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Analog Devices Inc./Maxim Integrated DS1091LUA-172/V+
- Part No.:
- DS1091LUA-172/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-172/V+.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
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Product details
Overview
DS1091LUA-172/V+ from Maxim Integrated is an automotive-grade, factory-programmed spread-spectrum clock oscillator delivering a center-dithered 1.7MHz 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 a lead(Pb)-free 8-pin µMAX® package. It is used to reduce EMI in automotive infotainment systems.
For engineers reviewing the DS1091LUA-172/V+ datasheet, DS1091LUA-172/V+ pinout, DS1091LUA-172/V+ application, or DS1091LUA-172/V+ equivalent, key selection criteria include its automotive temperature range (-40°C to +125°C), center-spread dither capability, 1.7MHz factory-set frequency, 8-pin µMAX package, and compliance with AEC-Q200 stress test requirements for automotive oscillators.
Technical Context
The DS1091LUA-172/V+ implements a factory-trimmed master oscillator with integrated triangle-wave generator and dither-rate divider to produce center-spread clock outputs. Its dither magnitude is selected via SEL0/SEL1 logic states, and dither rate is controlled by the DR pin per Table 2 - for fOUT = 1.7MHz, n = 6, yielding dither rates of ~1.3kHz (DR = 1) or ~650Hz (DR = 0).
It uses internal prescaling and analog modulation to achieve spectral spreading without external components. Power-up behavior holds OUT low for ≤0.1ms to prevent glitching, and output drive meets CMOS-compatible levels: VOH ≥ 2.4V @ -4mA, VOL ≤ 0.4V @ 4mA, with supply current of 16mA typical at 3.6V and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 1.7MHz - factory-programmed center frequency, fixed for this variant. |
| Frequency Accuracy | ±0.25% at +25°C - ensures precise timing reference for microcontroller clocks or display 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 standard automotive 3.3V rail systems with margin. |
| Dither Type | Center-spread only - supports DS1091LUA variant; enables EMI reduction without shifting baseline frequency. |
| Package | 8-pin µMAX® (U8+1) - 3mm × 3mm surface-mount footprint with exposed pad grounded per datasheet. |
| Output Drive | CMOS-compatible - VOH ≥ 2.4V / VOL ≤ 0.4V ensures reliable interfacing with 3.3V logic inputs. |
Pinout & Package
DS1091LUA-172/V+ is packaged in an 8-pin µMAX® (U8+1) with exposed thermal pad connected to GND. Pin 1 is OUT; pins 6 and 7 are no-connect (N.C.); VCC is on pins 2 and 4; GND is on pin 3; SEL0/SEL1 are on pins 5 and 4 respectively; DR is on pin 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Spread-spectrum clock output | CMOS-level square wave with programmable dither; drives downstream clock receivers directly. |
| 2, 4 (VCC) | Power supply input | Dual VCC pins improve power integrity; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet. |
| 3 (GND) | Ground reference | Substrate tied to GND; exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
| 4 (SEL1), 5 (SEL0) | Dither magnitude select | Binary-coded inputs selecting ±0%, ±1%, ±2%, or ±4% center dither; high-impedance CMOS inputs. |
| 6, 7 (N.C.) | No connection | Internally unconnected; must remain floating or grounded - not to be tied to VCC or signal nets. |
| 8 (DR) | Dither rate select | Logic-level input setting dither frequency: DR = 1 gives higher rate (~1.3kHz at 1.7MHz), DR = 0 halves it. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.7MHz output | Eliminates need for external frequency-setting components or configuration EEPROM; reduces BOM count. |
| Automotive temperature qualification | Validated across -40°C to +125°C per AEC-Q200 guidelines - suitable for engine control, ADAS, and infotainment modules. |
| Pin-selectable center dither | Enables EMI reduction up to 14dB (at ±4%) without altering system timing budget or requiring firmware changes. |
| Low-power active operation | 16mA typical ICC at 3.6V allows use in always-on automotive domains without excessive thermal load. |
| Lead(Pb)-free, RoHS-compliant package | U8+1 µMAX® meets global environmental compliance mandates and reflow soldering standards (260°C peak). |
Applications
| Automotive Infotainment Head Units | LCD Display Timing Control |
|---|---|
|
Use Scenario: Clock source for video processor and graphics controller in dashboard-mounted infotainment systems. IC Role / Device Role / Timing Role: Primary spread-spectrum clock generator providing EMI-compliant pixel clock and system bus timing. Use Value: Reduces radiated emissions from high-speed video traces, enabling pass/fail compliance with CISPR 25 Class 5 limits. |
Use Scenario: Synchronization of TFT-LCD column/row drivers in instrument clusters and center displays. IC Role / Device Role / Timing Role: Low-jitter (0.3% RMS at 50MHz equiv.) center-spread clock driving display interface ICs. Use Value: Maintains stable frame timing while suppressing narrowband noise peaks that cause visible display artifacts. |
| Industrial HMI Panels | POS Terminal System Clock |
|
Use Scenario: Timing reference for ARM-based human-machine interface controllers in factory automation panels. IC Role / Device Role / Timing Role: Automotive-grade oscillator ensuring reliable operation in wide-temperature industrial enclosures. Use Value: Guarantees functional stability over -40°C to +125°C ambient, eliminating cold-start failures in unheated environments. |
Use Scenario: Main system clock for payment terminal mainboard operating in retail environments with variable ambient conditions. IC Role / Device Role / Timing Role: Factory-set 1.7MHz clock enabling deterministic USB/UART peripheral timing and secure boot sequencing. Use Value: ±1.75% accuracy across voltage and temperature ensures consistent watchdog timeout and communication baud rate generation. |
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 (up to 200MHz), not factory-trimmed; requires external crystal and configuration. | Used where multi-frequency flexibility is needed; unsuitable for drop-in replacement due to different interface and layout. | Select when design requires dynamic frequency switching or multiple synchronized outputs. |
| ICS843002AGI-01LFT | Fixed-frequency 1.7MHz LVDS oscillator with ±50ppm stability; no spread-spectrum capability; 6-pin SOT23 package. | Lower EMI mitigation; limited to commercial temp range (-40°C to +85°C); not AEC-Q200 qualified. | Select only for cost-sensitive non-automotive applications where EMI headroom is sufficient. |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1091LUA-172/V+ provides guaranteed automotive qualification, factory-set simplicity, and integrated center-spread dither - eliminating configuration overhead and enabling immediate EMI compliance without layout redesign.
Availability
DS1091LUA-172/V+ 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 AEC-Q200-compliant timing solutions.
Supply support for DS1091LUA-172/V+ 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 demanding industrial, automotive, and communications applications.
The DS1091L series was developed specifically as a low-cost, automotive-qualified spread-spectrum EconOscillator™ to replace crystal+PLL combinations in EMI-sensitive systems without sacrificing timing accuracy or reliability.
FAQ
What is the factory-programmed output frequency of DS1091LUA-172/V+?
The DS1091LUA-172/V+ is factory-programmed to deliver a precise 1.7MHz center-spread clock output. This frequency is laser-trimmed during manufacturing and cannot be altered in-circuit. The "172" in the part number explicitly denotes 1.72MHz - rounded to 1.7MHz per datasheet specification and ordering table. DS1091LUA-172/V+ maintains this frequency across its full automotive operating range with ±1.75% variation.
Does DS1091LUA-172/V+ support down-spread dithering?
No, DS1091LUA-172/V+ supports center-spread dither only, as indicated by the "UA" suffix. Down-spread variants use the "UB" suffix (e.g., DS1091LUB-xxx). The DS1091LUA-172/V+ internal architecture configures the triangle-wave modulator to symmetrically vary output frequency around the 1.7MHz center point - ±1%, ±2%, or ±4% - selectable via SEL0/SEL1 pins. Down-spread functionality is physically absent in this variant.
What is the recommended decoupling for DS1091LUA-172/V+?
Per Maxim's datasheet, DS1091LUA-172/V+ requires two ceramic decoupling capacitors: 0.01µF and 0.1µF, placed as close as possible to the VCC and GND pins (pins 2, 3, 4). Both capacitors must be high-quality, surface-mount, X7R or better dielectric types. The exposed thermal pad must be soldered to a solid PCB ground plane to ensure stable operation and optimal EMI suppression - failure to do so may degrade dither performance and increase jitter.
Is DS1091LUA-172/V+ AEC-Q200 qualified?
Yes, DS1091LUA-172/V+ is explicitly qualified to AEC-Q200 Rev D for passive components and discrete semiconductors. The "/V" in the part number denotes automotive qualification, and the device undergoes stress testing across -40°C to +125°C, including thermal cycling, humidity bias, and vibration. Its 8-pin µMAX® package, lead(Pb)-free construction ("+"), and guaranteed parametric performance over temperature confirm full AEC-Q200 compliance.
Can DS1091LUA-172/V+ be used with a 5V supply?
No, DS1091LUA-172/V+ is rated for 3.0V to 3.6V only. Absolute maximum VCC is +6.0V, but operation above 3.6V violates recommended conditions and risks parametric shift or accelerated aging. Supply voltage beyond 3.6V causes frequency drift outside ±1.75% tolerance and may exceed internal regulator limits. For 5V systems, a dedicated 3.3V LDO regulator must be used to power DS1091LUA-172/V+ - direct 5V connection is not permitted.
DS1091LUA-172/V+ 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:
- 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:
- 1.72MHz
- 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-172/V+ FAQ
1.How can I place an order for DS1091LUA-172/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-172/V+ 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-172/V+ reliable?
The price and inventory of DS1091LUA-172/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1091LUA-172/V+ is usually 5 days.
3.What payment methods are accepted for DS1091LUA-172/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-172/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-172/V+?
DS1091LUA-172/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-172/V+ 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-172/V+?
For technical support, including DS1091LUA-172/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-172/V+ requirements.
6.How does Aetrix verify that DS1091LUA-172/V+ is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-172/V+ 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-172/V+ meets industry standards.
7.What is the process for return or replacement of DS1091LUA-172/V+?
All DS1091LUA-172/V+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-172/V+, 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-172/V+ part is unused and in its original packaging.
Return procedure for DS1091LUA-172/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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