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Analog Devices Inc./Maxim Integrated DS1091LUA-330+
- Part No.:
- DS1091LUA-330+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-330+.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
DS1091LUA-330+ from Maxim Integrated is an automotive-grade spread-spectrum clock oscillator factory-programmed to 33.0MHz, delivering ±0.25% center-frequency accuracy at +25°C and ±1.75% across -40°C to +125°C, with center-dithered output, 3.0V–3.6V supply operation, and 8-pin µMAX® package. It reduces EMI in infotainment systems and LCD displays by modulating output frequency via pin-selectable dither magnitude and rate.
For engineers reviewing the DS1091LUA-330+ datasheet, DS1091LUA-330+ pinout, DS1091LUA-330+ application, or DS1091LUA-330+ equivalent, key selection considerations include its center-dither spread-spectrum capability, automotive temperature range compliance, factory-trimmed 33.0MHz output, and pin-configurable dither amplitude (0%, ±1%, ±2%, ±4%) and rate.
Technical Context
The DS1091LUA-330+ implements a factory-programmed master oscillator with integrated triangle-wave generator and dither-rate divider to produce center-dithered square-wave outputs. Its dither magnitude is set by SEL0/SEL1 logic states, and dither rate depends on DR pin state and output frequency per defined n-value lookup (n = 11 for fOUT = 33.0MHz).
It operates exclusively in center-dither mode (DS1091LUA variant), supports load capacitance up to 50pF, delivers 50% duty cycle below 33.3MHz, and features fast 1.02ns rise / 1.13ns fall times at 12pF load - all specified over full automotive temperature and voltage ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | Factory-set to 33.0MHz - fixed timing reference requiring no external configuration. |
| Frequency Accuracy | ±0.25% at +25°C; ±1.75% over -40°C to +125°C and 3.0V–3.6V - ensures stable clocking in harsh automotive environments. |
| Dither Type | Center-dither only (DS1091LUA variant) - shifts output symmetrically around 33.0MHz to suppress narrowband EMI peaks. |
| Dither Magnitude | PIN-selectable: 0%, ±1%, ±2%, or ±4% - enables tuning of spectral spreading depth without firmware or external components. |
| Dither Rate | Configurable via DR pin: 12.2kHz (DR = 1) or 6.1kHz (DR = 0) at 33.0MHz - balances EMI reduction efficacy and system timing margin. |
| Supply Voltage | 3.0V to 3.6V - compatible with standard automotive 3.3V rail and tolerant of battery-supply fluctuations. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and infotainment module deployment per AEC-Q100 stress requirements. |
Pinout & Package
DS1091LUA-330+ is housed in an 8-pin µMAX® package (outline 21-0036, land pattern 90-0092), RoHS-compliant and lead(Pb)-free (+ suffix), with exposed pad grounded per Maxim's substrate recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Spread-spectrum clock output | CMOS-compatible square wave; drives up to 15pF load with 50% duty cycle at 33.0MHz. |
| 2 - VCC | Power supply input | Accepts 3.0V–3.6V; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet layout guidance. |
| 3 - GND | Ground reference | Substrate-connected to ground; forms return path for output and internal oscillator currents. |
| 4 - SEL1 | Dither magnitude select (MSB) | Logic input; sets ±1%/±2%/±4% dither level together with SEL0 per Table 1. |
| 5 - SEL0 | Dither magnitude select (LSB) | Logic input; selects one of four center-dither amplitudes when paired with SEL1. |
| 6, 7 - N.C. | No connection | Internally unconnected; must remain floating or tied to GND/VCC only if required by PCB mechanical constraints. |
| 8 - DR | Dither rate select | Logic input; selects high/low dither frequency (12.2kHz / 6.1kHz) based on fOUT = 33.0MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 33.0MHz output | Eliminates need for external crystal or PLL configuration; reduces BOM count and startup complexity. |
| Pin-selectable center-dither magnitude | Four discrete dither depths (0%, ±1%, ±2%, ±4%) enable EMI optimization without software or reprogramming. |
| Automotive temperature qualification | Guaranteed operation from -40°C to +125°C meets AEC-Q100 Grade 2 thermal requirements for engine bay modules. |
| Low-jitter 33.0MHz output | 0.3% RMS jitter at 50MHz-equivalent measurement confirms timing stability for display pixel clocks and audio interfaces. |
| Fast power-up time | 0.1ms stabilization ensures clean clock assertion before microcontroller or ASIC initialization sequences begin. |
Applications
| Automotive Infotainment Systems | LCD Display Timing Modules |
|---|---|
|
Use Scenario: Clock source for multimedia SoCs and video processors in head-unit displays. IC Role / Device Role / Timing Role: Primary spread-spectrum clock generator providing EMI-compliant 33.0MHz pixel clock and system reference. Use Value: Center-dithering reduces peak radiated emissions by up to 14dB (at ±4% dither), easing CISPR 25 Class 5 compliance without shielding or layout redesign. |
Use Scenario: Timing reference for TFT-LCD column drivers and timing controllers in instrument clusters. IC Role / Device Role / Timing Role: Factory-trimmed oscillator delivering precise 33.0MHz clock with stable duty cycle across temperature. Use Value: ±1.75% frequency stability over -40°C to +125°C prevents display flicker or timing skew during cold cranking or hot soak conditions. |
| Industrial HMI Panels | POS Terminal Baseboards |
|
Use Scenario: Clock for ARM-based HMI controllers in factory automation panels exposed to wide ambient swings. IC Role / Device Role / Timing Role: Automotive-grade oscillator ensuring reliable boot and real-time operation in uncontrolled thermal environments. Use Value: 3.0V–3.6V supply range accommodates brown-out conditions common in 24V DC-powered industrial systems with LDO dropout. |
Use Scenario: System clock for payment terminal mainboards operating in retail environments with variable ambient temperatures. IC Role / Device Role / Timing Role: Low-cost, drop-in clock source replacing quartz crystals and reducing board space and component count. Use Value: 8-pin µMAX® footprint (3mm × 3mm) saves >40% area vs. standard 4-pin SMD crystal packages while maintaining same solder-reflow profile. |
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 (not factory-trimmed); supports multiple outputs; higher current draw (25mA typical). | Requires MCU firmware control; suited for multi-frequency systems, not single-fixed-clock replacements. | Choose only if dynamic frequency reconfiguration or multiple synchronized clocks are needed. |
| ICS843002AGI-01LF | Fixed 33.333MHz LVDS output; no spread-spectrum; ±50ppm stability over -40°C to +85°C only. | Limited to commercial temp range; lacks EMI reduction; incompatible pinout and interface (LVDS vs. CMOS). | Select only for non-automotive, non-EMI-sensitive applications where LVDS signaling is mandatory. |
Compared with Si5351A-B-GM and ICS843002AGI-01LF, DS1091LUA-330+ provides guaranteed automotive temperature operation, zero-firmware spread-spectrum control, and direct CMOS-compatible replacement for crystal oscillators - making it optimal for cost-sensitive, EMI-constrained, single-frequency embedded timing.
Availability
DS1091LUA-330+ is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial HMI panels, and POS terminal baseboards requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned timing performance.
Supply support for DS1091LUA-330+ 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 markets, emphasizing reliability, integration, and qualification rigor.
The DS1091LUA-330+ belongs to the EconOscillator™ family - engineered specifically for EMI reduction in cost-sensitive, high-volume automotive and industrial timing applications using pin-configurable spread-spectrum modulation.
FAQ
What is the factory-programmed output frequency of DS1091LUA-330+?
The DS1091LUA-330+ is factory-programmed to a precise 33.0MHz output frequency, confirmed in the Ordering Information table and validated across -40°C to +125°C. This fixed frequency eliminates need for external configuration or calibration, and the "330" in the part number directly denotes 33.0MHz. DS1091LUA-330+ does not support field reprogramming - its frequency is laser-trimmed during manufacturing.
Does DS1091LUA-330+ support down-dither spread spectrum?
No, DS1091LUA-330+ supports center-dither only, as indicated by the "UA" suffix (DS1091LUA = center-dither variant). Down-dither functionality is exclusive to DS1091LUB variants (e.g., DS1091LUB-033+). The DS1091LUA-330+ datasheet explicitly defines SEL0/SEL1 behavior for ±1%, ±2%, and ±4% center-symmetric modulation - no down-dither modes are implemented or electrically possible in this part number.
What is the maximum allowable load capacitance for DS1091LUA-330+?
The DS1091LUA-330+ is characterized for load capacitance up to 50pF, as specified in the AC Electrical Characteristics table. While typical operation uses 15pF (per test condition notes), the device maintains valid output waveform integrity - including duty cycle and rise/fall times - up to 50pF. Exceeding 50pF may degrade edge rates and increase jitter beyond the rated 0.3% RMS value measured at 50MHz-equivalent conditions.
Is DS1091LUA-330+ qualified to AEC-Q100 standards?
DS1091LUA-330+ is automotive temperature grade qualified (-40°C to +125°C) and marked with "/V" in ordering variants (e.g., DS1091LUA-330/V+), indicating compliance with AEC-Q100 stress testing requirements for Grade 2 devices. Though the datasheet does not list formal AEC-Q100 certificate numbers, Maxim Integrated's published qualification process, absolute maximum ratings, and recommended operating conditions align fully with AEC-Q100 Rev H thermal, electrical, and reliability criteria - confirmed by its use in production automotive infotainment modules.
How is dither rate selected on DS1091LUA-330+?
Dither rate on DS1091LUA-330+ is selected via the DR pin: logic high (DR = 1) yields 12.2kHz dither frequency, and logic low (DR = 0) yields 6.1kHz - calculated using n = 11 from Table 2 for fOUT = 33.0MHz. This rate is independent of dither magnitude setting and remains stable across temperature and supply voltage. The DS1091LUA-330+ datasheet specifies these exact values in the Typical Operating Characteristics section and Figure 1A.
DS1091LUA-330+ 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:
- Tube
- 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:
- 33MHz
- 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-330+ FAQ
1.How can I place an order for DS1091LUA-330+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-330+ 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-330+ reliable?
The price and inventory of DS1091LUA-330+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1091LUA-330+ is usually 5 days.
3.What payment methods are accepted for DS1091LUA-330+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-330+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-330+?
DS1091LUA-330+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-330+ 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-330+?
For technical support, including DS1091LUA-330+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-330+ requirements.
6.How does Aetrix verify that DS1091LUA-330+ is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-330+ 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-330+ meets industry standards.
7.What is the process for return or replacement of DS1091LUA-330+?
All DS1091LUA-330+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-330+, 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-330+ part is unused and in its original packaging.
Return procedure for DS1091LUA-330+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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