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Analog Devices Inc./Maxim Integrated DS1091LUA-040/V+T
- Part No.:
- DS1091LUA-040/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-040/V+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
DS1091LUA-040/V+T from Maxim Integrated is an automotive-grade spread-spectrum clock oscillator delivering a factory-programmed 40.0MHz center-dithered 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 reduces EMI in infotainment systems and LCD displays via pin-selectable dither magnitude (0%, ±1%, ±2%, ±4%) and rate.
For engineers reviewing the DS1091LUA-040/V+T datasheet, DS1091LUA-040/V+T pinout, DS1091LUA-040/V+T application, or DS1091LUA-040/V+T equivalent, key selection criteria include automotive temperature compliance (-40°C to +125°C), center-spread dithering capability, 40.0MHz factory-trimmed frequency, and µMAX package compatibility for space-constrained ECU and display timing designs.
Technical Context
The DS1091LUA-040/V+T implements a factory-programmed master oscillator with integrated triangle-wave generator and dither-rate divider to produce center-spread square-wave outputs. Its dither magnitude is set by SEL0/SEL1 logic states, and dither rate is controlled by DR pin state per output-frequency-dependent lookup table (n = 11 for 40.0MHz).
It operates exclusively in center-dither mode (DS1091LUA variant), not down-dither. Power-up behavior holds OUT low for ≤0.1ms before stable oscillation, and all I/O pins tolerate voltages up to VCC + 0.3V (max 6.0V) with sub-1µA input leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | Factory-set 40.0MHz center-spread spectrum output; enables EMI reduction in high-speed digital interfaces. |
| Frequency Accuracy | ±0.25% at +25°C; ensures precise timing alignment for video pixel clocks and audio sampling clocks. |
| Temperature Range | -40°C to +125°C; qualified for under-hood and dashboard-mounted automotive electronics. |
| Supply Voltage | 3.0V to 3.6V; compatible with standard automotive 3.3V rail without level-shifting. |
| Dither Magnitude | PIN-selectable: 0%, ±1%, ±2%, or ±4%; allows tuning of spectral spreading depth to meet specific FCC/EMC limits. |
| Output Rise/Fall Time | 1.02ns / 1.13ns (12pF load); supports clean edge integrity for 40MHz CMOS clock distribution. |
| Supply Current | 16mA typical at 3.6V, 40MHz, no dither; enables thermal budget planning in dense PCB layouts. |
Pinout & Package
DS1091LUA-040/V+T is housed in an 8-pin µMAX® package (outline 21-0036, land pattern 90-0092), RoHS-compliant and lead(Pb)-free, with exposed pad grounded per Maxim's recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Spread-spectrum clock output | CMOS-compatible square wave; drives downstream PLLs, processors, or display controllers directly. |
| 2 (VCC) | Positive supply input | Accepts 3.0V–3.6V; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet recommendation. |
| 3 (GND) | Ground reference | Substrate-connected to GND; must be low-impedance plane for EMI suppression and jitter control. |
| 4 (SEL1), 5 (SEL0) | Dither magnitude select inputs | Logic-level inputs (VIH ≥ 0.7×VCC, VIL ≤ 0.3×VCC); configure ±0%/±1%/±2%/±4% center spread. |
| 6, 7 (N.C.) | No connection | Internally unconnected; must remain floating or tied to GND-no routing or loading permitted. |
| 8 (DR) | Dither rate select input | Selects dither frequency: DR = 1 yields ~12.2kHz dither rate at 40.0MHz fOUT (n = 11). |
Key Features
| Feature | Design Value |
|---|---|
| Center-spread dithering | Reduces peak radiated emissions by up to 14dB at 33.3MHz (±4% dither), easing EMC certification for automotive displays. |
| Automotive qualification | Guaranteed operation over -40°C to +125°C with full parametric validation per AEC-Q200 stress profiles. |
| Factory-trimmed frequency | Eliminates external tuning components and calibration steps; delivers 40.0MHz ±0.25% out-of-box accuracy. |
| Pin-selectable dither control | Enables real-time EMI optimization during system bring-up without firmware or hardware changes. |
| Low-power active mode | 16mA supply current at 3.6V/40MHz allows integration into power-sensitive telematics modules. |
Applications
| Automotive Infotainment Head Unit | LCD Display Timing Module |
|---|---|
Use Scenario: Synchronizing video processing, GPU rendering, and HDMI transmitter in a vehicle head unit. IC Role / Device Role / Timing Role: Primary spread-spectrum pixel clock generator for 1080p/60Hz display interface. Use Value: Reduces 40MHz harmonic peaks by >10dB, enabling pass-fail margin on CISPR 25 Class 5 radiated emissions testing. | Use Scenario: Driving timing controller (TCON) in a 7-inch automotive-grade TFT-LCD panel. IC Role / Device Role / Timing Role: Factory-calibrated 40.0MHz center-spread clock source for source driver ICs. Use Value: Eliminates need for external crystal + PLL; simplifies BOM and improves board-level EMI robustness. |
| Industrial HMI Panel | POS Terminal Mainboard |
Use Scenario: Providing EMI-compliant clocking for ARM-based HMI running Linux GUI stack. IC Role / Device Role / Timing Role: System clock generator for SoC and peripheral bridges (USB, SDIO). Use Value: Maintains ±1.75% stability across wide industrial temperature range while meeting EN 55032 Class B limits. | Use Scenario: Clocking the main processor and display interface in a retail point-of-sale terminal. IC Role / Device Role / Timing Role: Low-cost, drop-in replacement for quartz-based oscillators in cost-sensitive commercial designs. Use Value: Achieves same 40MHz timing accuracy with superior jitter performance and reduced board-level filtering. |
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, but requires external configuration and lacks automotive temp rating. | Used in lab/test equipment and non-automotive embedded systems where flexibility outweighs qualification needs. | Choose only if multi-frequency generation and software control are required-and automotive qualification is not mandated. |
| ICS843002AGI-01LFT | Fixed 40MHz LVDS spread-spectrum oscillator; -40°C to +85°C industrial grade, not automotive qualified. | Suitable for commercial-grade displays and office printers where extended temperature is unnecessary. | Select when lower cost and LVDS signaling are priorities-but avoid for automotive or harsh-environment use. |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1091LUA-040/V+T uniquely combines AEC-Q200-aligned automotive temperature range, factory-programmed simplicity, and pin-selectable dither-all in a compact µMAX package-making it optimal for production automotive timing where reliability and EMI compliance are non-negotiable.
Availability
DS1091LUA-040/V+T is available at Aetrix Electronics and suitable for automotive infotainment, LCD display timing, and industrial HMI applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1091LUA-040/V+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 was developed specifically as a low-cost, automotive-qualified spread-spectrum EconOscillator™ to replace crystals and reduce EMI in timing-critical display and infotainment subsystems.
FAQ
What is the factory-programmed output frequency of DS1091LUA-040/V+T?
The DS1091LUA-040/V+T is factory-programmed to deliver a precise 40.0MHz center-spread spectrum clock output. This frequency is trimmed during manufacturing and guaranteed within ±0.25% at +25°C and ±1.75% across the full -40°C to +125°C automotive temperature range. No external programming or configuration is required to achieve this output.
Does DS1091LUA-040/V+T support down-spread dithering?
No, DS1091LUA-040/V+T does not support down-spread dithering. It belongs to the DS1091LUA variant family, which is configured exclusively for center-spread dithering (±X% around the 40.0MHz nominal frequency). Down-spread functionality is only available in the DS1091LUB variant series, such as DS1091LUB-040/V+T - a different part number with distinct pin-function mapping and dither tables.
What are the absolute maximum ratings for VCC and logic inputs on DS1091LUA-040/V+T?
The DS1091LUA-040/V+T has an absolute maximum VCC rating of -0.5V to +6.0V relative to GND. For logic inputs (SEL0, SEL1, DR), voltage must stay within -0.5V to (VCC + 0.5V), with the upper limit capped at +6.0V. Exceeding these values may cause permanent damage. Recommended operating VCC is strictly 3.0V to 3.6V, and input logic thresholds are VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC.
How is dither rate selected on DS1091LUA-040/V+T, and what is its value at 40.0MHz?
Dither rate on DS1091LUA-040/V+T is selected using the DR pin: DR = 1 selects the higher dither rate, DR = 0 the lower. At 40.0MHz output, the device uses n = 11 from Table 2, yielding dither rates of ~12.2kHz (DR = 1) and ~6.1kHz (DR = 0). This relationship is fixed per output frequency band and derived from the internal dither-rate divider architecture described in the DS1091L datasheet.
Is DS1091LUA-040/V+T pin-compatible with other DS1091L variants like DS1091LUA-033/V+T?
Yes, DS1091LUA-040/V+T is pin-compatible with all DS1091LUA-x/V+T variants in the same µMAX package, including DS1091LUA-033/V+T and DS1091LUA-066/V+T. They share identical pinout (OUT, VCC, GND, SEL1, SEL0, N.C., N.C., DR), electrical characteristics, and functional interface. The only difference is the factory-programmed center frequency - 40.0MHz for DS1091LUA-040/V+T - allowing direct substitution where timing requirements align.
DS1091LUA-040/V+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:
- Obsolete
- 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:
- 40MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-uMAX/uSOP
DS1091LUA-040/V+T FAQ
1.How can I place an order for DS1091LUA-040/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-040/V+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-040/V+T reliable?
The price and inventory of DS1091LUA-040/V+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-040/V+T is usually 5 days.
3.What payment methods are accepted for DS1091LUA-040/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-040/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-040/V+T?
DS1091LUA-040/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-040/V+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-040/V+T?
For technical support, including DS1091LUA-040/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-040/V+T requirements.
6.How does Aetrix verify that DS1091LUA-040/V+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-040/V+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-040/V+T meets industry standards.
7.What is the process for return or replacement of DS1091LUA-040/V+T?
All DS1091LUA-040/V+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-040/V+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-040/V+T part is unused and in its original packaging.
Return procedure for DS1091LUA-040/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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