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Analog Devices Inc./Maxim Integrated DS1086LU-12F+
- Part No.:
- DS1086LU-12F+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1086LU-12F+.pdf
- Description:
- IC ECONOSILL 3.3V SS 8-USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,016
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Product details
Overview
DS1086LU-12F+ 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 depth (0.5%–8%), adjustable dither rate (fOSC/8192 to fOSC/2048), glitchless output-enable control, and power-down mode. Used in PC peripherals and cable modems to reduce EMI.
For engineers reviewing the DS1086LU-12F+ datasheet, DS1086LU-12F+ pinout, DS1086LU-12F+ application, or DS1086LU-12F+ equivalent, key selection criteria include spread-spectrum dither depth and rate configurability, industrial temperature range (−40°C to +85°C), 2-wire serial interface compatibility, and stand-alone operation without external timing components.
Technical Context
The DS1086LU-12F+ integrates a voltage-controlled master oscillator (33.3–66.6MHz), a programmable triangle-wave dither generator, and a binary prescaler (÷1 to ÷256) to produce its final output. Frequency is set via three registers: OFFSET (selects 13 frequency ranges), DAC (5kHz step resolution over selected range), and PRESCALER (controls division ratio and dither parameters).
Dither is unidirectional (downward only), with magnitude controlled by JS2–JS0 bits and rate by JS4–JS3 bits in the PRESCALER register. The device supports both processor-controlled and stand-alone modes - SDA/SCL can be tied high if in-circuit programming is unnecessary, enabling true plug-and-play deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 130kHz to 66.6MHz - covers USB, PCIe reference, Ethernet PHY, and legacy peripheral clocking needs |
| Dither Depth Options | 0.5%, 1%, 2%, 4%, or 8% - enables compliance with varying EMI standards (CISPR 22 Class B, FCC Part 15) |
| Supply Voltage | 2.7V to 3.6V - compatible with 3.3V logic rails and tolerant of typical board-level voltage variation |
| Operating Temperature | −40°C to +85°C - qualified for industrial and commercial embedded systems |
| Output Enable & Power-Down | Glitchless OE control and synchronous PDN - eliminates clock-domain metastability during sleep/wake transitions |
| Interface | 2-wire I²C-compatible (100kHz/400kHz) - allows configuration via microcontroller without dedicated programmer |
| Nonvolatile Storage | EEPROM register retention - retains programmed frequency, dither, and prescaler settings across power cycles |
Pinout & Package
DS1086LU-12F+ is housed in an 8-pin μSOP package (118 mil width), RoHS-compliant and lead(Pb)-free. Pinout supports direct integration into space-constrained PCB layouts with minimal decoupling (0.1μF + 0.01μF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT | Oscillator Output | CMOS square-wave output; drives 15pF load with 45–55% duty cycle; no external buffer required |
| SPRD | Dither Enable Input | Active-high TTL/CMOS input; enables/disables spread-spectrum modulation independently of frequency setting |
| VCC | Power Supply | 3.3V nominal supply; accepts 2.7–3.6V; requires local decoupling per layout guidelines |
| GND | Ground Reference | Analog/digital common ground; must be low-impedance connection to minimize jitter |
| OE | Output Enable | Active-high control; places OUT in high-impedance state while master oscillator remains active |
| PDN | Power-Down Control | Active-low input; disables master oscillator and reduces ICCQ to ≤10μA at +25°C |
| SDA | 2-Wire Serial Data | Open-drain bidirectional line; requires external pull-up; supports multi-drop I²C bus |
| SCL | 2-Wire Serial Clock | Input-only clock line; synchronizes register reads/writes; tolerates standard/fast-mode timing |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum EMI reduction | Up to 10dB peak spectral attenuation demonstrated at 50MHz output with 2% dither (Figure 1) |
| Factory-trimmed default frequency | 48.65MHz ±0.5% at VCC = 3.3V, TA = +25°C - enables immediate operation without programming |
| Programmable dither rate | fOSC/8192, /4096 (default), or /2048 - allows tuning dither bandwidth to avoid sensitive receiver bands |
| EEPROM write endurance | 10,000 cycles at +70°C - sufficient for production calibration and field firmware updates |
| Glitchless enable/disable sequencing | Synchronous internal state machine ensures zero-cycle clock glitches on OE/PDN transitions |
Applications
| Printers & Copiers | PC Peripherals |
|---|---|
Use Scenario: High-speed laser printer controller requiring low-EMI pixel clock for image data transfer. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for video interface ASIC, replacing fixed-frequency crystal oscillator. Use Value: Reduces radiated emissions at 50–60MHz harmonics by >8dB, eliminating need for ferrite beads or shielding cans. |
Use Scenario: USB 2.0 hub IC requiring precise 48MHz reference clock with reduced electromagnetic interference. IC Role / Device Role / Timing Role: Configurable clock generator delivering dithered 48MHz output synchronized to host controller. Use Value: Meets USB IF EMI test limits without layout redesign; factory-default 48.65MHz simplifies bring-up. |
| Cable Modems | Industrial PCs |
Use Scenario: DOCSIS 3.0 cable modem PHY needing stable, low-jitter 125MHz-derived clock (via ÷2 prescaler). IC Role / Device Role / Timing Role: Programmable master oscillator feeding downstream PLL; configured for 250MHz output ÷2 = 125MHz. Use Value: Dither depth set to 1% avoids spectral regrowth in upstream RF band; operates reliably at −40°C ambient. |
Use Scenario: Fanless industrial PC motherboard where thermal management restricts use of heat-generating clock buffers. IC Role / Device Role / Timing Role: Low-power, self-contained clock source for chipset reference, eliminating discrete crystal + buffer combo. Use Value: Active current ≤10mA at 66.6MHz/15pF; standby current ≤10μA - extends system-level power budget headroom. |
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; higher phase noise floor; no integrated spread-spectrum dither engine | Requires external MCU firmware to emulate dither; better suited for multi-clock domain systems | Choose when multiple independent frequencies are needed; not drop-in for single-output EMI reduction |
| ICS843002AGI-01LFT | Fixed 100MHz spread-spectrum oscillator; no programmability; ±50ppm stability; LVDS output | Plug-and-play but inflexible; lacks frequency/dither tuning; incompatible with CMOS loads | Choose only for cost-sensitive, single-frequency designs where EMI margin is well established |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1086LU-12F+ uniquely combines EEPROM-stored programmability, unidirectional dither, and guaranteed CMOS drive strength in a single-output, 8-pin μSOP - making it optimal for retrofitting EMI reduction into existing 3.3V designs without layout changes.
Availability
DS1086LU-12F+ is available at Aetrix Electronics and suitable for printers, cable modems, and industrial PCs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for DS1086LU-12F+ 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 and mixed-signal ICs for industrial, communications, and computing applications, with emphasis on power efficiency and signal integrity.
The DS1086LU-12F+ belongs to Maxim's EconOscillator™ family - engineered specifically for EMI reduction in cost-sensitive digital systems using spread-spectrum clocking without sacrificing frequency accuracy or startup reliability.
FAQ
What is the factory-default output frequency of the DS1086LU-12F+?
The DS1086LU-12F+ ships with a factory-programmed default master oscillator frequency of 48.65MHz ±0.5% at VCC = 3.3V and TA = +25°C. This value is stored in the OFFSET and DAC registers and enables immediate operation without I²C programming. The actual output frequency depends on the prescaler setting - for example, with prescaler = 1, DS1086LU-12F+ delivers 48.65MHz; with prescaler = 2, it delivers 24.325MHz.
Does the DS1086LU-12F+ require external passive components to operate?
No, the DS1086LU-12F+ requires no external timing components - all frequency generation is internal. Only two decoupling capacitors (0.1μF and 0.01μF) are recommended on the VCC pin per the datasheet layout guidelines. SDA and SCL lines need external pull-up resistors only if used for programming; they may be tied directly to VCC in stand-alone mode where in-circuit reconfiguration is unnecessary.
How does the dither function work in the DS1086LU-12F+?
The DS1086LU-12F+ implements unidirectional spread-spectrum dither: the output frequency is modulated downward only, by 0.5%, 1%, 2%, 4%, or 8% of the programmed center frequency. Dither is generated by a programmable triangle-wave injector into the VCO control path. The dither rate (modulation frequency) is set independently via JS4–JS3 bits and can be fOSC/8192, /4096 (default), or /2048 - allowing optimization against specific EMI peaks.
Can the DS1086LU-12F+ be used without connecting SDA and SCL pins?
Yes - the DS1086LU-12F+ supports true stand-alone operation. If the device is pre-programmed during manufacturing or never requires in-circuit reconfiguration (including production testing), SDA and SCL may be tied directly to VCC. In this mode, the device boots using its EEPROM-stored settings and functions as a fixed-frequency spread-spectrum oscillator with no serial interface overhead.
What is the power consumption of the DS1086LU-12F+ in power-down mode?
In power-down mode (PDN = low), the DS1086LU-12F+ draws ≤10μA typical supply current at +25°C, dropping to ≤1.64μA at +85°C per Figure DS1086L toc09. This ultra-low quiescent current enables use in battery-backed or energy-harvesting systems where clock circuitry must remain dormant for extended periods without draining reserves. The master oscillator and internal logic are fully disabled; only the PDN input remains active.
DS1086LU-12F+ 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:
- 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:
- 24.576MHz
- 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-12F+ FAQ
1.How can I place an order for DS1086LU-12F+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1086LU-12F+ 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-12F+ reliable?
The price and inventory of DS1086LU-12F+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1086LU-12F+ is usually 5 days.
3.What payment methods are accepted for DS1086LU-12F+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1086LU-12F+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1086LU-12F+?
DS1086LU-12F+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1086LU-12F+ 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-12F+?
For technical support, including DS1086LU-12F+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1086LU-12F+ requirements.
6.How does Aetrix verify that DS1086LU-12F+ is sourced from the original manufacturer or authorized distributors?
All DS1086LU-12F+ 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-12F+ meets industry standards.
7.What is the process for return or replacement of DS1086LU-12F+?
All DS1086LU-12F+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1086LU-12F+, 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-12F+ part is unused and in its original packaging.
Return procedure for DS1086LU-12F+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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