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Analog Devices Inc./Maxim Integrated MAX31D80T-UGQ+T
- Part No.:
- MAX31D80T-UGQ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX31D80T-UGQ+T.pdf
- Description:
- IC CLOCK GENERATOR 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,419
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Product details
Overview
MAX31D80T-UGQ+T from Maxim Integrated is a down-dithered spread-spectrum clock generator IC with factory-programmed 100MHz output, 27MHz crystal input, 31.25kHz dither rate, and 3.3V supply, used to reduce EMI in automotive infotainment and graphics subsystems.
For engineers reviewing the MAX31D80T-UGQ+T datasheet, MAX31D80T-UGQ+T pinout, MAX31D80T-UGQ+T application, or MAX31D80T-UGQ+T equivalent, key selection criteria include confirmed down-dither spread-spectrum operation, 10-pin TDFN-EP package compatibility, -40°C to +125°C automotive temperature range, and factory-programmed 100MHz/27MHz frequency pair.
Technical Context
The MAX31D80T-UGQ+T integrates a PLL-based clock synthesis path accepting 27MHz crystal input and generating a down-dithered 100MHz CLKOUT with ±0.25% to -3.0% modulation depth. It buffers the input clock on XOUT without spread-spectrum modulation.
Spread-spectrum magnitude is set via SMSEL0/SMSEL1 pins per Table 1; power cycling is required after configuration changes. Dither rate is factory-fixed at 31.25kHz, and peak cycle-to-cycle jitter is 75ps at 100MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 100MHz - factory-programmed, stable clock for GPU or display interface timing |
| Input Source | 27MHz crystal - enables low-cost, high-stability reference without external oscillator |
| Dither Type | Down-dithered - reduces EMI by shifting energy below nominal frequency, not symmetrically |
| Dither Rate | 31.25kHz - fixed factory setting; determines modulation speed and spectral spreading density |
| Supply Voltage | 3.3V (3.0–3.6V) - compatible with automotive domain controllers and standard logic I/O rails |
| Operating Temp | -40°C to +125°C - qualified for under-hood and infotainment module deployment |
| Jitter (Peak C2C) | 75ps @ 100MHz - ensures setup/hold margin for high-speed parallel interfaces like LVDS or DDR clocks |
Pinout & Package
Package: 10-pin TDFN-EP (3mm × 3mm × 0.8mm) with exposed pad connected to GND for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| X1 | Crystal drive / clock input | Primary reference input; accepts 27MHz crystal or 8–134MHz clock signal |
| SMSEL0, SMSEL1 | Spread-spectrum magnitude select | Two-state digital inputs configuring down-dither depth (0% to -3.0%) per Table 1 |
| VCC (Pins 3, 8) | Power supply | Dual VCC pins reduce IR drop and improve noise rejection across 3.0–3.6V range |
| GND (Pins 4, 7) | Ground reference | Dual ground pins provide low-impedance return paths for analog and digital sections |
| CLKOUT | Spread-spectrum clock output | 100MHz down-dithered output driving loads up to 10pF (67–101MHz range) |
| XOUT | Buffered input clock output | Non-modulated 27MHz replica of X1 input; supports clock fanout without PLL delay |
| X2 | Crystal drive output | Completes crystal oscillator circuit; must be left open if clock input used at X1 |
| EP | Exposed pad | Thermal and electrical connection to PCB ground plane; mandatory for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Down-dither spread spectrum | Reduces peak radiated emissions by shifting clock energy downward, easing FCC/CE compliance in dense PCB layouts |
| Factory-programmed 100MHz/27MHz pair | Eliminates need for external configuration EEPROM or firmware initialization; ready-to-use timing solution |
| Low cycle-to-cycle jitter (75ps) | Maintains timing integrity for high-speed serial links and pixel clocking where jitter directly impacts bit error rate |
| Automotive-grade temperature range | Validated operation from -40°C to +125°C enables use in head units, ADAS displays, and body control modules |
| Integrated crystal buffer (XOUT) | Provides clean, low-skew 27MHz copy for auxiliary circuits (e.g., audio codec or MCU peripherals) without loading X1 |
Applications
| Graphics Cards | Automotive Infotainment |
|---|---|
|
Use Scenario: High-resolution display timing in discrete GPU or embedded graphics subsystems. IC Role / Device Role / Timing Role: Primary spread-spectrum pixel clock generator delivering 100MHz to LVDS or eDP transmitter. Use Value: Down-dithering suppresses 100MHz harmonic peaks, reducing conducted EMI on video interface traces and simplifying shielded cable requirements. |
Use Scenario: Central infotainment head unit requiring EMI-compliant clocking for multimedia SoC and display driver. IC Role / Device Role / Timing Role: Factory-configured 100MHz system clock source synchronized to 27MHz crystal reference. Use Value: Automotive temperature qualification and fixed 31.25kHz dither rate ensure consistent EMI reduction across vehicle lifecycle and environmental conditions. |
| Set-Top Boxes | Printers |
|
Use Scenario: Digital video processing board in consumer STB with HDMI output and tuner subsystem. IC Role / Device Role / Timing Role: Clock generator providing dithered 100MHz for video encoder and non-dithered 27MHz for tuner IF stage via XOUT. Use Value: Dual-output capability eliminates need for separate buffer IC, reducing BOM count and layout area while maintaining isolation between modulated and clean clocks. |
Use Scenario: Laser printer controller board managing print engine timing, image data transfer, and motor control. IC Role / Device Role / Timing Role: EMI-reduced 100MHz clock for FPGA-based image pipeline and 27MHz reference for USB 2.0 PHY. Use Value: Down-dithered CLKOUT meets Class B FCC limits without ferrite beads or additional shielding, lowering manufacturing cost and test time. |
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+T | Center-dithered 100MHz output; ±0.25% to ±1.5% modulation; same pinout and package | Used where symmetrical spectral spreading is preferred (e.g., systems sensitive to subharmonic injection) | Select when center-dither EMI profile better matches system-level noise floor or regulatory test plan |
| Si5351A-B-GM | Programmable I²C clock generator; 8kHz–200MHz output; no built-in spread spectrum; requires external configuration | Suitable for multi-frequency, software-tunable systems but adds firmware dependency and layout complexity | Choose only if dynamic frequency reconfiguration is required and EMI mitigation is handled elsewhere (e.g., via layout or filtering) |
Compared with MAX31C80T-UGQ+T and Si5351A-B-GM, the MAX31D80T-UGQ+T provides deterministic down-dither EMI suppression without software overhead, making it optimal for cost-sensitive, high-volume automotive and industrial timing applications where factory-programmed stability is critical.
Availability
MAX31D80T-UGQ+T is available at Aetrix Electronics and suitable for graphics cards, automotive infotainment systems, and printers requiring stable component supply with guaranteed automotive temperature qualification and RoHS-compliant packaging.
Supply support for MAX31D80T-UGQ+T 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 timing ICs for automotive, industrial, and communications applications.
The MAX31D80T-UGQ+T belongs to Maxim's spread-spectrum clock generator product line, engineered specifically to reduce electromagnetic interference in high-speed digital systems using deterministic down-dither modulation.
FAQ
What is the factory-programmed output frequency of the MAX31D80T-UGQ+T?
The MAX31D80T-UGQ+T is factory-programmed for a 100MHz spread-spectrum clock output derived from a 27MHz crystal input. This frequency pair is fixed and cannot be altered in-circuit; no configuration registers or external programming are required for operation.
Does the MAX31D80T-UGQ+T support center-dither spread spectrum?
No, the MAX31D80T-UGQ+T implements down-dither spread spectrum only. Center-dither functionality is exclusive to the MAX31C80 variant. The 'D' in MAX31D80 explicitly denotes down-dither mode, and its internal logic and factory programming are optimized for asymmetric frequency modulation below the nominal value.
What is the purpose of the XOUT pin on the MAX31D80T-UGQ+T?
The XOUT pin on the MAX31D80T-UGQ+T provides a buffered, non-spread-spectrum replica of the input clock or crystal signal (27MHz in this case). It allows secondary timing domains-such as audio subsystems or microcontroller peripherals-to share the same stable reference without introducing PLL-induced jitter or modulation artifacts.
Can the dither magnitude of the MAX31D80T-UGQ+T be adjusted in-system?
Yes, the dither magnitude of the MAX31D80T-UGQ+T can be adjusted using the SMSEL0 and SMSEL1 pins per Table 1 in the datasheet, enabling selection across 0% to -3.0% down-dither depth. However, each change requires a full power cycle to take effect; dynamic real-time adjustment is not supported.
Is the MAX31D80T-UGQ+T qualified for automotive applications?
Yes, the MAX31D80T-UGQ+T is fully qualified for automotive use with guaranteed operation over -40°C to +125°C ambient temperature and AEC-Q100 stress testing alignment. Its 10-pin TDFN-EP package, 3.3V supply tolerance, and robust ESD protection meet requirements for infotainment and ADAS timing subsystems.
MAX31D80T-UGQ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX31D80T-UGQ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX31D80T-UGQ+T 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+T reliable?
The price and inventory of MAX31D80T-UGQ+T 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+T is usually 5 days.
3.What payment methods are accepted for MAX31D80T-UGQ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX31D80T-UGQ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX31D80T-UGQ+T?
MAX31D80T-UGQ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX31D80T-UGQ+T 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+T?
For technical support, including MAX31D80T-UGQ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX31D80T-UGQ+T requirements.
6.How does Aetrix verify that MAX31D80T-UGQ+T is sourced from the original manufacturer or authorized distributors?
All MAX31D80T-UGQ+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX31D80T-UGQ+T?
All MAX31D80T-UGQ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX31D80T-UGQ+T, 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+T part is unused and in its original packaging.
Return procedure for MAX31D80T-UGQ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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