---
title: "Clock Data Recovery Circuit"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CLOCK_DATA_RECOVERY_CIRCUIT"
  data_integrity_hash: "0dd63ef97a97e7b9e57a6e976bb1d34c"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:CLOCK_DATA_RECOVERY_CIRCUIT"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/clock-data-recovery-circuit.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/clock-data-recovery-circuit"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1.5-3.3 V input voltage, 100 MHz-10 GHz data rate, -40°C to 85°C ambient temperature"
    unit: "Gbps"
engineering_limits:
  max_safe_operating_point:
    value: 100
    unit: "ps"
    consequence: "Phase detector dead zone causing timing drift, thermal noise exceeding phase-locked loop bandwidth (typically 1/20th of data rate), voltage regulator dropout"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Power supply ripple exceeding 50 mVpp at 100 kHz"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Low-dropout regulator with &lt;10 mV ripple, π-filter with 10 μF ceramic capacitors"
  - node_2:
      trigger: "Input data jitter exceeding 0.3 UI peak-to-peak"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Jitter attenuator with &lt;1 ps RMS additive jitter, adaptive equalization with 30 dB compensation"
bom_nodes:
  phase-detector-phase-frequency-detector-pfd:
    type: "part"
    urn: "URN:CNFX:ME:PHASE_DETECTOR_PHASE_FREQUENCY_DETECTOR_PFD"
    interface_type: "physical-logic-coupled"
  charge-pump-loop-filter:
    type: "part"
    urn: "URN:CNFX:ME:CHARGE_PUMP_LOOP_FILTER"
    interface_type: "physical-logic-coupled"
  voltage-controlled-oscillator-vco:
    type: "part"
    urn: "URN:CNFX:ME:VOLTAGE_CONTROLLED_OSCILLATOR_VCO"
    interface_type: "physical-logic-coupled"
  frequency-divider:
    type: "part"
    urn: "URN:CNFX:ME:FREQUENCY_DIVIDER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015: QUALITY MANAGEMENT SYSTEMS - REQUIREMENTS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING: COMPLIANCE WITH EU EMC DIRECTIVE 2014/30/EU AND LOW VOLTAGE DIRECTIVE 2014/35/EU"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/clock-data-recovery-circuit.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "e33112fde4c4d197056e43d7b61d84fdcdd76087a45e5e9f0d248773da98f38e"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Clock Data Recovery Circuit

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

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1.5-3.3 V input voltage, 100 MHz-10 GHz data rate, -40°C to 85°C ambient temperature**. Failure boundary: **Phase-lock loss at &gt;100 ps RMS jitter, voltage drop below 1.2 V, temperature exceeding 125°C junction temperature**, Mechanism: **Phase detector dead zone causing timing drift, thermal noise exceeding phase-locked loop bandwidth (typically 1/20th of data rate), voltage regulator dropout**.

### 2.1 Analytical Physics Model
Governed by the **Joule Heating & Thermal Resistance**:

> **Primary Equation**: $P = I^2 R = \frac{V^2}{R}$  
> **Engineering Impact**: Governs heating element sizing for shrink tunnels/sealers.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| I | Current | Engineering Constant |
| R | Resistance | Engineering Constant |
| V | Voltage | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Power supply ripple exceeding 50 mVpp at 100 kHz | 8 | Phase-locked loop unlock causing bit error rate &gt;10^-3 | Low-dropout regulator with &lt;10 mV ripple, π-filter with 10 μF ceramic capacitors |
| Input data jitter exceeding 0.3 UI peak-to-peak | 8 | Clock data misalignment causing metastability in sampling flip-flops | Jitter attenuator with &lt;1 ps RMS additive jitter, adaptive equalization with 30 dB compensation |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | Gbps | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Phase Detector / Phase Frequency Detector (PFD)](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/phase-detector-phase-frequency-detector-pfd.md) `(Standalone System)`
- [Charge Pump &amp; Loop Filter](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/charge-pump-loop-filter.md) `(Standalone System)`
- [Voltage-Controlled Oscillator (VCO)](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/voltage-controlled-oscillator-vco.md) `(Standalone System)`
- [Frequency Divider](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/frequency-divider.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Wafer Prober**, **Automatic Test Equipment (ATE)**, **Cleanroom Environmental Control System**  
**Downstream Applications**: Network Switches, Optical Transceivers, High-Speed Data Acquisition Systems  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the primary function of a clock data recovery circuit?
**A**: 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.

### Q: What are the key components in a clock data recovery circuit BOM?
**A**: Key components include a Phase Detector/Phase Frequency Detector (PFD) to compare phases, a Charge Pump &amp; 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.

### Q: How does this circuit benefit high-speed communication systems?
**A**: 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.

## 6. Manufacturing Compliance
- ISO 9001:2015: QUALITY MANAGEMENT SYSTEMS - REQUIREMENTS
- CE MARKING: COMPLIANCE WITH EU EMC DIRECTIVE 2014/30/EU AND LOW VOLTAGE DIRECTIVE 2014/35/EU

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Clock Data Recovery Circuit](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/clock-data-recovery-circuit)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CLOCK_DATA_RECOVERY_CIRCUIT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d486c498
