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Analog Devices Inc./Maxim Integrated DS1091LUA-172/V+T
- Part No.:
- DS1091LUA-172/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1091LUA-172/V+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,033
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Product details
Overview
DS1091LUA-172/V+T 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, ±1.75% across -40°C to +125°C, and 3.0V–3.6V supply operation in an 8-pin µMAX package. It reduces EMI in infotainment systems and industrial control units via pin-selectable dither magnitude (0%, ±1%, ±2%, ±4%) and rate.
For engineers reviewing the DS1091LUA-172/V+T datasheet, DS1091LUA-172/V+T pinout, DS1091LUA-172/V+T application, or DS1091LUA-172/V+T equivalent, key selection criteria include automotive temperature compliance (-40°C to +125°C), center-spread dither capability, 1.7MHz factory-set frequency, µMAX package footprint, and RoHS-compliant lead-free construction.
Technical Context
The DS1091LUA-172/V+T 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 DR pin state per Table 2 - for fOUT = 1.7MHz, n = 6 yields dither rates of ~1.4kHz (DR = 1) or ~700Hz (DR = 0).
It operates exclusively in center-dither mode (DS1091LUA variant), not down-dither. Power-up behavior holds OUT low for ≤0.1ms before stable oscillation, preventing false triggering in automotive power-rail sequencing. All timing parameters are guaranteed over full automotive voltage (3.0V–3.6V) and temperature (-40°C to +125°C) ranges.
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 sync generators. |
| Temperature Stability | ±1.75% over -40°C to +125°C - maintains functional timing margin in under-hood automotive environments. |
| Supply Voltage | 3.0V to 3.6V - compatible with standard automotive 3.3V rail without level-shifting. |
| Dither Capability | Center-spread only, 0%/±1%/±2%/±4% - reduces peak radiated emissions by up to 14dB (at ±4%) without altering system timing budget. |
| Output Rise/Fall Time | 1.02ns / 1.13ns (12pF load) - supports clean edge integrity into typical CMOS loads with minimal jitter contribution. |
| Operating Temperature | -40°C to +125°C - qualified per AEC-Q100 requirements for automotive infotainment and body electronics. |
Pinout & Package
Package: 8-pin µMAX (U8+1), RoHS-compliant, lead(Pb)-free, 3mm × 3mm body, 0.65mm pitch, exposed pad grounded.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Spread-spectrum clock output | CMOS-compatible square wave; drives downstream logic or PLL reference inputs directly. |
| 2 - VCC | Power supply input | Accepts 3.0V–3.6V; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet recommendation. |
| 3 - GND | Ground reference | Substrate-connected to ground; must be low-impedance return path for noise-sensitive clock output. |
| 4 - SEL1 | Dither magnitude select (MSB) | Logic input; sets ±1%/±2%/±4% or 0% dither with SEL0 per Table 1 (DS1091LUA only). |
| 5 - SEL0 | Dither magnitude select (LSB) | Logic input; used with SEL1 to configure dither percentage; high-impedance CMOS input. |
| 6, 7 - N.C. | No connection | Internally unconnected; must remain floating or tied to GND/VCC per layout best practice (not driven). |
| 8 - DR | Dither rate select | Logic input; selects fast/slow dither modulation rate based on output frequency (n = 6 for 1.7MHz). |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1.7MHz center frequency | Eliminates external crystal or trimming components; reduces BOM count and board space in cost-sensitive automotive modules. |
| Pin-selectable center-spread dither (0%/±1%/±2%/±4%) | Enables EMI reduction tuning without firmware or hardware changes - critical for passing CISPR 25 Class 5 radiated emissions tests. |
| Automotive temperature range (-40°C to +125°C) | Guarantees stable clock operation in engine bay, head unit, or ADAS ECUs where ambient thermal stress exceeds commercial grade limits. |
| Low-power active supply current (16mA typ.) | Minimizes thermal load and power rail burden in always-on vehicle subsystems such as telematics gateways. |
| µMAX package with grounded substrate | Provides superior EMI shielding and thermal conduction vs. SOIC; supports high-density automotive PCB layouts. |
Applications
| Automotive Infotainment Head Units | Industrial HMI Panels |
|---|---|
|
Use Scenario: Clocking audio/video processors and display controllers in dashboard-mounted infotainment systems subject to stringent CISPR 25 radiated emissions limits. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for SoC reference and pixel clock generation. Use Value: Center-dithered 1.7MHz output suppresses narrowband EMI peaks by up to 14dB, enabling pass-fail compliance without metal shielding or costly layout rework. |
Use Scenario: Providing stable timing for ARM-based HMIs in factory automation panels operating near variable-frequency drives. IC Role / Device Role / Timing Role: Low-jitter system clock for microcontroller peripherals and touch-screen controller interfaces. Use Value: ±1.75% stability over -40°C to +125°C ensures reliable UART/SPI communication and display refresh timing despite ambient thermal cycling. |
| POS Terminal Base Stations | Automotive Body Control Modules |
|
Use Scenario: Synchronizing secure payment processing and thermal printer drivers in retail POS terminals deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Factory-set timing reference for cryptographic co-processors and serial interface bridges. Use Value: 3.0V–3.6V operation and 0.1ms power-up time ensure deterministic boot sequence alignment with host MCU reset release. |
Use Scenario: Clocking LIN transceivers and sensor signal conditioners in door module ECUs exposed to under-door thermal and vibration stress. IC Role / Device Role / Timing Role: Robust, low-noise clock source for analog-to-digital conversion and PWM generation. Use Value: Grounded-substrate µMAX package minimizes coupling of mechanical vibration-induced noise into timing path, preserving ADC sampling integrity. |
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 3 outputs); requires external crystal; ±50ppm stability; no automotive temp rating. | Used in prototyping and non-automotive consumer devices needing multi-frequency flexibility. | Select only if programmability and multiple outputs outweigh need for AEC-Q100 qualification and fixed-frequency simplicity. |
| ICS843002AGI-01LFT | Fixed 1.7MHz LVDS oscillator; no spread-spectrum; ±50ppm; -40°C to +85°C industrial grade. | Suitable for non-EMI-critical industrial control where dither is unnecessary and extended temperature is not required. | Choose when EMI suppression is not mandated and cost sensitivity favors simpler, non-dithered timing. |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, the DS1091LUA-172/V+T uniquely delivers AEC-Q100-compliant center-spread dither at 1.7MHz in a single-chip, crystalless, drop-in solution - eliminating configuration overhead and extending thermal operating margin beyond industrial alternatives.
Availability
DS1091LUA-172/V+T is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI panels, and body control modules requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for DS1091LUA-172/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 targets EMI-sensitive automotive and industrial applications requiring factory-programmed, spread-spectrum clock sources with guaranteed automotive temperature performance and minimal external components.
FAQ
What is the factory-programmed output frequency of DS1091LUA-172/V+T?
The DS1091LUA-172/V+T 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 1.7MHz (172 → 1.72MHz rounded to 1.7MHz per datasheet ordering table). DS1091LUA-172/V+T does not support frequency reprogramming or external tuning.
Does DS1091LUA-172/V+T support down-spread dithering?
No, DS1091LUA-172/V+T supports center-spread dither only, as indicated by the "UA" suffix (DS1091LUA = center-dither variant). Down-spread dither is exclusive to DS1091LUB variants. Attempting to configure down-dither behavior on DS1091LUA-172/V+T will result in no dither or undefined output - the device ignores invalid SEL0/SEL1 combinations for down-dither modes.
What is the maximum dither rate achievable for DS1091LUA-172/V+T at 1.7MHz?
For DS1091LUA-172/V+T operating at 1.7MHz, Table 2 specifies n = 6. With DR = 1, the dither rate is fOUT / 2n = 1.7MHz / 12 ≈ 141.7kHz; with DR = 0, it is half that (~70.8kHz). These rates are fixed by internal divider architecture and cannot be adjusted beyond the two DR-selectable options. DS1091LUA-172/V+T does not support continuous dither-rate tuning.
Is DS1091LUA-172/V+T pin-compatible with other DS1091L variants in the µMAX package?
Yes, all DS1091L variants - including DS1091LUA-172/V+T, DS1091LUA-033/V+T, and DS1091LUB-027/V+T - share identical 8-pin µMAX (U8+1) pinout and footprint. Pin functions (OUT, VCC, GND, SEL0, SEL1, DR, N.C.) are consistent across the family, enabling direct PCB reuse when migrating between frequencies or dither types, provided system-level dither configuration logic is updated accordingly.
What decoupling capacitance is recommended for DS1091LUA-172/V+T?
Per Maxim's datasheet, DS1091LUA-172/V+T requires two parallel ceramic decoupling capacitors: 0.01µF and 0.1µF, placed as close as possible to pins 2 (VCC) and 3 (GND). These values minimize high-frequency supply noise and prevent output jitter degradation. X7R or C0G dielectrics are preferred; placement within 2mm of the µMAX pads is critical to maintain sub-nanosecond edge integrity and meet automotive EMI targets.
DS1091LUA-172/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:
- 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+T FAQ
1.How can I place an order for DS1091LUA-172/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1091LUA-172/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-172/V+T reliable?
The price and inventory of DS1091LUA-172/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-172/V+T is usually 5 days.
3.What payment methods are accepted for DS1091LUA-172/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1091LUA-172/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1091LUA-172/V+T?
DS1091LUA-172/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1091LUA-172/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-172/V+T?
For technical support, including DS1091LUA-172/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1091LUA-172/V+T requirements.
6.How does Aetrix verify that DS1091LUA-172/V+T is sourced from the original manufacturer or authorized distributors?
All DS1091LUA-172/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-172/V+T meets industry standards.
7.What is the process for return or replacement of DS1091LUA-172/V+T?
All DS1091LUA-172/V+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1091LUA-172/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-172/V+T part is unused and in its original packaging.
Return procedure for DS1091LUA-172/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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