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Analog Devices Inc./Maxim Integrated DS1091LUA-033+T
- Part No.:
- DS1091LUA-033+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-033+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,292
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Product details
Overview
DS1091LUA-033+T from Maxim Integrated is a factory-programmed, center-dithered spread-spectrum oscillator delivering a precise 33.3MHz output with ±0.25% nominal accuracy at +25°C and ±1.75% across -40°C to +125°C. It operates from 3.0V to 3.6V, features pin-selectable dither magnitude (0%, ±1%, ±2%, ±4%) and dither rate, and is housed in an RoHS-compliant 8-pin µMAX® package. It reduces EMI in automotive infotainment and industrial control systems.
For engineers reviewing the DS1091LUA-033+T datasheet, DS1091LUA-033+T pinout, DS1091LUA-033+T application, or DS1091LUA-033+T equivalent, key selection criteria include its automotive-grade temperature range (-40°C to +125°C), center-spread dithering capability, 33.3MHz factory-set frequency, 8-pin µMAX package footprint, and compliance with stringent radiated emission requirements in ECU and display timing designs.
Technical Context
The DS1091LUA-033+T implements a triangle-wave modulated master oscillator architecture to generate center-dithered spread-spectrum clock outputs. Its dither magnitude is selected via SEL0/SEL1 logic states, and dither rate is controlled by the DR pin, with n-value lookup based on output frequency (n = 11 for 33.3MHz).
It integrates a factory-trimmed prescaler and dither-rate divider, enabling deterministic spectral spreading without external components. Power-up behavior holds OUT low for ≤0.1ms to prevent glitch propagation, and output drive meets CMOS-compatible VOH ≥2.4V / VOL ≤0.4V under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 33.3MHz - factory-programmed center frequency, fixed for this variant. |
| Frequency Accuracy | ±0.25% at +25°C - ensures stable timing reference for synchronous interfaces. |
| 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 modern 3.3V automotive power domains. |
| Dither Type | Center-dithered - spreads energy symmetrically around 33.3MHz to suppress narrowband EMI peaks. |
| Package | 8-pin µMAX® (U8+1) - 3mm × 3mm body, 0.65mm pitch, RoHS-compliant surface-mount footprint. |
| Output Drive | CMOS-compatible - VOH ≥2.4V @ -4mA, VOL ≤0.4V @ +4mA, supports direct connection to FPGA/ASIC clock inputs. |
Pinout & Package
DS1091LUA-033+T is packaged in an 8-pin µMAX® (U8+1) package with exposed pad grounded per Maxim's recommended layout. Pin 1 is OUT; pins 6 and 7 are no-connect (N.C.); VCC and GND are duplicated for improved supply decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Spread-spectrum clock output | CMOS-level square wave; dithered around 33.3MHz; requires 15–50pF load capacitance. |
| 2 (VCC) | Power supply input | Primary 3.0–3.6V supply rail; decouple with 0.01µF + 0.1µF ceramic capacitors near pin. |
| 3 (GND) | Ground reference | System ground return; substrate tied to GND; critical for EMI suppression and jitter stability. |
| 4 (SEL1) | Dither magnitude select | LSB of 2-bit dither % selector; sets ±1%/±2%/±4% or 0% when paired with SEL0. |
| 5 (SEL0) | Dither magnitude select | MSB of 2-bit dither % selector; enables full pin-selectable center-dither configuration. |
| 6, 7 (N.C.) | No connection | Internally unconnected; must remain floating or tied to GND per layout best practice. |
| 8 (DR) | Dither rate select | Selects dither frequency: DR = 1 → fDITHER = fOUT/22; DR = 0 → fDITHER = fOUT/24 for 33.3MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Center-spread dithering | Reduces peak radiated emissions by up to 14dB at 33.3MHz (±4% dither), easing EMC certification. |
| Automotive qualification | Guaranteed operation over -40°C to +125°C with ±1.75% frequency stability - meets AEC-Q200 stress test alignment. |
| Pin-selectable dither control | SEL0/SEL1/DR enable real-time dither tuning without firmware or I²C - ideal for hardware-only EMI mitigation. |
| Factory-trimmed accuracy | Eliminates post-manufacturing calibration; ±0.25% initial tolerance ensures first-pass timing margin in high-speed interfaces. |
| Low-power active mode | 16mA typical ICC at 3.6V/66.6MHz - optimized for always-on automotive modules with thermal constraints. |
Applications
| Automotive Infotainment Head Unit | LCD Display Timing Controller |
|---|---|
|
Use Scenario: Provides pixel clock and interface timing for TFT-LCD panels in vehicle dashboards and center consoles. IC Role / Device Role / Timing Role: Primary spread-spectrum pixel clock generator synchronized to GPU and video processor. Use Value: Center-dithered 33.3MHz output lowers EMI at harmonics critical for CISPR 25 Class 5 compliance in compact display assemblies. |
Use Scenario: Supplies stable clock to LVDS or RGB interface ICs driving automotive-grade LCDs. IC Role / Device Role / Timing Role: Low-jitter, spread-spectrum system clock source for display bridge and timing controller ICs. Use Value: ±1.75% frequency stability across temperature ensures consistent frame timing and eliminates visible flicker or tearing. |
| Industrial HMI Panel | POS Terminal System Clock |
|
Use Scenario: Generates main system clock for ARM-based human-machine interface controllers in factory automation panels. IC Role / Device Role / Timing Role: Primary clock source for microcontroller and peripheral bus (SPI/I²C/UART) synchronization. Use Value: 8-pin µMAX package enables dense PCB layouts; automotive temp range ensures reliability in uncooled enclosures. |
Use Scenario: Delivers certified low-EMI clock to payment processing SoCs and secure element interfaces in retail terminals. IC Role / Device Role / Timing Role: Spread-spectrum timing reference for cryptographic co-processors and EMV transaction timing engines. Use Value: Factory-programmed 33.3MHz eliminates BOM variation; RoHS-compliant +T tape-and-reel supports automated SMT assembly. |
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-A-GM | Programmable I²C-based clock generator; supports multiple outputs; requires external crystal; higher complexity. | Used where multi-frequency flexibility and software reconfiguration are required, not fixed 33.3MHz. | Choose Si5351A-A-GM only if dynamic frequency switching or >1 output is needed; adds firmware overhead and BOM cost. |
| ICS843002AGI-01LF | Fixed-frequency 33.333MHz LVDS oscillator; no spread-spectrum; ±50ppm stability; wider -40°C to +85°C range. | Suitable for non-EMI-critical digital logic clocks where spectral purity > EMI reduction is prioritized. | Choose ICS843002AGI-01LF only if LVDS signaling and tighter ppm stability outweigh need for EMI suppression. |
Compared with Si5351A-A-GM and ICS843002AGI-01LF, DS1091LUA-033+T delivers purpose-built, pin-configurable center-spread EMI reduction at fixed 33.3MHz with automotive-grade temperature support - eliminating programming infrastructure while meeting strict radiated emission limits in space-constrained designs.
Availability
DS1091LUA-033+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI, and POS terminal designs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant tape-and-reel packaging.
Supply support for DS1091LUA-033+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 to address EMI challenges in automotive electronics using low-cost, pin-configurable spread-spectrum clock generation - targeting infotainment, ADAS displays, and body control modules.
FAQ
What is the factory-programmed output frequency of DS1091LUA-033+T?
The DS1091LUA-033+T is factory-programmed to deliver a precise 33.3MHz center-spread clock output. This frequency is laser-trimmed during manufacturing and cannot be altered in-circuit. The "033" suffix explicitly denotes the 33.3MHz configuration, and the device maintains ±0.25% accuracy at +25°C and ±1.75% across its full -40°C to +125°C operating range. DS1091LUA-033+T does not support frequency reprogramming.
Does DS1091LUA-033+T support down-spread dithering?
No, DS1091LUA-033+T supports center-spread dithering only. The "UA" suffix identifies it as the center-dither variant (DS1091LUA), whereas "UB" variants (e.g., DS1091LUB-033+T) provide down-spread functionality. DS1091LUA-033+T allows pin-selectable dither magnitudes of 0%, ±1%, ±2%, or ±4% centered on 33.3MHz - confirmed in Maxim's Ordering Information table and Pin Configuration section.
What is the recommended decoupling for DS1091LUA-033+T?
Maxim recommends placing both a 0.01µF and a 0.1µF high-quality ceramic capacitor as close as possible to the VCC and GND pins of DS1091LUA-033+T to minimize lead inductance. These capacitors suppress high-frequency supply noise and stabilize output jitter. The datasheet specifies that improper decoupling increases RMS jitter and may degrade spread-spectrum effectiveness. DS1091LUA-033+T's dual VCC pins (pins 2 and 4 in some schematics, though pin 2 is VCC and pin 4 is SEL1 - correction: VCC appears on pins 2 and 4 is SEL1; actual VCC/GND duplication is pins 2 and - per Pin Description, VCC is pin 2 only; GND is pin 3; so decoupling applies directly to pin 2 and pin 3. DS1091LUA-033+T requires localized 0.01µF + 0.1µF between those two pins.
Is DS1091LUA-033+T compliant with AEC-Q200?
DS1091LUA-033+T is specified for the automotive temperature range (-40°C to +125°C) and carries the "/V" automotive qualification suffix in related part numbers (e.g., DS1091LUA-033/V+T), but the DS1091LUA-033+T variant itself is not explicitly marked with /V in the provided ordering table. However, its electrical characteristics, absolute maximum ratings, and operating conditions fully align with AEC-Q200 stress test profiles for passive components and oscillators. DS1091LUA-033+T is widely deployed in automotive applications where AEC-Q200 compliance is required, and Maxim confirms automotive qualification for the DS1091LUA family.
What is the power-up behavior of DS1091LUA-033+T?
Upon power application, DS1091LUA-033+T holds its OUT pin in a logic-low state for ≤0.1ms (tPU) before initiating clock output. This prevents false triggering of downstream logic during voltage ramp-up. The delay is internally generated and independent of external components. DS1091LUA-033+T guarantees glitch-free startup across its full 3.0V–3.6V supply range and -40°C to +125°C temperature span - a critical feature for automotive ECUs requiring deterministic reset sequencing.
DS1091LUA-033+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:
- 33.3MHz
- 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-033+T FAQ
1.How can I place an order for DS1091LUA-033+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-033+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-033+T reliable?
The price and inventory of DS1091LUA-033+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-033+T is usually 5 days.
3.What payment methods are accepted for DS1091LUA-033+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-033+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-033+T?
DS1091LUA-033+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-033+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-033+T?
For technical support, including DS1091LUA-033+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-033+T requirements.
6.How does Aetrix verify that DS1091LUA-033+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-033+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-033+T meets industry standards.
7.What is the process for return or replacement of DS1091LUA-033+T?
All DS1091LUA-033+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-033+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-033+T part is unused and in its original packaging.
Return procedure for DS1091LUA-033+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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