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Analog Devices Inc./Maxim Integrated DS1091LUA-066+T
- Part No.:
- DS1091LUA-066+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-066+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,308
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Product details
Overview
DS1091LUA-066+T from Maxim Integrated is a factory-programmed, center-dithered spread-spectrum oscillator delivering 66.6MHz output with ±0.25% nominal accuracy at +25°C, ±1.75% across -40°C to +125°C, and 3.0V–3.6V supply operation in an 8-pin µMAX® package. It serves as an EMI-reduction clock source for automotive infotainment and industrial control systems requiring robust timing under harsh thermal conditions.
For engineers reviewing the DS1091LUA-066+T datasheet, DS1091LUA-066+T pinout, DS1091LUA-066+T application, or DS1091LUA-066+T equivalent, key selection criteria include dither magnitude selectability (0%, ±1%, ±2%, ±4%), dither rate configuration via DR pin, automotive-grade temperature range compliance, and guaranteed frequency tolerance over voltage and temperature.
Technical Context
The DS1091LUA-066+T implements a factory-trimmed master oscillator with integrated triangle-wave generator and dither-rate divider to produce center-spread spectral output. Its architecture enables programmable dither amplitude and rate without external components, using only SEL0/SEL1 logic states and DR pin level.
It operates exclusively in center-dither mode (DS1091LUA variant), supports load capacitance up to 50pF, delivers rail-to-rail CMOS-compatible output swing (VOH ≥2.4V, VOL ≤0.4V), and features power-up hold-low behavior (tPU = 0.1ms) to prevent spurious system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 66.6MHz - factory-programmed fixed frequency, no tuning required |
| Frequency Accuracy | ±0.25% at +25°C - ensures precise timing reference for high-speed digital interfaces |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial environments |
| Supply Voltage | 3.0V to 3.6V - compatible with modern low-voltage microcontroller and ASIC power rails |
| Dither Magnitude | Pin-selectable: 0%, ±1%, ±2%, ±4% - enables EMI reduction optimization per board layout |
| Output Rise/Fall Time | 1.02ns / 1.13ns at 12pF - supports clean signal integrity for >50MHz clock distribution |
| Supply Current | 16mA typical at 66.6MHz, 3.6V - enables thermal-aware power budgeting in dense PCBs |
Pinout & Package
DS1091LUA-066+T is housed in an 8-pin µMAX® package (outline 21-0036, land pattern 90-0092), RoHS-compliant and lead(Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Spread-spectrum clock output | CMOS-compatible square wave output with dithered spectrum; drives 15–50pF loads |
| 2 (VCC) | Power supply input | 3.0V–3.6V main supply; requires local 0.01µF + 0.1µF ceramic decoupling |
| 3 (GND) | Ground reference | Substrate-connected ground; must be low-impedance return path for output switching current |
| 4 (SEL1), 5 (SEL0) | Dither magnitude select inputs | Logic-level inputs defining dither %: 00=none, 01=±1%, 10=±2%, 11=±4% |
| 6, 7 (N.C.) | No connection | Internally unconnected; must remain floating or tied to GND/VCC per layout best practice |
| 8 (DR) | Dither rate select input | Selects dither frequency: DR=0 → lower rate, DR=1 → higher rate (n-dependent per fOUT) |
Key Features
| Feature | Design Value |
|---|---|
| Center-dithered spread-spectrum output | Reduces peak radiated emissions by up to 14dB at 33.3MHz (±4% dither), easing EMC certification |
| Automotive temperature qualification | Guaranteed operation from -40°C to +125°C meets AEC-Q200 stress test requirements |
| Pin-selectable dither parameters | Enables field-configurable EMI suppression without firmware or hardware change |
| Factory-trimmed frequency accuracy | Eliminates need for external calibration or trimming components in production |
| Low-power active mode | 16mA supply current at 66.6MHz allows integration into power-constrained automotive modules |
Applications
| Automotive Infotainment Head Units | Industrial PLC Timing Modules |
|---|---|
Use Scenario: Clocking video processing ASICs and display controllers in dash-mounted infotainment systems exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Primary spread-spectrum clock generator providing 66.6MHz reference with center dither to suppress narrowband EMI peaks. Use Value: Enables compliance with CISPR 25 Class 5 radiated emissions limits without added shielding or ferrites. | Use Scenario: Synchronizing real-time I/O scanning and communication stacks in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-stability system clock source operating continuously across extended industrial temperature range. Use Value: Maintains ±1.75% frequency stability over -40°C to +125°C, ensuring deterministic scan cycle timing. |
| LCD Display Timing Controllers | POS Terminal Mainboard Clocking |
Use Scenario: Driving LVDS or RGB interface timing in automotive-grade LCD instrument clusters with strict EMI budgets. IC Role / Device Role / Timing Role: Low-jitter (0.3% RMS at 50MHz) center-dithered oscillator minimizing pixel clock harmonics. Use Value: Reduces display panel RF noise coupling into adjacent analog sensor traces. | Use Scenario: Providing main system clock for ARM-based point-of-sale terminals deployed in retail environments with variable ambient temperatures. IC Role / Device Role / Timing Role: Automotive-qualified oscillator ensuring reliable boot and USB/PCIe link training across seasonal temperature swings. Use Value: Eliminates cold-start timing failures observed with commercial-grade oscillators below -20°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar spread-spectrum oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5351A-B-GM | Programmable I²C clock generator; supports multiple outputs, not factory-trimmed single-frequency | Requires MCU firmware control; suited for multi-frequency, reconfigurable systems | Choose Si5351A-B-GM when dynamic frequency adjustment or multiple synchronized clocks are needed |
| ICS8430I-01T | Fixed-frequency LVDS spread-spectrum oscillator; 66.6MHz, ±100ppm stability, -40°C to +85°C | Limited temperature range; no pin-selectable dither magnitude or rate | Choose ICS8430I-01T only for non-automotive industrial applications where extended temperature is not required |
Compared with Si5351A-B-GM and ICS8430I-01T, DS1091LUA-066+T provides automotive-grade temperature resilience, zero-firmware pin-strapped dither control, and tighter initial accuracy-making it optimal for cost-sensitive, fixed-frequency EMI-critical deployments.
Availability
DS1091LUA-066+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC timing, LCD display controllers, and POS terminal mainboards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DS1091LUA-066+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 solutions for automotive, industrial, and communications markets.
The DS1091L series belongs to Maxim's EconOscillator™ family-engineered specifically for EMI reduction in space-constrained, thermally aggressive applications using simple pin-strapped configuration instead of complex programming interfaces.
FAQ
What is the factory-programmed output frequency of DS1091LUA-066+T?
The DS1091LUA-066+T is factory-programmed to deliver a precise 66.6MHz spread-spectrum clock output. This frequency is laser-trimmed during manufacturing and cannot be altered in-circuit. The "066" in the part number explicitly denotes the 66.6MHz center frequency, and DS1091LUA-066+T maintains this value across its full automotive temperature range (-40°C to +125°C) with ±1.75% total variation.
Does DS1091LUA-066+T support down-dithered spread-spectrum operation?
No, DS1091LUA-066+T supports center-dithered spread-spectrum only. The "UA" suffix identifies it as the center-dither variant (DS1091LUA); down-dither functionality is exclusive to DS1091LUB variants. Attempting to configure DS1091LUA-066+T for down-dither will not yield the intended spectral profile, as its internal triangle-wave generator and modulation path are optimized for symmetric center spreading around the 66.6MHz nominal frequency.
What are the valid logic levels for SEL0, SEL1, and DR pins on DS1091LUA-066+T?
For DS1091LUA-066+T, SEL0 and SEL1 accept VIH ≥ 0.7 × VCC and VIL ≤ 0.3 × VCC, while DR follows the same thresholds. With VCC = 3.3V, this means high level is ≥2.31V and low level is ≤0.99V. These pins are CMOS-compatible and must be driven actively-floating states are undefined and may cause unpredictable dither magnitude or rate selection. Pull-up/pull-down resistors are recommended if driven by open-drain or weak sources.
Can DS1091LUA-066+T operate outside the 3.0V–3.6V supply range?
No, DS1091LUA-066+T is specified and guaranteed only for 3.0V to 3.6V operation. Absolute maximum VCC is +6.0V, but functional operation below 3.0V or above 3.6V is not characterized. Supplying 2.8V may result in degraded frequency accuracy (>±1.75%), increased jitter, or failure to start; 3.7V risks accelerated aging or parametric shift. Always regulate VCC within the recommended range and use proper decoupling as specified in the DS1091LUA-066+T datasheet.
Is DS1091LUA-066+T pin-compatible with other DS1091L variants like DS1091LUA-033+T?
Yes, all DS1091LUA-x and DS1091LUB-x variants share identical 8-pin µMAX® packaging and pinout, including DS1091LUA-066+T. Pin functions (OUT, VCC, GND, SEL0, SEL1, N.C., DR) are consistent across the family. However, frequency, dither type (center vs. down), and factory trim are unique per part number-so while PCB layout is reusable, system-level timing validation is required when substituting frequencies or dither modes.
DS1091LUA-066+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconOscillator™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Spread Spectrum Clock Generator
- PLL:
- No
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:1
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 66.6MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
DS1091LUA-066+T FAQ
1.How can I place an order for DS1091LUA-066+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-066+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 DS1091LUA-066+T reliable?
The price and inventory of DS1091LUA-066+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1091LUA-066+T is usually 5 days.
3.What payment methods are accepted for DS1091LUA-066+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-066+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-066+T?
DS1091LUA-066+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-066+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 DS1091LUA-066+T?
For technical support, including DS1091LUA-066+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-066+T requirements.
6.How does Aetrix verify that DS1091LUA-066+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-066+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 DS1091LUA-066+T meets industry standards.
7.What is the process for return or replacement of DS1091LUA-066+T?
All DS1091LUA-066+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-066+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 DS1091LUA-066+T part is unused and in its original packaging.
Return procedure for DS1091LUA-066+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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