Editorial Technical Reference

Clock Management Unit

This page explains how Clock Management Unit is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A specialized electronic component within a Protocol Engine Core that generates, distributes, and synchronizes clock signals for timing operations.

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for Clock Management Unit

Definition
The Clock Management Unit is a critical sub-system within a Protocol Engine Core responsible for generating precise clock signals, distributing them to various functional blocks, and ensuring synchronization across the entire protocol processing pipeline. It manages clock domains, handles frequency synthesis, and provides timing references for data sampling, state machine operation, and interface coordination. This component is designed for integration into electronic systems that require reliable timing, such as network processors, communication controllers, and data acquisition systems. The unit typically accepts a reference oscillator input and uses phase-locked loop (PLL) or delay-locked loop (DLL) techniques to produce multiple clock outputs with controlled frequencies and phases. These outputs are distributed through a clock tree with minimized skew to ensure that all parts of the system operate on a consistent time base. The unit also includes synchronization circuits to handle clock domain crossing and prevent metastability, which is essential for robust operation in high-speed digital designs. The Clock Management Unit is available in a compact QFN-32 package (5×5 mm, 0.5 mm pitch) and operates over an industrial temperature range of -40°C to 85°C, making it suitable for demanding environments. It supports an input voltage range of 1.8–3.3 V and can generate output clock frequencies from 10 to 200 MHz, programmable via the PLL. Frequency stability is maintained within ±50 ppm over temperature and voltage, and phase jitter is kept at or below 1 ps RMS (integrated over 12 kHz–20 MHz). The device consumes no more than 100 mW at 3.3 V and 200 MHz, with a supply current of 5–20 mA at maximum output frequency. The output duty cycle is 45–55% at 50 MHz. The unit is designed to meet ESD tolerance of ±2000 V (HBM) per IEC 61000-4-2. For procurement, it is essential to verify model-specific parameters and compliance with the listed standards (e.g., IEC 60068-2-1/2 for temperature testing, JEDEC MO-220 for packaging) with the legal manufacturer or supplier, as these are reference values and not guarantees of certification.
Working Principle
The Clock Management Unit uses a phase-locked loop (PLL) or delay-locked loop (DLL) to generate stable clock signals from a reference oscillator. It then divides, multiplies, or phase-shifts these signals to create multiple clock domains with specific frequencies and phases required by different protocol engine components. Clock distribution networks ensure minimal skew, while synchronization circuits handle domain crossing and metastability prevention.
Common Materials
Silicon, Copper, Dielectric materials
Technical Parameters
ParameterTypical rangeNotes & selection driver
Input Voltage1.8–3.3 VCore logic supply range
Output Clock Frequency10–200 MHzProgrammable via PLL
Frequency Stability±50 ppmOver temperature and voltage
Phase Jitter≤1 ps RMSIntegrated over 12 kHz–20 MHz
Operating Temperature-40–85 °CIndustrial grade
Supply Current5–20 mAAt max output frequency
Output Duty Cycle45–55 %At 50 MHz
Package TypeQFN-325×5 mm, 0.5 mm pitchJEDEC MO-220
ESD Tolerance±2000 VHBM modelIEC 61000-4-2
Power Dissipation≤100 mWAt 3.3 V, 200 MHz

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Phase-Locked Loop
    Generates stable output clock signals synchronized to a reference input
    Material: Silicon
  • Clock Distribution Network Part
    Routes clock signals to various destinations with minimal skew and delay
    Material: Copper interconnects
  • Frequency Divider
    Divides the input clock frequency to produce lower frequency outputs
    Material: Silicon transistors
  • Clock Gating Circuit Part
    Controls clock signal distribution to enable power saving modes
    Material: CMOS logic gates
  • Synchronization Circuit
    Carries signals safely across clock domains and keeps metastability out.

Application & selection

Application Fit & Sizing Matrix

Operational Limits
voltage: 1.0V to 3.3V
temperature: -40°C to +125°C
frequency range: 1MHz to 500MHz
power consumption: < 100mW typical
jitter performance: < 1ps RMS
Media Compatibility
✓ FPGA/ASIC digital systems ✓ High-speed serial communication protocols ✓ Precision timing reference circuits
Unsuitable: High-voltage power electronics environments
Sizing Data Required
  • Required clock frequency range
  • Number of clock domains needed
  • Jitter tolerance specification

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Timing Signal Drift
Cause: Aging of quartz crystal oscillator due to thermal cycling, mechanical stress, or contamination from environmental factors, leading to frequency instability.
Power Supply Degradation
Cause: Electrolytic capacitor failure from prolonged operation at high temperatures, causing voltage regulation issues and potential clock signal loss.
Maintenance Indicators
  • Inconsistent or erratic system timing behavior (e.g., irregular clock pulses, timing errors in dependent systems)
  • Audible high-frequency whine or buzzing from the unit, indicating capacitor or oscillator instability
Engineering Tips
  • Implement regular thermal management monitoring and ensure operating temperatures remain within manufacturer specifications to reduce oscillator aging and capacitor degradation.
  • Schedule preventive replacement of electrolytic capacitors and perform periodic calibration checks using precision frequency counters to detect early timing drift.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ANSI/ASME B46.1-2019 Surface Texture DIN 862:2016-08 Clocks and Watches - Terms and Definitions

Quoted from the published standard.

Manufacturing Precision
  • Gear Tooth Profile: +/-0.005mm
  • Shaft Runout: 0.02mm TIR
Quality Inspection
  • Functional Timing Accuracy Test
  • Coordinate Measuring Machine (CMM) Dimensional Verification
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Clock Management Unit

Manufacturer profiles associated with Clock Management Unit.

Sourcing Clock Management Unit from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.

Buyer enquiry

Request manufacturing insight for Clock Management Unit

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes
Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here
We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman
CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What to include
Share your product specifications, quantity, destination and target delivery date.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at [email protected].

Frequently Asked Questions

What is the typical input voltage range for this Clock Management Unit?

The input voltage range is 1.8–3.3 V, as listed in the parameters. This is a reference range; the exact operating conditions should be confirmed with the manufacturer for the specific model.

Can the output clock frequency be adjusted?

Yes, the output clock frequency is programmable via the PLL and can range from 10 to 200 MHz. The actual achievable frequencies depend on the configuration and must be verified with the manufacturer.

What is the operating temperature range?

The operating temperature range is -40°C to 85°C, which is industrial grade. This is based on the parameters and should be confirmed for the specific part.

What standards are referenced for this component?

The parameters reference IEC 60068-2-1/2 for temperature testing, JEDEC MO-220 for the package, and IEC 61000-4-2 for ESD tolerance. These are verification references and do not imply certification; always check with the supplier.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

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

Protocol Engine Core
View system integration details
Protocol Converter IC
View system integration details
Digital Interface Logic
View system integration details
I/O Interface Block
View system integration details
Interface Logic Core
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

Need to Manufacture Clock Management Unit?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
XY Positioning Stage
Last Product
Get QuotesChat