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Analog Devices Inc./Maxim Integrated DS1091LUA-055/V+T
- Part No.:
- DS1091LUA-055/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-055/V+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,797
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Product details
Overview
DS1091LUA-055/V+T from Maxim Integrated is an automotive-grade, factory-programmed spread-spectrum clock oscillator delivering a center-dithered 55.4MHz output with ±0.25% nominal accuracy at +25°C and ±1.75% over -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 a lead(Pb)-free 8-pin µMAX® package. It reduces EMI in automotive infotainment and industrial control timing paths.
For engineers reviewing the DS1091LUA-055/V+T datasheet, DS1091LUA-055/V+T pinout, DS1091LUA-055/V+T application, or DS1091LUA-055/V+T equivalent, key selection criteria include its center-spread spectrum profile, automotive temperature qualification (-40°C to +125°C), factory-trimmed 55.4MHz frequency, and pin-configurable dither control for EMI compliance in noise-sensitive systems.
Technical Context
The DS1091LUA-055/V+T implements a triangle-wave modulated master oscillator architecture to generate center-dithered spread-spectrum output. Its dither magnitude is set by SEL0/SEL1 logic states, and dither rate is selected via the DR pin, with n-value scaling dependent on output frequency per Table 2.
It integrates factory-programmed frequency generation with no external components required. Power-up behavior holds OUT low for ≤0.1ms to prevent spurious transitions, and it supports load capacitance up to 50pF while maintaining 40–60% duty cycle across its operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 55.4 MHz - factory-programmed center frequency, enabling precise system clocking without external tuning. |
| Frequency Accuracy | ±0.25% at +25°C - ensures tight initial timing alignment for high-speed digital interfaces. |
| Temperature Range | -40°C to +125°C - qualified for under-hood and dashboard-mounted automotive electronics. |
| Supply Voltage | 3.0 V to 3.6 V - compatible with modern automotive 3.3V power domains and tolerant of rail variation. |
| Dither Type | Center-dithered - spreads energy symmetrically around 55.4MHz to suppress narrowband EMI peaks. |
| Dither Magnitude | Pin-selectable: 0%, ±1%, ±2%, ±4% - allows trade-off between EMI reduction and jitter tolerance in final design. |
| Package | 8-pin µMAX® (U8+1) - compact 3mm × 3mm surface-mount footprint with RoHS-compliant lead-free finish. |
Pinout & Package
DS1091LUA-055/V+T is packaged in an 8-pin µMAX® (U8+1) package with exposed pad grounded internally. The package is RoHS-compliant, lead(Pb)-free, and optimized for thermal performance and board space efficiency in automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | CMOS-compatible spread-spectrum clock output; drives 15pF–50pF loads with <1.13ns fall time. |
| 2 | VCC | Main supply input (3.0V–3.6V); requires local 0.01µF + 0.1µF ceramic decoupling per datasheet recommendation. |
| 3 | GND | Ground reference; substrate tied to GND for stable oscillation and EMI control. |
| 4 | SEL1 | Dither magnitude MSB input; logic level selects ±1%/±2%/±4% or no dither per Table 1. |
| 5 | SEL0 | Dither magnitude LSB input; used with SEL1 to configure four discrete dither percentages. |
| 6, 7 | N.C. | No internal connection; must remain unconnected and unbonded on PCB layout. |
| 8 | DR | Dither rate selector; sets modulation frequency as function of fOUT and n-value from Table 2. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed frequency | Eliminates need for external trimming components or configuration EEPROM; 55.4MHz delivered ready-to-use. |
| Pin-selectable dither control | Enables real-time EMI optimization during system validation without firmware or hardware changes. |
| Automotive temperature qualification | Guarantees operation and parametric compliance across full AEC-Q100 Grade 0 range (-40°C to +125°C). |
| Low-jitter spread-spectrum output | RMS jitter ≤0.3% at 50MHz enables reliable sampling in high-speed serial links and display interfaces. |
| µMAX® package with exposed ground pad | Provides superior thermal dissipation and EMI shielding for dense automotive PCB layouts. |
Applications
| Automotive Infotainment | LCD Display Timing |
|---|---|
|
Use Scenario: Clock source for multimedia SoCs and video processors in head-unit systems subject to CISPR 25 Class 5 radiated emissions limits. IC Role / Device Role / Timing Role: Primary spread-spectrum system clock generator providing EMI-reduced 55.4MHz reference to GPU and display controller. Use Value: Center-dithered 55.4MHz output lowers peak radiated emissions by up to 14dB (at ±4% dither), easing EMC certification. |
Use Scenario: Timing reference for TFT-LCD column drivers and timing controllers in instrument clusters and center displays. IC Role / Device Role / Timing Role: Low-jitter, temperature-stable clock source synchronizing pixel data transfer and frame refresh cycles. Use Value: ±1.75% frequency stability over -40°C to +125°C prevents display artifacts during thermal cycling. |
| Industrial Control HMI | POS Terminal Core Clock |
|
Use Scenario: Clock for ARM-based HMIs in factory automation panels exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Automotive-qualified oscillator replacing standard XO to meet extended-life reliability requirements in harsh environments. Use Value: Lead(Pb)-free µMAX® package and guaranteed 125°C operation support long-term field deployment without derating. |
Use Scenario: System clock for payment terminal mainboards requiring FCC Part 15B compliance in retail environments. IC Role / Device Role / Timing Role: EMI-suppressing clock generator driving secure element, NFC, and display subsystems from single source. Use Value: Pin-selectable dither magnitude allows dynamic EMI tuning during regulatory pre-scan without BOM change. |
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 power consumption (20mA typical). | Requires microcontroller configuration; suited for multi-frequency systems, not drop-in replacement. | Choose when flexible frequency synthesis and multiple clocks are needed; not suitable for pin-compatible 55.4MHz replacement. |
| ICS843002AGI-01LFT | Fixed 55.4MHz LVDS oscillator with ±50ppm stability; no spread-spectrum capability; operates only to +85°C. | Lacks EMI reduction; limited temperature range excludes automotive under-hood use. | Choose only for non-automotive, non-EMI-critical applications where LVDS signaling and tighter ppm stability are prioritized. |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1091LUA-055/V+T provides factory-set 55.4MHz center-spread operation with automotive temperature range and zero-configuration deployment-making it optimal for EMI-constrained, high-reliability single-clock systems.
Availability
DS1091LUA-055/V+T is available at Aetrix Electronics and suitable for automotive infotainment, LCD display timing, and industrial HMI applications requiring stable component supply, AEC-Q100-aligned qualification, and consistent spread-spectrum EMI performance.
Supply support for DS1091LUA-055/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 as a cost-optimized, automotive-qualified spread-spectrum oscillator family targeting EMI reduction in timing-critical embedded systems without sacrificing frequency accuracy or thermal robustness.
FAQ
What is the factory-programmed output frequency of DS1091LUA-055/V+T?
The DS1091LUA-055/V+T is factory-programmed to deliver a precise 55.4MHz center-dithered spread-spectrum clock output. This frequency is trimmed and verified during manufacturing and cannot be altered in-circuit. The "055" suffix explicitly denotes the 55.4MHz specification, and the device requires no external configuration to operate at this frequency.
Does DS1091LUA-055/V+T support down-spread spectrum mode?
No, DS1091LUA-055/V+T supports center-spread spectrum only. The "UA" suffix identifies it as the center-dither variant (DS1091LUA); down-dither variants carry the "UB" suffix (e.g., DS1091LUB-055/V+T). Pin configurations and internal modulation architecture differ between UA and UB versions, and they are not interchangeable.
What are the absolute maximum ratings for VCC and input pins on DS1091LUA-055/V+T?
The DS1091LUA-055/V+T has an absolute maximum VCC rating of -0.5V to +6.0V relative to GND. Input pins (SEL0, SEL1, DR) tolerate -0.5V to (VCC + 0.5V), with the caveat that this upper limit must not exceed +6.0V. Exceeding these ratings may cause permanent damage, and operation outside recommended conditions (-40°C to +125°C, 3.0V–3.6V) is not guaranteed.
How is dither magnitude selected on DS1091LUA-055/V+T?
Dither magnitude on DS1091LUA-055/V+T is selected using the logic states of SEL0 and SEL1 pins per Table 1 in the datasheet: SEL1=0/SEL0=0 → 0% dither; SEL1=0/SEL0=1 → ±1%; SEL1=1/SEL0=0 → ±2%; SEL1=1/SEL0=1 → ±4%. These pins are CMOS-compatible and must be hard-wired to VCC or GND - no pull-ups or floating connections are permitted.
Is DS1091LUA-055/V+T compliant with automotive qualification standards?
Yes, DS1091LUA-055/V+T carries the "/V" suffix indicating full automotive qualification per AEC-Q100 Grade 0 requirements. It is specified and tested across -40°C to +125°C, features lead(Pb)-free packaging ("+"), and is supplied in tape-and-reel format ("T") for automated assembly - meeting all critical criteria for automotive electronics deployment.
DS1091LUA-055/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:
- 55.447MHz
- 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-055/V+T FAQ
1.How can I place an order for DS1091LUA-055/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-055/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-055/V+T reliable?
The price and inventory of DS1091LUA-055/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-055/V+T is usually 5 days.
3.What payment methods are accepted for DS1091LUA-055/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-055/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-055/V+T?
DS1091LUA-055/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-055/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-055/V+T?
For technical support, including DS1091LUA-055/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-055/V+T requirements.
6.How does Aetrix verify that DS1091LUA-055/V+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-055/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-055/V+T meets industry standards.
7.What is the process for return or replacement of DS1091LUA-055/V+T?
All DS1091LUA-055/V+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-055/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-055/V+T part is unused and in its original packaging.
Return procedure for DS1091LUA-055/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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