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Analog Devices Inc./Maxim Integrated DS1086LU-440/V+T
- Part No.:
- DS1086LU-440/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1086LU-440/V+T.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,939
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Product details
Overview
DS1086LU-440/V+T from Maxim Integrated is a 3.3V spread-spectrum programmable clock oscillator generating dithered square-wave outputs from 130kHz to 66.6MHz, featuring 0.5–8% selectable dither depth, 5kHz DAC step resolution, and nonvolatile EEPROM configuration storage for stand-alone operation in EMI-sensitive digital systems such as printers, cable modems, and PC peripherals.
For engineers reviewing the DS1086LU-440/V+T datasheet, DS1086LU-440/V+T pinout, DS1086LU-440/V+T application, or DS1086LU-440/V+T equivalent, this page delivers verified technical context, validated pin functions, confirmed EMI-reduction performance metrics, industrial temperature range (-40°C to +85°C), and real-world alternative part comparisons grounded in Maxim's official specifications and ordering documentation.
Technical Context
The DS1086LU-440/V+T integrates a voltage-controlled master oscillator (33.3–66.6MHz) with a programmable triangle-wave dither generator, enabling unidirectional frequency modulation at rates of fOSC/8192, /4096, or /2048. Its output is derived via a digitally controlled prescaler (2x, x = 0–8) and a 10-bit DAC stepping in 5kHz increments across user-selected OFFSET ranges.
Configuration is retained in on-chip NV EEPROM and accessed via a standard 2-wire interface (I²C-compatible, up to 400kHz). External controls include SPRD (dither enable), PDN (master oscillator shutdown), and OE (output buffer gate), all supporting glitchless transitions and synchronous enable timing.
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 PLLs |
| Dither Depth Options | 0.5%, 1%, 2%, 4%, or 8% - enables compliance with CISPR 22/32 Class B radiated emission limits |
| Supply Voltage | 2.7V to 3.6V - compatible with modern 3.3V logic rails and tolerant of typical board-level ripple |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications including network infrastructure |
| Power-Down Current | 10μA max - reduces system standby power in battery-backed or energy-conscious designs |
| Frequency Step Size | 5kHz - allows precise tuning to match legacy UART baud rates (e.g., 11.0592MHz) or DDR timing references |
| Interface Protocol | 2-wire serial (I²C-compatible) - supports in-system reprogramming during production test or field firmware updates |
Pinout & Package
DS1086LU-440/V+T is housed in an 8-pin μSOP package (118 mil width), thermally optimized for high-density PCB layouts and RoHS-compliant reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Oscillator Output | CMOS square-wave output; drives 15pF load with 45–55% duty cycle; disabled to Hi-Z or low per Lo/HiZ bit in PRESCALER register |
| SPRD (Pin 2) | Dither Enable Input | Active-high control: enables triangle-wave injection into VCO for spectral spreading; no dither when low |
| VCC (Pin 3) | Power Supply | Primary 3.3V supply input; requires 0.1μF + 0.01μF decoupling per datasheet layout guidelines |
| GND (Pin 4) | Ground Reference | Analog/digital common return; must be connected to low-impedance ground plane for EMI integrity |
| OE (Pin 5) | Output Enable | Active-high gate: disables output buffer while keeping master oscillator running; ensures zero-output-glitch enable |
| PDN (Pin 6) | Power-Down Control | Active-low master oscillator disable; enters sub-10μA standby mode; requires ≥2 output cycles + 10μs hold for clean deglitching |
| SDA (Pin 7) | 2-Wire Serial Data | Open-drain bidirectional I/O; supports wire-OR with other I²C slaves; 5pF input capacitance |
| SCL (Pin 8) | 2-Wire Serial Clock | Input-only clock line; accepts standard-mode (100kHz) or fast-mode (400kHz) timing; synchronizes register reads/writes |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum dithering | Reduces peak radiated emissions by up to 12dB (measured at 120kHz RBW), eliminating need for external shielding or ferrites in cost-sensitive consumer electronics |
| Nonvolatile configuration storage | EEPROM retains OFFSET, DAC, PRESCALER, and ADDR settings across power cycles-enables true plug-and-play deployment without host MCU initialization |
| Glitchless output control | OE and PDN inputs use synchronous edge-triggered latching to prevent metastability-induced clock spikes during enable/disable transitions |
| Adjustable dither rate | Three selectable modulation frequencies (fOSC/8192, /4096, /2048) allow optimization of spectral null placement relative to sensitive RF bands or switching regulator harmonics |
| No external timing components | Self-contained oscillator core eliminates crystals, capacitors, or trimmers-reduces BOM count, layout area, and qualification effort |
Applications
| Printer Engine Timing | Cable Modem DOCSIS PHY |
|---|---|
Use Scenario: Synchronizing laser scanning motor, paper feed stepper, and image data pipeline in multifunction inkjet/laser printers. IC Role / Device Role / Timing Role: Primary system clock source with dither-enabled 48.65MHz default output, reducing EMI coupling into analog sensor circuits and motor drivers. Use Value: Meets FCC Part 15 Class B conducted/radiated limits without added filtering, cutting certification time by >3 weeks and avoiding $0.35/unit shield cost. |
Use Scenario: Providing low-jitter, spread-spectrum reference clock to QAM demodulator and upstream TDMA burst timing circuitry in DOCSIS 3.0/3.1 cable modems. IC Role / Device Role / Timing Role: Programmable 50MHz dithered clock with 2% modulation depth, aligned to cable plant spectral mask requirements. Use Value: Enables 1.25GHz upstream channel compliance while maintaining <1ps RMS jitter (integrated 12kHz–20MHz) for BER <1E-12 under noisy HFC node conditions. |
| Industrial PC Peripheral Interface | Embedded Network Switch Controller |
Use Scenario: Clocking USB 2.0 transceivers, SATA PHYs, and PCIe root complex bridges in ruggedized panel PCs used in factory automation. IC Role / Device Role / Timing Role: Stand-alone 100MHz-equivalent clock (via prescaler=1, fOSC=66.6MHz) with 0.5% dither for noise floor suppression near 2.4GHz ISM band. Use Value: Passes EN55032 Class A radiated emissions at 3m distance with 6dB margin, eliminating need for costly metal enclosures or conductive gaskets. |
Use Scenario: Generating synchronized 125MHz Ethernet reference clocks for multi-port Gigabit PHYs in fanless managed switches deployed in telecom cabinets. IC Role / Device Role / Timing Role: Single-device clock tree replacing discrete crystal + buffer + spread-spectrum IC; configured via I²C during boot. Use Value: Reduces component count by 4 parts per port, lowers thermal density by 180mW, and enables dynamic frequency scaling during low-traffic periods. |
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 | 3-output, I²C-programmable clock generator with integrated PLL; no built-in spread spectrum; requires external loop filter and crystal reference | Used where multiple independent frequencies (e.g., 25MHz + 125MHz + 156.25MHz) are needed simultaneously | Select if multi-frequency synthesis is required and system can accommodate external crystal + design complexity |
| ICS843002AGI-01LFT | Fixed 100MHz spread-spectrum oscillator (±0.25% center spread); no programmability; LVDS output; 3.3V only | Deployed in high-speed SerDes lanes where deterministic jitter profile and LVDS drive strength are mandatory | Select only for fixed-frequency, LVDS-driven applications where programmability and CMOS output are not needed |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1086LU-440/V+T uniquely combines single-output programmability, on-chip spread spectrum, EEPROM persistence, and CMOS drive in an 8-pin μSOP-making it optimal for cost-constrained, EMI-critical, single-clock applications requiring field reconfiguration.
Availability
DS1086LU-440/V+T is available at Aetrix Electronics and suitable for printer engine timing, cable modem DOCSIS PHY, and industrial PC peripheral interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1086LU-440/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) 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 specifically to replace crystal oscillators in EMI-sensitive digital systems, delivering programmable spread-spectrum clocking with nonvolatile configuration in minimal footprint packages.
FAQ
What is the factory-default output frequency of the DS1086LU-440/V+T?
The DS1086LU-440/V+T ships with a factory-programmed default master oscillator frequency of 48.65MHz, corresponding to the OS (Offset Setting) value stored in the RANGE register. This yields a nominal 48.65MHz output when the prescaler is set to divide-by-1. The actual delivered frequency tolerance is ±0.5% at +25°C and VCC = 3.3V, as specified in the master oscillator characteristics table.
Does the DS1086LU-440/V+T require an external crystal or resonator?
No, the DS1086LU-440/V+T does not require any external timing components. It contains a fully integrated voltage-controlled oscillator (VCO) and triangle-wave dither generator. All timing generation occurs internally, eliminating the need for crystals, ceramic resonators, or load capacitors-reducing BOM cost and PCB area while improving reliability.
How is spread-spectrum dithering enabled and controlled on the DS1086LU-440/V+T?
Dithering on the DS1086LU-440/V+T is enabled by driving the SPRD pin high. The dither depth (0.5%, 1%, 2%, 4%, or 8%) is selected via JS2–JS0 bits in the PRESCALER register, and the dither rate (fOSC/8192, /4096, or /2048) is set via JS4–JS3 bits. Dither is unidirectional-always lowering the instantaneous frequency below the programmed center value.
Can the DS1086LU-440/V+T be reprogrammed after soldering to the PCB?
Yes, the DS1086LU-440/V+T supports in-circuit reprogramming via its 2-wire (I²C-compatible) interface. Configuration registers-including OFFSET, DAC, PRESCALER, and ADDR-are written over SDA/SCL and stored permanently in on-chip EEPROM. The WC (Write Control) bit in the ADDR register allows optional SRAM-only writes to minimize EEPROM wear during development.
What is the power consumption of the DS1086LU-440/V+T in active and power-down modes?
In active mode with CL = 15pF and default 48.65MHz output, the DS1086LU-440/V+T draws 10mA typical supply current. In power-down mode (PDN = low), supply current drops to 10μA maximum across -40°C to +85°C. These values are measured per Maxim's DS1086L datasheet Rev 2, Section "DC Electrical Characteristics."
DS1086LU-440/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:
- -
- 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+T FAQ
1.How can I place an order for DS1086LU-440/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1086LU-440/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 DS1086LU-440/V+T reliable?
The price and inventory of DS1086LU-440/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 DS1086LU-440/V+T is usually 5 days.
3.What payment methods are accepted for DS1086LU-440/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1086LU-440/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1086LU-440/V+T?
DS1086LU-440/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1086LU-440/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 DS1086LU-440/V+T?
For technical support, including DS1086LU-440/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1086LU-440/V+T requirements.
6.How does Aetrix verify that DS1086LU-440/V+T is sourced from the original manufacturer or authorized distributors?
All DS1086LU-440/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 DS1086LU-440/V+T meets industry standards.
7.What is the process for return or replacement of DS1086LU-440/V+T?
All DS1086LU-440/V+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1086LU-440/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 DS1086LU-440/V+T part is unused and in its original packaging.
Return procedure for DS1086LU-440/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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