---
title: "Clock and Data Recovery (CDR) Circuit"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:CLOCK_AND_DATA_RECOVERY_CDR_CIRCUIT"
  data_integrity_hash: "44fd1a799aad89ffd3cd6a1f907079e4"
  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_AND_DATA_RECOVERY_CDR_CIRCUIT"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/clock-and-data-recovery-cdr-circuit.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/clock-and-data-recovery-cdr-circuit"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1.8-3.3 V supply voltage, 1-10 Gbps data rate, -40 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, voltage-controlled oscillator (VCO) gain variation with temperature, charge pump current mismatch exceeding 5%"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Power supply noise exceeding 50 mVpp at 100 MHz"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "On-chip low-dropout regulator with 40 dB power supply rejection ratio (PSRR) at 100 MHz"
  - node_2:
      trigger: "Process variation causing 15% mismatch in charge pump current sources"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Differential charge pump architecture with common-mode feedback and 1% matching transistors"
bom_nodes:
  phase-detector:
    type: "part"
    urn: "URN:CNFX:ME:PHASE_DETECTOR"
    interface_type: "physical-logic-coupled"
  voltage-controlled-oscillator-vco:
    type: "part"
    urn: "URN:CNFX:ME:VOLTAGE_CONTROLLED_OSCILLATOR_VCO"
    interface_type: "physical-logic-coupled"
  loop-filter:
    type: "part"
    urn: "URN:CNFX:ME:LOOP_FILTER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - EMC DIRECTIVE 2014/30/EU"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/clock-and-data-recovery-cdr-circuit.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d0894745243d9a628a662d7533911218ded87ba350a73dc574cf85f9304b5fda"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Clock and Data Recovery (CDR) Circuit

## 1. Technical Definition
A circuit that extracts timing information from a data stream to synchronize receiver operations.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1.8-3.3 V supply voltage, 1-10 Gbps data rate, -40 to 85°C ambient temperature**. Failure boundary: **Phase-locked loop (PLL) loses lock at &gt;100 ps RMS jitter, supply voltage drops below 1.62 V, or temperature exceeds 125°C junction temperature**, Mechanism: **Phase detector dead zone causing timing drift, voltage-controlled oscillator (VCO) gain variation with temperature, charge pump current mismatch exceeding 5%**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Power supply noise exceeding 50 mVpp at 100 MHz | 8 | Increased bit error rate (BER) from 10^-12 to 10^-6 due to jitter accumulation | On-chip low-dropout regulator with 40 dB power supply rejection ratio (PSRR) at 100 MHz |
| Process variation causing 15% mismatch in charge pump current sources | 8 | Static phase offset of &gt;0.1 UI causing data-dependent jitter | Differential charge pump architecture with common-mode feedback and 1% matching transistors |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Phase Detector](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/phase-detector.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)`
- [Loop Filter](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/loop-filter.md) `(Standalone System)`

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

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

### Q: What is the primary function of a Clock and Data Recovery (CDR) circuit?
**A**: A CDR circuit extracts timing information from an incoming data stream to synchronize the receiver's operations, ensuring accurate data sampling and recovery in communication systems.

### Q: What are the key components in a typical CDR circuit BOM?
**A**: The essential components include a Phase Detector to compare input and output phases, a Voltage-Controlled Oscillator (VCO) to generate the clock signal, and a Loop Filter to stabilize the feedback loop.

### Q: Why is silicon commonly used for manufacturing CDR circuits?
**A**: Silicon is preferred due to its excellent semiconductor properties, scalability for high-frequency applications, cost-effectiveness, and compatibility with standard CMOS processes in electronic and optical product manufacturing.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - EMC DIRECTIVE 2014/30/EU

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

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CLOCK_AND_DATA_RECOVERY_CDR_CIRCUIT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 0ec2fa3d
