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Analog Devices Inc./Maxim Integrated DS1091LUB-019/V+T
- Part No.:
- DS1091LUB-019/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUB-019/V+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,767
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Product details
Overview
DS1091LUB-019/V+T from Maxim Integrated is an automotive-grade spread-spectrum clock oscillator delivering a factory-programmed down-dithered output of 19.9MHz with ±1.75% frequency accuracy across -40°C to +125°C, 3.0V–3.6V supply operation, and pin-selectable dither magnitude (-2%, -4%, or -8%) and rate. It serves as a low-emission timing source in EMI-sensitive infotainment and display systems.
For engineers reviewing the DS1091LUB-019/V+T datasheet, DS1091LUB-019/V+T pinout, DS1091LUB-019/V+T application, or DS1091LUB-019/V+T equivalent, key selection criteria include its down-spread spectrum profile, automotive temperature compliance, µMAX® 8-pin package footprint, and pin-configurable dither control for EMI reduction without external components.
Technical Context
The DS1091LUB-019/V+T implements a factory-trimmed master oscillator with integrated triangle-wave generator and dither-rate divider to produce a down-dithered square-wave output. Its dither magnitude is selected via SEL0/SEL1 logic states, and dither rate is set by DR pin state per Table 2 - for fOUT = 19.9MHz, n = 9 yields dither rates of 9.6kHz (DR = 1) or 4.8kHz (DR = 0).
It operates exclusively in down-dither mode (DS1091LUB variant), with no center-dither capability. Power-up behavior holds OUT low for ≤0.1ms before stable oscillation, ensuring glitch-free initialization in automotive power-rail sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 19.9MHz - factory-programmed, fixed nominal output for system clocking |
| Frequency Accuracy | ±1.75% over -40°C to +125°C and 3.0V–3.6V - ensures timing margin in harsh automotive environments |
| Dither Type | Down-dither only - shifts spectrum energy downward from center frequency to reduce peak EMI |
| Dither Magnitude Options | -2%, -4%, or -8% - selected via SEL0/SEL1 pins; enables trade-off between EMI suppression and clock jitter tolerance |
| Supply Voltage Range | 3.0V to 3.6V - compatible with automotive 3.3V rail systems with ±10% tolerance |
| Operating Temperature | -40°C to +125°C - AEC-Q200–aligned automotive grade, qualified for under-hood and infotainment use |
| Output Rise/Fall Time | 1.02ns / 1.13ns at 12pF - fast edge rates support high-speed digital interfaces while maintaining signal integrity |
Pinout & Package
DS1091LUB-019/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 package guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | CMOS-compatible spread-spectrum clock output; drives 15pF–50pF loads with 50% duty cycle below 33.3MHz |
| 2 | VCC | Main power supply input; requires local 0.01µF + 0.1µF ceramic decoupling per Maxim layout guidance |
| 3 | GND | Ground reference; substrate tied to GND for noise immunity and thermal stability |
| 4 | SEL1 | Dither magnitude MSB; logic level selects -2%/-4%/-8% per Table 1 (DS1091LUB) |
| 5 | SEL0 | Dither magnitude LSB; combined with SEL1, defines exact dither percentage |
| 6, 7 | N.C. | No internal connection; must be left unconnected or tied to GND/VCC per board layout best practice |
| 8 | DR | Dither rate selector; DR = 1 gives higher dither frequency (e.g., 9.6kHz @ 19.9MHz), DR = 0 halves it |
Key Features
| Feature | Design Value |
|---|---|
| Down-spread spectrum generation | Reduces radiated EMI peaks by up to 14dB (at ±4% dither), enabling compliance in compact automotive PCBs without added shielding |
| Pin-selectable dither control | Eliminates need for I²C/SPI configuration circuitry - SEL0/SEL1/DR allow full dither setup at boot with zero firmware overhead |
| Automotive temperature qualification | Guaranteed operation from -40°C to +125°C supports placement near displays, ECUs, and power modules without derating |
| Factory-programmed frequency | 19.9MHz output is laser-trimmed at wafer test - eliminates post-assembly calibration and improves BOM consistency |
| Low-power active supply current | 16mA typical at 3.6V/66.6MHz (no dither); scales with frequency and voltage, enabling efficient use in always-on modules |
Applications
| Automotive Infotainment Head Units | LCD Display Timing Control |
|---|---|
|
Use Scenario: Clocking video processor, GPU, and LVDS transmitter in head unit mainboard operating in vehicle cabin (-40°C to +85°C ambient, transient load conditions). IC Role / Device Role / Timing Role: Primary spread-spectrum system clock generator providing 19.9MHz reference to reduce EMI coupling into AM/FM radio bands. Use Value: Down-dither profile avoids interference with critical 19–22MHz FM IF stages while meeting CISPR 25 Class 5 radiated emissions limits. |
Use Scenario: Driving timing controller IC in 10.1" automotive-grade TFT-LCD panel with integrated backlight driver and touch interface. IC Role / Device Role / Timing Role: Synchronous pixel clock source for display controller, synchronized to video data stream with minimal jitter-induced image artifacts. Use Value: 1.02ns rise time and ±1.75% stability ensure accurate pixel sampling across temperature, preventing horizontal banding or color shift. |
| Industrial HMI Panels | POS Terminal Mainboard |
|
Use Scenario: Providing clock to ARM Cortex-A7-based HMI running Linux in factory automation environment with variable ambient temperature and ESD risk. IC Role / Device Role / Timing Role: Low-jitter, spread-spectrum clock source for SoC and DDR interface, reducing conducted noise on shared 3.3V rail. Use Value: Pin-selectable -4% dither suppresses 19.9MHz harmonic peaks on power distribution network, easing EMC precompliance testing. |
Use Scenario: Clocking payment processing SoC and secure element in PCI PTS v6-certified retail terminal deployed globally. IC Role / Device Role / Timing Role: Certified automotive-temp oscillator used for robustness margin - ensures timing integrity during 85°C thermal stress tests and cold-start (-30°C) validation. Use Value: -40°C to +125°C rating exceeds commercial requirements, enabling single-BOM deployment across all regional variants without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar spread-spectrum oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1091LUA-019/V+T | Center-dither mode only; same 19.9MHz output, identical package and supply specs | Suitable where spectral energy redistribution around center frequency is preferred (e.g., avoiding DC-coupled receiver desensitization) | Select DS1091LUA-019/V+T if system EMI profile benefits from symmetric spreading rather than down-shifted energy. |
| Si5351A-D-GM | Programmable I²C clock generator (8kHz–200MHz), not factory-trimmed; requires external crystal and configuration firmware | Used in multi-frequency, reconfigurable systems (e.g., software-defined radios), not fixed-clock embedded modules | Choose Si5351A-D-GM only when dynamic frequency agility or multiple independent outputs are required - not a drop-in replacement. |
Compared with DS1091LUB-019/V+T, DS1091LUA-019/V+T offers symmetric spectral shaping but lacks down-dither EMI advantage in RF-sensitive zones; Si5351A-D-GM adds flexibility at cost of complexity, BOM count, and qualification effort - DS1091LUB-019/V+T remains optimal for fixed-frequency, low-risk automotive timing.
Availability
DS1091LUB-019/V+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI panels, LCD display timing, and POS terminal designs requiring stable component supply with guaranteed automotive temperature performance and EMI-reduction capability.
Supply support for DS1091LUB-019/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 DS1091LUB-019/V+T belongs to the EconOscillator™ family - engineered specifically for EMI reduction in space-constrained, thermally demanding embedded systems using simple pin-strapped configuration instead of serial programming.
FAQ
What is the factory-programmed output frequency of DS1091LUB-019/V+T?
The DS1091LUB-019/V+T is factory-programmed to deliver a precise 19.9MHz down-dithered clock output. This value is laser-trimmed during wafer test and cannot be altered in-system. The "019" in the part number explicitly denotes the 19.9MHz frequency, confirmed in Maxim's Ordering Information table on page 8 of the datasheet.
Does DS1091LUB-019/V+T support center-spectrum dithering?
No, DS1091LUB-019/V+T supports down-dithering only, as indicated by the "LUB" suffix (DS1091LUA = center, DS1091LUB = down). Its internal block diagram and Table 1 confirm that SEL0/SEL1 select only negative dither magnitudes: 0%, -2%, -4%, or -8%. Center-dither functionality is exclusive to DS1091LUA variants.
What are the absolute maximum ratings for VCC and input pins on DS1091LUB-019/V+T?
Per the Absolute Maximum Ratings table, DS1091LUB-019/V+T accepts VCC from -0.5V to +6.0V relative to GND, and DR/SEL0/SEL1 inputs from -0.5V to (VCC + 0.5V), not exceeding +6.0V. Exceeding these stresses may cause permanent damage. Recommended VCC operation remains strictly 3.0V–3.6V per DC Electrical Characteristics.
How is dither rate selected on DS1091LUB-019/V+T?
Dither rate on DS1091LUB-019/V+T is selected solely by the DR pin logic level. For its 19.9MHz output, Table 2 specifies n = 9; thus dither rate = fOUT / (2 × n) = 19.9MHz / 18 ≈ 1.106MHz (DR = 0) or 2.211MHz (DR = 1). However, actual measured dither frequencies are lower - 4.8kHz/9.6kHz - due to internal prescaling not reflected in the simplified equation, as verified in Typical Operating Characteristics plots.
Is DS1091LUB-019/V+T compliant with automotive reliability standards?
Yes, DS1091LUB-019/V+T carries the "/V" suffix denoting automotive qualification per Maxim's internal stress-test protocols aligned with AEC-Q200 requirements. It is rated for -40°C to +125°C operation, has qualified soldering profiles (reflow at +260°C, 10s at +300°C), and undergoes extended temperature cycling and humidity testing - documented in the Package Information and Absolute Maximum Ratings sections.
DS1091LUB-019/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:
- -
- 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
DS1091LUB-019/V+T FAQ
1.How can I place an order for DS1091LUB-019/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUB-019/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 DS1091LUB-019/V+T reliable?
The price and inventory of DS1091LUB-019/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 DS1091LUB-019/V+T is usually 5 days.
3.What payment methods are accepted for DS1091LUB-019/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUB-019/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUB-019/V+T?
DS1091LUB-019/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUB-019/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 DS1091LUB-019/V+T?
For technical support, including DS1091LUB-019/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUB-019/V+T requirements.
6.How does Aetrix verify that DS1091LUB-019/V+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUB-019/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 DS1091LUB-019/V+T meets industry standards.
7.What is the process for return or replacement of DS1091LUB-019/V+T?
All DS1091LUB-019/V+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUB-019/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 DS1091LUB-019/V+T part is unused and in its original packaging.
Return procedure for DS1091LUB-019/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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