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Analog Devices Inc./Maxim Integrated DS1086LU-C02+
- Part No.:
- DS1086LU-C02+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1086LU-C02+.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
DS1086LU-C02+ from Maxim Integrated is a 3.3V spread-spectrum programmable clock oscillator with nonvolatile EEPROM configuration, generating dithered square-wave outputs from 130kHz to 66.6MHz. It features selectable dither magnitudes (0.5%, 1%, 2%, 4%, or 8%), adjustable dither rate via prescaler control, and dual power management pins (PDN for master oscillator disable, OE for output buffer enable/disable). It serves as an EMI-reduction timing source in printer mainboards and cable modem PHY layers.
For engineers reviewing the DS1086LU-C02+ datasheet, DS1086LU-C02+ pinout, DS1086LU-C02+ application, or DS1086LU-C02+ equivalent, key selection criteria include spread-spectrum dither depth and rate configurability, 2-wire serial interface address flexibility (A2–A0), industrial temperature operation (–40°C to +85°C), and guaranteed 10,000 EEPROM write cycles for field reprogramming.
Technical Context
The DS1086LU-C02+ integrates a voltage-controlled master oscillator (33.3–66.6MHz) whose frequency is set by a 10-bit DAC (5kHz step size) and a 5-bit OFFSET register selecting one of 13 overlapping 5.12MHz ranges. A triangle-wave generator injects unidirectional frequency deviation controlled by JS2–JS0 bits (0.5%–8%) and modulated at rates determined by JS4–JS3 (fOSC/8192, /4096, or /2048).
Its 2-wire interface supports standard- and fast-mode (100kHz/400kHz), with EEPROM write cycle time of 10ms and automatic SRAM-to-EEPROM commit when WC=0. Power-down mode draws ≤10μA, and glitchless OE control ensures clean output enable/disable transitions synchronized to internal clock edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 130kHz to 66.6MHz - covers USB 12MHz, PCIe 100MHz/2nd harmonic, and Ethernet 25MHz reference needs via prescaling |
| Dither Magnitude Options | 0.5%, 1%, 2%, 4%, or 8% - enables compliance with CISPR 22 Class B radiated emission limits across varied board layouts |
| Supply Voltage Range | 2.7V to 3.6V - compatible with 3.3V LDO rails and tolerant of ±10% regulation variation |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded systems without derating |
| EEPROM Endurance | 10,000 write cycles - supports factory calibration, field firmware updates, and design iteration without wear-out risk |
| Power-Down Current | ≤10μA at +85°C - enables low-quiescent-power sleep states in battery-backed peripherals |
| Output Enable Propagation | 200μs max to oscillation start after OE assertion - ensures deterministic timing recovery in wake-up sequences |
Pinout & Package
DS1086LU-C02+ is housed in an 8-pin μSOP package (118 mil width), pin-compatible with industry-standard 8-lead micro-SOP footprints and optimized for high-density PCB layouts with minimal parasitic capacitance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT | Oscillator output | CMOS square-wave output; 45–55% duty cycle over full temp/voltage range; drives 15pF load at up to 66.6MHz |
| SPRD | Dither enable input | Active-high logic control; enables/disables triangle-wave injection into VCO control path without affecting DAC or OFFSET registers |
| VCC | Power supply | 3.3V nominal; requires 0.1μF + 0.01μF decoupling per datasheet layout guidance to suppress switching noise |
| GND | Ground reference | Single ground plane connection point; must be tied directly to system ground with low-inductance path |
| OE | Output enable | Glitchless synchronous gate; places OUT in high-impedance state while master oscillator remains active |
| PDN | Power-down control | Asynchronous master oscillator disable; forces full chip shutdown with ≤10μA quiescent current |
| SDA | 2-wire serial data | Open-drain I/O; requires external pull-up; supports multi-drop bus with up to 8 devices via A2–A0 addressing |
| SCL | 2-wire serial clock | Input-only clock line; defines timing for EEPROM register reads/writes and supports 400kHz fast-mode operation |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile configuration storage | All register settings (DAC, OFFSET, PRESCALER, ADDR) retained in EEPROM; no external configuration required at power-up |
| Selectably dithered output | Dither magnitude and rate independently programmable - enables EMI reduction tuning without hardware change |
| Glitchless output enable | OE control synchronizes to internal clock edge - eliminates runt pulses or metastability during enable/disable transitions |
| Adjustable master oscillator range | OFFSET register selects one of 13 overlapping 5.12MHz bands; DAC fine-tunes within band in 5kHz steps |
| Industrial-grade thermal stability | ±0.75% frequency tolerance over –40°C to +85°C at default 48.65MHz; <±2.5% worst-case across full 33.3–66.6MHz range |
Applications
| Printer Mainboard Clocking | Cable Modem PHY Reference |
|---|---|
Use Scenario: Synchronizing print engine timing, ASIC interfaces, and USB 2.0 transceivers in multifunction printers. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for SoC and peripheral controllers; replaces fixed-frequency crystal + PLL solutions. Use Value: Reduces peak radiated emissions by >10dB at fundamental and harmonic frequencies, easing FCC Part 15 Class B certification. |
Use Scenario: Providing jitter-tolerant 25MHz or 50MHz reference to DOCSIS-compliant PHY ICs in residential cable modems. IC Role / Device Role / Timing Role: Programmable EMI-compliant clock generator feeding SERDES and analog front-end blocks. Use Value: Adjustable dither rate (fOSC/4096 default) aligns spectral spreading with cable upstream channel nulls, minimizing in-band interference. |
| PC Peripheral Controller | Industrial Scanner Timing |
Use Scenario: Clocking USB hub controllers, SD card interfaces, and display drivers in docking stations and expansion cards. IC Role / Device Role / Timing Role: Standalone programmable oscillator eliminating need for external crystals and configuration jumpers. Use Value: Factory-programmed frequency and dither settings reduce BOM count and eliminate post-assembly trimming. |
Use Scenario: Driving line-scan CCD sensors and image processing ASICs in document scanners operating in harsh industrial environments. IC Role / Device Role / Timing Role: Temperature-stable, reprogrammable clock source supporting variable scan rates and resolution modes. Use Value: EEPROM-based configuration allows field updates for new sensor models without PCB revision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable spread-spectrum oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5351A-B-GM | 3-output, I²C-programmable clock generator; higher phase noise floor; no integrated spread-spectrum dither engine | Requires external dither circuitry or MCU-based modulation for EMI reduction | Choose when multi-output synchronization or sub-100kHz fractional synthesis is required |
| ICS843002AGI-01LFT | Fixed 0.5% dither; no user-selectable dither rate or magnitude; LVDS output; 3.3V only | Limited to single dither profile; not reprogrammable in-system | Choose for cost-sensitive, high-volume designs where dither parameters never change |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1086LU-C02+ uniquely integrates configurable dither magnitude and rate in a single-output, EEPROM-configurable oscillator - simplifying EMI compliance without external components or firmware overhead.
Availability
DS1086LU-C02+ is available at Aetrix Electronics and suitable for printer mainboards, cable modem PHY layers, PC peripheral controllers, and industrial scanner timing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1086LU-C02+ 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 industrial, communications, and computing applications.
The DS1086LU-C02+ belongs to the EconOscillator™ family - engineered specifically for EMI reduction in cost-sensitive digital systems using programmable spread-spectrum clock generation without external components.
FAQ
What is the factory-default output frequency of the DS1086LU-C02+?
The DS1086LU-C02+ ships with a factory-programmed default master oscillator frequency of 48.65MHz. This value is stored in the RANGE register and used as the baseline (OS) for OFFSET register calculations. The actual output frequency depends on the programmed prescaler value - for example, with prescaler = 1, DS1086LU-C02+ delivers 48.65MHz; with prescaler = 4, it delivers 12.1625MHz. All defaults are retained in nonvolatile EEPROM.
Can the DS1086LU-C02+ operate without connecting SDA and SCL pins?
Yes - the DS1086LU-C02+ can operate in stand-alone mode with SDA and SCL tied high (via 4.7kΩ pull-ups), provided all required frequency, dither, and control settings are pre-programmed into EEPROM during manufacturing. In this configuration, the device functions as a fixed-output spread-spectrum oscillator with no runtime reconfiguration capability, reducing BOM count and layout complexity.
How does the dither rate affect EMI reduction performance in the DS1086LU-C02+?
The DS1086LU-C02+ dither rate - set by JS4–JS3 bits to fOSC/8192, /4096 (default), or /2048 - determines the modulation frequency of the spread spectrum. Lower dither rates (e.g., /8192) produce narrower spectral spreading ideal for narrowband interference suppression, while higher rates (e.g., /2048) broaden the spectrum more aggressively, improving broadband EMI margin. Rate selection must balance spectral shape against system sensitivity to low-frequency modulation sidebands.
What is the maximum capacitive load the DS1086LU-C02+ output can drive reliably?
The DS1086LU-C02+ output is characterized for reliable operation with a 15pF load across its full 130kHz–66.6MHz frequency range and –40°C to +85°C temperature range. At 66.6MHz, output voltage swing degrades above 15pF; for loads up to 50pF (per AC specs), operation is guaranteed only below 25MHz. For higher-frequency, higher-capacitance applications, a fanout buffer or series resistor should be added to maintain signal integrity and meet rise/fall time requirements.
Does the DS1086LU-C02+ support I²C fast-mode-plus (1MHz) operation?
No - the DS1086LU-C02+ supports standard-mode (100kHz) and fast-mode (400kHz) I²C communication only, as specified in its AC Electrical Characteristics table. Fast-mode-plus timing parameters (e.g., tF, tR, tSU:DAT) are not characterized or guaranteed. Attempting 1MHz operation may result in unreliable register reads/writes or EEPROM corruption due to insufficient setup/hold margins on SDA/SCL lines.
DS1086LU-C02+ 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:
- -
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
DS1086LU-C02+ FAQ
1.How can I place an order for DS1086LU-C02+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1086LU-C02+ 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-C02+ reliable?
The price and inventory of DS1086LU-C02+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1086LU-C02+ is usually 5 days.
3.What payment methods are accepted for DS1086LU-C02+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1086LU-C02+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1086LU-C02+?
DS1086LU-C02+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1086LU-C02+ 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-C02+?
For technical support, including DS1086LU-C02+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1086LU-C02+ requirements.
6.How does Aetrix verify that DS1086LU-C02+ is sourced from the original manufacturer or authorized distributors?
All DS1086LU-C02+ 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-C02+ meets industry standards.
7.What is the process for return or replacement of DS1086LU-C02+?
All DS1086LU-C02+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1086LU-C02+, 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-C02+ part is unused and in its original packaging.
Return procedure for DS1086LU-C02+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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