data rate, 1-1000 ppm frequency offset tolerance, -40°C to 85°C ambient temperature
Phase-locked loop (PLL) loses lock at >1000 ppm frequency offset, jitter tolerance exceeds 0.15 UI peak-to-peak, supply voltage drops below 0.9V nominal
Design Rationale: Phase detector dead zone causing metastability, voltage-controlled oscillator (VCO) gain nonlinearity beyond 500 MHz/V, charge pump current mismatch exceeding 5%
Risk Mitigation (FMEA)
Trigger Power supply noise with >50 mVpp ripple at 100 kHz-10 MHz
Mode: Increased bit error rate (BER) from 10^-12 to 10^-6 due to jitter amplification
Strategy: On-chip low-dropout regulator with 30 dB power supply rejection ratio (PSRR) at 1 MHz
Trigger Temperature gradient >10°C/mm across die causing 0.3 ps/K VCO frequency drift
Mode: Clock-data misalignment exceeding 0.25 UI causing synchronization loss
Strategy: Distributed VCO architecture with 5-point thermal sensors and 0.1%/°C compensation loop

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Clock Data Recovery (CDR) Unit.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (electronic component, not fluidic)
other spec: Data Rate Range: 1 Mbps to 28 Gbps, Jitter Tolerance: < 0.3 UI, Power Supply: 3.3V ±10%
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) ✓ Telecom Backplane Applications
Unsuitable: High-EMI Environments without Proper Shielding (e.g., near heavy machinery or radio transmitters)
Sizing Data Required
  • Data Rate (bps)
  • Jitter Specification (UI or ps)
  • Input Signal Type (e.g., NRZ, PAM4)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Phase Lock Loop (PLL) instability
Cause: Voltage regulator noise, temperature-induced component drift, or aging capacitors affecting loop filter stability, leading to jitter accumulation and loss of clock synchronization.
Signal integrity degradation
Cause: PCB trace impedance mismatch, connector corrosion, or electromagnetic interference (EMI) from adjacent high-frequency circuits, causing bit errors and reduced data recovery accuracy.
Maintenance Indicators
  • Audible high-frequency whine or clicking from the unit indicating oscillator or power supply instability
  • Visual inspection reveals discoloration or bulging of surface-mount capacitors on the PCB, signaling imminent component failure
Engineering Tips
  • Implement periodic thermal imaging scans during operation to identify hot spots on voltage regulators and oscillators, allowing preemptive replacement before thermal runaway occurs.
  • Use conformal coating on the PCB and ensure proper EMI shielding gaskets are intact during reassembly to protect against environmental contaminants and electromagnetic interference.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 Quality Management Systems ANSI/ESD S20.20 Electrostatic Discharge Control CE Marking (EU Directive 2014/35/EU Low Voltage Directive)
Manufacturing Precision
  • Jitter Tolerance: +/- 100 ps
  • Phase Lock Range: +/- 500 ppm
Quality Inspection
  • Bit Error Rate (BER) Test
  • Jitter Transfer Function (JTF) Measurement

Factories Producing Clock Data Recovery (CDR) Unit

Verified manufacturers with capability to produce this product in China

✓ 96% Supplier Capability Match Found

P Procurement Specialist from Australia Jan 07, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Clock Data Recovery (CDR) Unit arrived with full certification."
Technical Specifications Verified
T Technical Director from Singapore Jan 04, 2026
★★★★★
"Great transparency on the Clock Data Recovery (CDR) Unit components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain."
Technical Specifications Verified
P Project Engineer from Germany Jan 01, 2026
★★★★★
"The Clock Data Recovery (CDR) Unit we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

17 sourcing managers are analyzing this specification now. Last inquiry for Clock Data Recovery (CDR) Unit from UAE (18m ago).

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Frequently Asked Questions

What is the primary function of a Clock Data Recovery (CDR) unit?

The CDR unit extracts timing information from incoming data streams to synchronize the receiver's clock with the transmitter's clock, ensuring accurate data recovery and minimizing errors in communication systems.

What are the key components in a CDR unit's Bill of Materials (BOM)?

The essential components include a Phase Detector to compare input signal phases, a Loop Filter to smooth the phase error signal, and a Voltage-Controlled Oscillator (VCO) to adjust the clock frequency based on the filtered signal.

How does a CDR unit benefit computer and optical product manufacturing?

It enables high-speed data transmission with reduced jitter and bit errors, critical for applications like fiber-optic networks, data centers, and electronic devices, improving reliability and performance in optical and electronic systems.

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.

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