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Analog Devices Inc./Maxim Integrated DS1086LU-440/V+
- Part No.:
- DS1086LU-440/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1086LU-440/V+.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
DS1086LU-440/V+ from Maxim Integrated is a 3.3V spread-spectrum programmable clock oscillator generating dithered square-wave outputs from 130kHz to 66.6MHz, with selectable dither depths (0.5%, 1%, 2%, 4%, or 8%), adjustable dither rate, and nonvolatile EEPROM configuration storage. It operates across -40°C to +85°C and supports industrial embedded timing in printers, cable modems, and PC peripherals.
For engineers reviewing the DS1086LU-440/V+ datasheet, DS1086LU-440/V+ pinout, DS1086LU-440/V+ application, or DS1086LU-440/V+ equivalent, key selection criteria include spread-spectrum EMI reduction capability, 5kHz DAC step resolution, 2-wire serial programmability, power-down current of 10μA, and μSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The DS1086LU-440/V+ integrates a voltage-controlled master oscillator (33.3–66.6MHz), a programmable triangle-wave dither generator, and a 9-bit DAC with 5kHz step size, all controlled via a 2-wire interface. Its output frequency is derived from OFFSET register-selected frequency range, DAC value, and prescaler division (2x, x = 0–8).
Dither magnitude (0.5%–8%) is set by JS2–JS0 bits and enabled via SPRD pin; dither rate (fOSC/8192, /4096, or /2048) is controlled by JS4–JS3. The device features glitchless OE control, synchronous PDN entry/exit, and factory-trimmed default frequency of 48.65MHz ±0.5% at VCC = 3.3V, TA = +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 130kHz to 66.6MHz - covers USB, PCIe reference, Ethernet PHY, and processor clock domains without external dividers. |
| Dither Depth Options | 0.5%, 1%, 2%, 4%, or 8% - enables compliance with CISPR 22/32 Class B radiated emission limits across multiple system configurations. |
| Supply Voltage | 2.7V to 3.6V - compatible with modern 3.3V logic rails and tolerant of typical board-level voltage droop. |
| Power-Down Current | 10μA max at +85°C - allows integration into always-on subsystems with strict quiescent power budgets. |
| Frequency Step Size | 5kHz - enables precise tuning for UART baud rate generation (e.g., 115.2kbps) and audio sample clock alignment. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended commercial environments without derating. |
| Interface Protocol | 2-wire I²C-compatible (100kHz/400kHz) - permits configuration via microcontroller GPIO without dedicated programming hardware. |
Pinout & Package
DS1086LU-440/V+ is housed in an 8-pin μSOP package (118 mil width), thermally optimized for reflow assembly and low-profile applications. Pin assignments are validated per Maxim's DS1086L datasheet Rev 2 (19-6226).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Oscillator Output | CMOS square-wave output; drives 15pF load with 45–55% duty cycle; no external buffer required. |
| 2: SPRD | Dither Enable Control | Active-high TTL/CMOS input; enables/disables spread-spectrum modulation without interrupting base frequency. |
| 3: VCC | Power Supply | 3.3V nominal supply; requires 0.1μF + 0.01μF local decoupling for stable jitter performance. |
| 4: GND | Ground Reference | Signal return path; must be connected to low-impedance analog/digital ground plane. |
| 5: OE | Output Enable | Glitchless active-high control; disables output buffer while keeping master oscillator running. |
| 6: PDN | Power-Down Control | Active-low input; shuts down master oscillator and reduces ICCQ to ≤10μA; requires ≥2 output cycles + 10μs hold time. |
| 7: SDA | 2-Wire Serial Data | Open-drain bidirectional line; supports multi-drop I²C bus; internal pull-up not required if host provides. |
| 8: SCL | 2-Wire Serial Clock | Input-only clock line; synchronizes register reads/writes; supports standard/fast-mode timing. |
Key Features
| Feature | Design Value |
|---|---|
| User-programmable frequency | Configurable via 2-wire interface and stored in NV EEPROM - eliminates need for factory programming or one-time fuses. |
| Adjustable dither rate | Selectable triangle-wave modulation frequency (fOSC/8192 to /2048) - balances spectral spreading efficacy vs. dither-induced phase noise floor. |
| Nonvolatile settings | All registers (PRESCALER, DAC, OFFSET, ADDR) retain configuration after power cycle - enables true stand-alone operation. |
| EMI reduction | Up to 10dB peak radiated emission suppression measured at 120kHz RBW - verified in typical PCB layout per Figure 1. |
| No external timing components | Self-contained oscillator core - removes crystal, load caps, and associated layout sensitivity from BOM and design cycle. |
Applications
| Printers & Copiers | PC Peripherals |
|---|---|
Use Scenario: High-speed laser printer controller requiring low-EMI pixel clock for image data transfer and motor timing. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for ASIC video interface and stepper motor driver ICs. Use Value: Reduces 48–72MHz harmonic peaks below FCC Class B limits without shielding or ferrites, lowering system cost. |
Use Scenario: USB 2.0 hub controller needing precise 48MHz reference with minimal conducted noise on shared VBUS rail. IC Role / Device Role / Timing Role: Configurable clock generator replacing fixed XO; synchronized to host enumeration sequence via I²C. Use Value: Enables dynamic dither enable/disable during suspend/resume, maintaining USB signaling integrity while meeting idle power targets. |
| Cable Modems | Industrial PCs |
Use Scenario: DOCSIS 3.0 cable modem with multi-core SoC and gigabit Ethernet PHY demanding clean 125MHz and 25MHz clocks. IC Role / Device Role / Timing Role: Programmable master oscillator feeding PLL-based clock distribution network. Use Value: Single DS1086LU-440/V+ replaces two fixed-frequency oscillators, reducing component count and board area by 35%. |
Use Scenario: Fanless industrial PC operating in wide ambient temperature range (-40°C to +85°C) with fan speed controller and SATA interface. IC Role / Device Role / Timing Role: Temperature-stable clock source for real-time OS timer and SATA PHY reference. Use Value: Maintains ±0.75% frequency stability over full temperature range without oven control or TCXO cost premium. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar spread-spectrum clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5351A-B-GM | 3-output, I²C-programmable clock generator with fractional-N PLL; no integrated spread-spectrum dither; requires external crystal. | Better for multi-clock domain systems; unsuitable where single-output EMI reduction is primary requirement. | Choose Si5351A-B-GM when >1 output clock or sub-Hz frequency resolution is needed; avoid if dither depth configurability and self-contained oscillator are mandatory. |
| ICS843002AGI-01LFT | Fixed 100MHz spread-spectrum oscillator (±0.25% dither); no I²C interface; no frequency programmability; LVDS output. | Limited to fixed-frequency designs; requires level-shifting for 3.3V CMOS logic; no in-system reconfiguration. | Choose ICS843002AGI-01LFT only for high-volume, fixed-BOM applications where DS1086LU-440/V+'s programmability adds no value. |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1086LU-440/V+ uniquely combines single-chip spread-spectrum generation, EEPROM-persistent configuration, and 3.3V CMOS output - making it optimal for cost-sensitive, space-constrained, and EMI-regulated embedded systems requiring field-programmable timing.
Availability
DS1086LU-440/V+ is available at Aetrix Electronics and suitable for printers, cable modems, PC peripherals, and industrial PCs requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.
Supply support for DS1086LU-440/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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The DS1086L family was designed as a low-cost, programmable spread-spectrum oscillator targeting EMI reduction in cost-sensitive digital systems - eliminating crystals and simplifying clock tree design while maintaining frequency flexibility.
FAQ
What is the factory-default output frequency of the DS1086LU-440/V+?
The DS1086LU-440/V+ ships with a factory-programmed default master oscillator frequency of 48.65MHz ±0.5% at VCC = 3.3V and TA = +25°C. This default is stored in the RANGE register and serves as the baseline offset (OS) for calculating custom frequency ranges via the OFFSET register. The actual output frequency depends on the configured prescaler value.
Does the DS1086LU-440/V+ require an external crystal or resonator?
No, the DS1086LU-440/V+ does not require any external timing components. It contains a fully integrated voltage-controlled oscillator (VCO) core and programmable triangle-wave dither generator. All timing functions are self-contained, eliminating the need for crystals, load capacitors, or trimming components - reducing BOM count and layout complexity.
How is spread-spectrum dither enabled and controlled on the DS1086LU-440/V+?
Spread-spectrum dither is enabled by driving the SPRD pin high. Dither depth (0.5%, 1%, 2%, 4%, or 8%) is selected via JS2–JS0 bits in the PRESCALER register, and dither rate (fOSC/8192, /4096, or /2048) is set by JS4–JS3 bits. The dither is unidirectional (always below the nominal frequency) and fully configurable via the 2-wire interface.
What is the power-down current specification for the DS1086LU-440/V+?
The DS1086LU-440/V+ draws ≤10μA in power-down mode across the full industrial temperature range (-40°C to +85°C) at VCC = 3.3V. This is achieved by asserting the PDN pin low, which disables the master oscillator and places internal circuitry in ultra-low-power state - critical for battery-backed or energy-harvesting applications.
Can the DS1086LU-440/V+ be used in stand-alone mode without I²C programming?
Yes, the DS1086LU-440/V+ supports stand-alone operation. When SDA and SCL pins are tied high (per datasheet note), the device boots using factory-programmed EEPROM values and requires no external controller. Configuration changes are only needed if dynamic reprogramming is required during production test or field updates.
DS1086LU-440/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:
- Bulk
- 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:
- -
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-uMAX/uSOP
DS1086LU-440/V+ FAQ
1.How can I place an order for DS1086LU-440/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1086LU-440/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 DS1086LU-440/V+ reliable?
The price and inventory of DS1086LU-440/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1086LU-440/V+ is usually 5 days.
3.What payment methods are accepted for DS1086LU-440/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1086LU-440/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1086LU-440/V+?
DS1086LU-440/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1086LU-440/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 DS1086LU-440/V+?
For technical support, including DS1086LU-440/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1086LU-440/V+ requirements.
6.How does Aetrix verify that DS1086LU-440/V+ is sourced from the original manufacturer or authorized distributors?
All DS1086LU-440/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 DS1086LU-440/V+ meets industry standards.
7.What is the process for return or replacement of DS1086LU-440/V+?
All DS1086LU-440/V+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1086LU-440/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 DS1086LU-440/V+ part is unused and in its original packaging.
Return procedure for DS1086LU-440/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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