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MK1491-09FILN
MK1491-09FILN
| Part Number | MK1491-09FILN |
|---|---|
| Manufacturer | Renesas Electronics (Formerly IDT / MicroClock) |
| Category | Integrated Circuits (ICs) > Clock/Timing – Clock Generators, PLLs, Frequency Synthesizers |
| Description | High-performance, low-jitter clock synthesizer explicitly designed for AMD processor-based motherboards, providing reference clocks, PCI, and memory timing control with integrated Spread Spectrum technology. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The MK1491-09FILN is a high-precision integrated clock synthesizer from Renesas (formerly IDT/MicroClock), customized for AMD processor motherboards.
Powered by a 14.31818 MHz crystal input, its built-in low-jitter PLL generates CPU, PCI and 48MHz USB synchronous clocks. It features programmable spread spectrum modulation to cut EMI and meet FCC standards.
Packaged in compact 28-pin SSOP, this industrial-grade (-40°C ~ +85°C) IC saves PCB space and delivers stable timing for industrial motherboards, embedded SBCs and harsh-environment automation devices.
Core Advantages
Optimized AMD Platform Compatibility
Provides factory-calibrated frequency profiles and timing control specifically matching AMD processor requirements, avoiding multi-component oscillator trees and tracking mismatches on complex logic boards.
Integrated Spread Spectrum Regulation
Features onboard clock dithering algorithms that smooth out peak frequency spikes, drastically reducing Electro-Magnetic Interference (EMI) and helping custom hardware layouts pass system-level certification smoothly.
Industrial-Grade Reliability
Fully rated to perform within a wide thermal spectrum from -40°C up to +85°C, ensuring clock signal stability, low frequency drift, and long-term timing synchronization in challenging environments.
Consolidated Monolithic Architecture
Replaces multiple discrete crystals and clock buffers with a single 28-pin SSOP IC footprint, freeing up critical PCB space and lowering total bill-of-materials (BOM) overhead.
Key Specifications
| Brand | Renesas Electronics |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free Standard Packaging (Green Compound) |
| EDA/CAD Model | 3D Model & PCB Footprint Available upon request |
| Warranty | 1-Year Standard Factory Warranty |
| Package / Case | SSOP-28 (209 mil) |
| Mounting Type | Surface Mount Technology (SMD/SMT) |
| Surface Marking / Silkscreen | MK1491-09FILN Marking |
| Input Frequency Requirement | 14.31818 MHz External Crystal or Clock Source Input |
| Output Clock Channels | Multiple Synchronous Rails (Includes dedicated CPU, PCI, REF, and 48MHz USB lines) |
| PLL Core Architecture | Integrated Low-Jitter Phase-Locked Loop Synthesizer with Spread Spectrum capabilities |
| EMI Mitigation Profile | Center or Down-Spread Spectrum Modulation options |
| Operational Voltage Supply ($V_{DD}$) | +3.3V ±5% Main Digital Rail Configuration |
| Output Drive Capacity | Standard CMOS Output Driver Levels |
| Operating Temperature Range | -40°C to +85°C (Industrial Temperature Grade Range Boundary) |
Typical Applications
- Industrial Motherboards, Rugged Embedded Computational Systems, and Single Board Computers (SBCs)
- Automotive In-Vehicle Computers, Fleet Telematics Processing Backplanes, and Infotainment Mainboards
- Aerospace Communication Subsystems, Military COTS Equipment Controllers, and Telecommunication Switches
- Industrial Automation Control Cabinets, High-Performance PLCs, and Factory Floor Automation Gateways
- Medical Diagnostic Systems, Imaging Consoles, and Secure Multi-Axis Robotic Control Terminals
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: Is your currently available stock of the MK1491-09FILN clock generator 100% genuine and original?
A: Yes, we guarantee that all MK1491-09FILN components in our warehouse are 100% brand-new, original factory stock from Renesas Electronics. Every batch is tracked, verified, and shipped inside standard moisture-barrier packaging with strict anti-static ESD shielding measures.
Q2: What is the exact hardware performance tier indicated by the “I” and “LN” suffix codes inside the part identifier?
A: The “I” explicit designator certifies that the chip is fully rated and physically optimized for the true Industrial temperature spectrum (-40°C to +85°C). The “LN” suffix indicates a lead-free, RoHS-compliant package utilizing green molding compounds standard for modern pick-and-place lines.
Q3: How exactly does the Spread Spectrum feature inside this chip help pass EMI compliance tests?
A: Instead of generating clock cycles at a fixed, static peak frequency—which causes high-amplitude electromagnetic radiating energy spikes—the integrated Spread Spectrum circuitry slightly modulates the clock frequency back and forth. This shifts and broadens the spectral energy across a wider band, reducing peak energy spikes to bring the circuit safely below strict compliance thresholds.
Q4: How can our engineering development team request reference layout schematics, pin configuration spreadsheets, or high-volume wholesale pricing schedules?
A: Please complete our Quick Inquiry web form on this page with details about your processing parameters. Our application support desk will process your inquiry and dispatch the available technical documentation package within 24 hours.
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