Industry-Verified Manufacturing Data (2026)

Clock Data Recovery Unit

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Clock Data Recovery 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 Unit is characterized by the integration of Phase Detector and 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 the clock signal from a serial data stream, enabling synchronous data recovery in serializer/deserializer systems.

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Product Specifications

Technical details and manufacturing context for Clock Data Recovery Unit

Definition
The Clock Data Recovery Unit is a critical component within Data Serializer/Deserializer (SerDes) systems. Its primary function is to recover a stable, low-jitter clock signal directly from the incoming serial data stream, which lacks a separate clock line. This recovered clock is then used to sample the data at the optimal point in each bit period, ensuring accurate data reconstruction and synchronization between transmitter and receiver.
Working Principle
It operates by using a phase-locked loop (PLL) or delay-locked loop (DLL) architecture. The circuit compares the phase of a voltage-controlled oscillator (VCO) output with transitions in the incoming data stream. A phase detector generates an error signal proportional to the phase difference. This error signal is filtered and used to adjust the VCO frequency and phase until it locks onto the data rate, thereby regenerating a clean clock signal synchronized to the incoming data.
Common Materials
Silicon (Semiconductor Substrate)
Technical Parameters
  • Maximum data rate supported for clock recovery. (Gbps) Standard Spec
Components / BOM
  • Phase Detector
    Compares the phase of the incoming data edges with the internally generated clock to produce an error signal.
    Material: Semiconductor (CMOS transistors)
  • Loop Filter
    Filters the phase error signal to control the dynamics of the feedback loop and reduce noise.
    Material: On-chip resistors and capacitors
  • Voltage-Controlled Oscillator (VCO)
    Generates the clock signal; its frequency is adjusted by the filtered error voltage from the loop filter.
    Material: Semiconductor (CMOS/LC components)
Engineering Reasoning
1.8-3.3 V input voltage, 0.1-6.4 Gbps data rate, -40 to 85°C ambient temperature
Phase-locked loop loses lock at >200 ps peak-to-peak jitter, input voltage drops below 1.62 V, or temperature exceeds 125°C junction temperature
Design Rationale: Phase detector saturation due to excessive input jitter exceeding PLL bandwidth (typically 0.1-10 MHz), causing voltage-controlled oscillator frequency drift beyond capture range; thermal runaway in CMOS transistors at high temperatures increases leakage current, reducing signal-to-noise ratio below 20 dB
Risk Mitigation (FMEA)
Trigger Power supply ripple exceeding 50 mVpp at 100 kHz-10 MHz frequencies
Mode: Phase-locked loop loses synchronization, causing bit error rate to exceed 10^-12
Strategy: Integrated low-dropout regulator with 60 dB power supply rejection ratio and 100 pF on-chip decoupling capacitors
Trigger Electrostatic discharge event of 2 kV human body model on data input pins
Mode: Gate oxide breakdown in input buffer transistors, increasing input capacitance beyond 2 pF
Strategy: Dual-diode ESD protection cells with 5 Ω series resistors and 100 fF shunt capacitors at all I/O pads

Industry Taxonomies & Aliases

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

clock data recovery unit for SerDes systems silicon-based clock signal extraction circuit phase detector loop filter VCO CDR synchronous data recovery in serializer/deserializer clock reconstruction from serial data stream

Applied To / Applications

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

Data Serializer/Deserializer
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
voltage: 1.8V to 3.3V supply range
data rate: 1 Mbps to 10 Gbps
temperature: -40°C to +85°C (industrial grade)
jitter tolerance: 0.1 UI to 0.5 UI
power consumption: 10 mW to 500 mW
Media Compatibility
✓ NRZ (Non-Return-to-Zero) serial data streams ✓ PAM-4 (Pulse Amplitude Modulation) encoded signals ✓ Optical transceiver electrical interfaces
Unsuitable: High-voltage power line communication environments (>50V)
Sizing Data Required
  • Data rate (bps)
  • Jitter specification (UI or ps)
  • Reference clock frequency (MHz)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Jitter accumulation and timing drift
Cause: Degradation of phase-locked loop (PLL) components (e.g., voltage-controlled oscillator aging, charge pump leakage) or power supply noise affecting reference clock stability
Signal lock failure or loss of synchronization
Cause: Clock signal amplitude attenuation due to transmission line impedance mismatch, electromagnetic interference (EMI), or degradation of input buffer circuitry
Maintenance Indicators
  • Increased bit error rate (BER) or data corruption in downstream systems
  • Audible high-frequency whine or visible overheating of the CDR unit enclosure
Engineering Tips
  • Implement periodic calibration of PLL parameters using automated test equipment to compensate for component aging and environmental drift
  • Maintain strict EMI shielding and power supply decoupling protocols, including regular inspection of filter capacitors and grounding integrity

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ANSI/ESD S20.20 - Electrostatic Discharge Control Program IEC 61000-4-2 - Electromagnetic Compatibility (Immunity to ESD)
Manufacturing Precision
  • Jitter Tolerance: +/- 100 ps peak-to-peak
  • Phase Lock Range: +/- 500 ppm
Quality Inspection
  • Bit Error Rate Test (BERT)
  • Jitter Tolerance Test

Factories Producing Clock Data Recovery Unit

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

T Technical Director from United Arab Emirates Jan 14, 2026
★★★★★
"The technical documentation for this Clock Data Recovery Unit is very thorough, especially regarding technical reliability."
Technical Specifications Verified
P Project Engineer from Australia Jan 11, 2026
★★★★☆
"Reliable performance in harsh Computer, Electronic and Optical Product Manufacturing environments. No issues with the Clock Data Recovery Unit so far. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Singapore Jan 08, 2026
★★★★★
"Testing the Clock Data Recovery Unit now; the technical reliability results are within 1% of the laboratory datasheet."
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.”

12 sourcing managers are analyzing this specification now. Last inquiry for Clock Data Recovery Unit from Vietnam (51m ago).

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Frequently Asked Questions

What is the primary function of a Clock Data Recovery Unit?

The Clock Data Recovery Unit extracts and reconstructs the clock signal from incoming serial data streams, enabling synchronous data recovery in serializer/deserializer (SerDes) systems for accurate data timing.

What are the key components in this Clock Data Recovery Unit?

The unit consists of three main components: a Phase Detector to compare input signal phases, a Loop Filter to smooth control signals, and a Voltage-Controlled Oscillator (VCO) to generate the recovered clock signal.

What applications use Clock Data Recovery Units?

These units are essential in high-speed communication systems including fiber optics, network switches, data centers, telecommunications equipment, and any system requiring precise clock synchronization from serial data transmission.

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 Specifications verified by CNFX Industrial Index (v2.6.03) for Computer, Electronic and Optical Product Manufacturing sector.

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