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Analog Devices Inc./Maxim Integrated MAX31D80T-UGQ+
- Part No.:
- MAX31D80T-UGQ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX31D80T-UGQ+.pdf
- Description:
- IC CLOCK GENERATOR 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,982
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Product details
Overview
MAX31D80T-UGQ+ from Maxim Integrated is a down-dithered spread-spectrum clock generator IC that synthesizes a 100MHz output clock from a 27MHz crystal input using an integrated PLL, delivers ≤75ps peak cycle-to-cycle jitter, operates from 3.0V to 3.6V, and supports automotive-grade operation from −40°C to +125°C in graphics card timing systems.
For engineers reviewing the MAX31D80T-UGQ+ datasheet, MAX31D80T-UGQ+ pinout, MAX31D80T-UGQ+ application, or MAX31D80T-UGQ+ equivalent, key selection criteria include confirmed down-dither spread-spectrum capability at 31.25kHz dither rate, factory-programmed 100MHz output, TDFN-EP package compatibility, and automotive temperature compliance.
Technical Context
The MAX31D80T-UGQ+ implements a fully integrated PLL-based clock synthesis architecture with dedicated spread-spectrum modulation logic for electromagnetic interference (EMI) reduction. Its down-dither mode shifts output frequency downward from nominal by up to −3.0%, with dither magnitude selected via SMSEL0/SMSEL1 pins and requiring power-cycle activation.
It accepts either a 27MHz crystal (X1–X2) or 27MHz clock input, buffers the input signal on XOUT, and generates a spread-spectrum-modulated CLKOUT at precisely 100MHz. The device uses internal voltage regulation and supports 15pF load on XOUT and 10pF on CLKOUT at 100MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 100MHz - factory-programmed fixed-frequency clock output for synchronous digital subsystems |
| Dither Mode | Down-dither - reduces EMI by shifting spectrum energy below nominal frequency, not centering around it |
| Dither Rate | 31.25kHz - modulates frequency at this rate to spread spectral energy and lower peak emissions |
| Jitter (Peak C2C) | 75ps - ensures timing margin compliance in high-speed interfaces like PCIe or DDR clock domains |
| Supply Voltage | 3.3V (3.0V–3.6V range) - compatible with standard automotive 3.3V power rails and LDO outputs |
| Operating Temp | −40°C to +125°C - qualified for under-hood and infotainment module deployment without derating |
| Input Source | 27MHz crystal - enables low-cost, stable reference with minimal external components |
Pinout & Package
MAX31D80T-UGQ+ is housed in a 10-pin TDFN-EP package (3mm × 3mm × 0.8mm) with exposed pad (EP) tied to GND for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| X1 | Crystal drive / clock input | Primary oscillator interface; accepts 27MHz crystal or clock; no output if unconnected |
| SMSEL0, SMSEL1 | Spread-spectrum magnitude select | Two-state digital inputs configuring down-dither magnitude from 0% to −3.0%; require power cycle to update |
| VCC (pins 3, 8) | Power supply | Dual VCC pins reduce supply impedance and improve noise rejection across the die |
| GND (pins 4, 7) | Ground reference | Dual ground pins provide low-inductance return paths for analog and digital sections |
| CLKOUT | Spread-spectrum clock output | 100MHz modulated output driving 10pF load; used as system master clock |
| XOUT | Buffered input clock output | Non-modulated 27MHz replica of X1 input; supports clock fanout or monitoring |
| X2 | Crystal drive output | Completes crystal connection with X1; left open if clock input used instead of crystal |
| EP | Exposed thermal pad | Must be soldered to PCB GND plane for thermal dissipation and EMI shielding |
Key Features
| Feature | Design Value |
|---|---|
| Down-dither spread-spectrum modulation | Reduces radiated EMI peaks by shifting energy away from narrowband harmonics, easing FCC/CE compliance |
| Factory-programmed 100MHz output | Eliminates need for external configuration or EEPROM; guarantees exact frequency without calibration |
| Integrated 27MHz crystal oscillator driver | Supports low-cost, high-stability crystal reference without external buffer or load capacitors |
| Automotive temperature qualification | Validated operation over full −40°C to +125°C range, enabling use in ADAS and infotainment ECUs |
| Dual VCC/GND pins with EP | Minimizes supply noise coupling and improves jitter performance in electrically noisy vehicle environments |
Applications
| Graphics Card Timing | Automotive Infotainment |
|---|---|
Use Scenario: Synchronizing GPU memory interfaces and display pipelines in discrete graphics cards. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for PCIe root complex and GDDR6 memory controller clocks. Use Value: Reduces 100MHz harmonic radiation by >10dB, enabling compact PCB layout without added shielding or ferrites. | Use Scenario: Providing EMI-compliant clocking for multimedia SoCs and audio DSPs in head units. IC Role / Device Role / Timing Role: System master clock generator for ARM-based infotainment processors and HDMI transmitters. Use Value: Meets CISPR 25 Class 5 radiated emissions limits in vehicle cabin without compromising timing accuracy. |
| Set-Top Box Clocking | Industrial Printer Controller |
Use Scenario: Driving video decode engines and HDMI PHYs in consumer STBs with strict EMC requirements. IC Role / Device Role / Timing Role: Down-dithered 100MHz clock source for MPEG decoder ASICs and pixel clock generators. Use Value: Enables single-layer clock distribution with <75ps jitter, avoiding costly multi-stage buffering. | Use Scenario: Timing precision stepper motor controllers and image processing FPGAs in high-speed document printers. IC Role / Device Role / Timing Role: Low-jitter, spread-spectrum clock for motion control microcontrollers and line-scan sensor interfaces. Use Value: Maintains ±0.5% frequency stability across thermal cycling while suppressing motor-drive EMI coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar spread-spectrum clock generation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX31C80T-UGQ+ | Center-dither mode (±1.5%), same 100MHz output, identical package and pinout | Suitable where spectral energy must remain centered (e.g., RF coexistence-sensitive designs) | Select when EMI reduction requires symmetric spreading rather than low-side shifting |
| Si5351A-B-GM | Programmable I²C clock generator; 1–200MHz output; no built-in spread-spectrum; requires external configuration | Used in prototyping or multi-frequency systems where flexibility outweighs EMI optimization | Choose only if dynamic frequency reconfiguration is required and external MCU control is available |
Compared with MAX31C80T-UGQ+, the MAX31D80T-UGQ+ provides targeted low-side EMI suppression ideal for graphics and display timing, while Si5351A-B-GM offers programmability at the cost of added firmware complexity and no native spread-spectrum capability.
Availability
MAX31D80T-UGQ+ is available at Aetrix Electronics and suitable for graphics card timing, automotive infotainment systems, and set-top box clocking requiring stable component supply, automotive-grade reliability, and certified RoHS-compliant packaging.
Supply support for MAX31D80T-UGQ+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX31D80T-UGQ+ belongs to Maxim's spread-spectrum clock generator product line, engineered specifically to reduce electromagnetic interference in high-speed digital systems without sacrificing timing accuracy or requiring board-level redesign.
FAQ
What is the factory-programmed output frequency of the MAX31D80T-UGQ+?
The MAX31D80T-UGQ+ is factory-programmed to generate a precise 100MHz spread-spectrum clock output from a 27MHz crystal input. This frequency is fixed and non-reprogrammable in-circuit; no external configuration or I²C interface is required to achieve the specified output. The MAX31D80T-UGQ+ delivers this output with down-dither modulation at 31.25kHz and ≤75ps peak cycle-to-cycle jitter.
Does the MAX31D80T-UGQ+ support both crystal and clock input modes?
Yes, the MAX31D80T-UGQ+ accepts either a 27MHz crystal connected across X1 and X2, or a 27MHz single-ended clock applied to X1 alone (with X2 left open). In both cases, the device produces a buffered XOUT signal at 27MHz and a spread-spectrum-modulated CLKOUT at 100MHz. The MAX31D80T-UGQ+ does not support arbitrary input frequencies outside its specified 8–34MHz crystal or 8–134MHz clock ranges.
How is spread-spectrum magnitude configured on the MAX31D80T-UGQ+?
Spread-spectrum magnitude on the MAX31D80T-UGQ+ is set using the SMSEL0 and SMSEL1 pins, which select down-dither magnitudes from 0% to −3.0% in discrete steps. Configuration values are defined in Table 1 of the datasheet; changes require a full power cycle to take effect. The MAX31D80T-UGQ+ does not support runtime reconfiguration or analog voltage control of dither depth.
What is the recommended decoupling for the MAX31D80T-UGQ+?
Maxim recommends placing 0.01µF and 0.1µF high-quality ceramic capacitors close to both VCC pins (pins 3 and 8) of the MAX31D80T-UGQ+. These capacitors must be surface-mount types with minimal lead inductance and connected directly to the exposed pad (EP), which is tied to GND. Proper decoupling ensures stable PLL operation and maintains the MAX31D80T-UGQ+'s specified 75ps jitter performance across temperature.
Is the MAX31D80T-UGQ+ pin-compatible with the MAX31C80T-UGQ+?
Yes, the MAX31D80T-UGQ+ is pin-compatible with the MAX31C80T-UGQ+: both share identical 10-pin TDFN-EP packaging, pin assignments, supply requirements, and functional pin definitions. The only functional difference is dither mode-down vs. center-and corresponding factory-programmed parameters. No PCB layout change is needed when substituting between these two variants for EMI tuning.
MAX31D80T-UGQ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Spread Spectrum Clock Generator
- PLL:
- Yes with Bypass
- Input:
- Clock, Crystal
- Output:
- LVCMOS, Crystal
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:2
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 100MHz
- Divider/Multiplier:
- No/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-TDFN (3x3)
MAX31D80T-UGQ+ FAQ
1.How can I place an order for MAX31D80T-UGQ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX31D80T-UGQ+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX31D80T-UGQ+ reliable?
The price and inventory of MAX31D80T-UGQ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX31D80T-UGQ+ is usually 5 days.
3.What payment methods are accepted for MAX31D80T-UGQ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX31D80T-UGQ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX31D80T-UGQ+?
MAX31D80T-UGQ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX31D80T-UGQ+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX31D80T-UGQ+?
For technical support, including MAX31D80T-UGQ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX31D80T-UGQ+ requirements.
6.How does Aetrix verify that MAX31D80T-UGQ+ is sourced from the original manufacturer or authorized distributors?
All MAX31D80T-UGQ+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX31D80T-UGQ+ meets industry standards.
7.What is the process for return or replacement of MAX31D80T-UGQ+?
All MAX31D80T-UGQ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX31D80T-UGQ+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX31D80T-UGQ+ part is unused and in its original packaging.
Return procedure for MAX31D80T-UGQ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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