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Analog Devices Inc./Maxim Integrated DS1086LU-834+
- Part No.:
- DS1086LU-834+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1086LU-834+.pdf
- Description:
- IC SS CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,882
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Product details
Overview
DS1086LU-834+ 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 operates across -40°C to +85°C. It serves as an EMI-reducing timing source in PC peripherals and cable modems.
For engineers reviewing the DS1086LU-834+ datasheet, DS1086LU-834+ pinout, DS1086LU-834+ application, or DS1086LU-834+ equivalent, key selection criteria include its spread-spectrum dithering capability, 2-wire serial programmability, industrial temperature range, power-down current of 10μA, and μSOP-8 package compatibility with space-constrained embedded clocking designs.
Technical Context
The DS1086LU-834+ 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 two EEPROM-stored registers: OFFSET selects one of 13 overlapping 5.12MHz frequency ranges, and DAC provides 5kHz resolution within that range.
Dither magnitude (0.5%, 1%, 2%, 4%, or 8%) is controlled by JS2–JS0 bits; dither rate (fOSC/8192, /4096, or /2048) by JS4–JS3 bits; both require SPRD pin high to activate. Output enable (OE) and power-down (PDN) are synchronous, ensuring glitch-free transitions without external logic.
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. |
| Spread-Spectrum Dither Depth | 0.5%, 1%, 2%, 4%, or 8% - unidirectional downward frequency modulation to reduce peak radiated emissions by up to 15dB. |
| Supply Voltage | 2.7V to 3.6V - compatible with 3.3V logic rails and tolerant of typical board-level voltage droop. |
| Power-Down Current | 10μA at +25°C - enables low-quiescent-power sleep states in battery-backed or energy-sensitive systems. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and consumer equipment deployed in uncontrolled thermal environments. |
| Package | 8-pin μSOP (118 mils) - surface-mount footprint with 0.5mm pitch, suitable for automated assembly and compact PCB layouts. |
| Interface | 2-wire I²C-compatible serial bus - supports in-system programming during production test or field firmware updates. |
Pinout & Package
DS1086LU-834+ is housed in an 8-pin μSOP (118 mils) package with exposed pad for thermal performance. Pin numbering follows standard top-view orientation with pin 1 at top-left corner.
| 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 Input | Active-high TTL/CMOS input; enables/disables spread-spectrum modulation without reprogramming registers. |
| 3 VCC | Power Supply | 3.3V nominal supply; requires 0.1μF + 0.01μF decoupling close to pin for stable oscillation and low noise. |
| 4 GND | Ground Reference | Signal and power ground return; must be connected to low-impedance system ground plane. |
| 5 OE | Output Enable | Active-high control; places OUT in high-impedance state while master oscillator remains active - useful for clock gating. |
| 6 PDN | Power-Down Control | Active-low input; disables master oscillator and forces OUT into Hi-Z or low state per Lo/HiZ bit setting. |
| 7 SDA | Serial Data Line | Open-drain bidirectional I²C data line; requires external pull-up to VCC; supports standard/fast-mode speeds. |
| 8 SCL | Serial Clock Line | Input-only I²C clock line; synchronizes register reads/writes; rising edge latches data, falling edge outputs data. |
Key Features
| Feature | Design Value |
|---|---|
| Nonvolatile EEPROM Configuration | Registers retain settings across power cycles - eliminates boot-time initialization and supports true stand-alone operation. |
| Selectably Adjustable Dither Rate | Three dither frequencies (fOSC/8192, /4096, /2048) allow tuning spectral spreading to match EMI compliance test bandwidths. |
| Glitchless Output Enable | Synchronous OE control prevents runt pulses or metastability during clock gating - critical for deterministic system reset sequences. |
| Factory-Trimmed Default Frequency | 48.65MHz ±0.5% default output ensures immediate usability without programming - reduces qualification time for reference designs. |
| 5kHz DAC Step Size | Enables precise frequency placement within each 5.12MHz OFFSET range - supports exact generation of UART, USB, and audio sample clocks. |
Applications
| Printers & Copiers | PC Peripherals |
|---|---|
Use Scenario: High-speed laser print engine requiring low-EMI pixel clock to avoid RF interference with wireless modules and scanning sensors. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for image processing ASIC and motor control MCU. Use Value: Reduces 50–100MHz radiated emission peaks by >10dB, enabling pass/fail margin on FCC Part 15 Class B testing without added shielding. |
Use Scenario: USB 2.0 hub controller needing precise 48MHz clock with minimal conducted noise on shared VBUS rail. IC Role / Device Role / Timing Role: Configurable oscillator providing dithered reference to USB PHY layer. Use Value: Eliminates need for external spread-spectrum PLL; maintains USB packet timing integrity while lowering peak harmonic content. |
| Cable Modems | Industrial Embedded Controllers |
Use Scenario: DOCSIS-compliant cable modem operating in dense RF environments where narrowband interference must be suppressed. IC Role / Device Role / Timing Role: System clock generator for QAM demodulator and MAC processor. Use Value: 2% dither at fOSC/4096 spreads energy across 100kHz bandwidth, reducing susceptibility to adjacent-channel ingress. |
Use Scenario: DIN-rail mounted PLC CPU module requiring reliable clocking under wide ambient temperature swings and voltage transients. IC Role / Device Role / Timing Role: Standalone timing source with EEPROM-persistent configuration and power-down support. Use Value: Maintains ±0.75% frequency stability over -40°C to +85°C without calibration; 10μA power-down mode extends backup battery life. |
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 integration but requires external crystal; no built-in spread-spectrum dither. | Used where multi-frequency synthesis (e.g., CPU + DDR + PCIe clocks) is needed instead of single dithered output. | Choose Si5351A-B-GM when multiple synchronized clocks are required and external crystal layout is acceptable. |
| ICS843002AGI-01LFT | Fixed 100MHz LVDS output with factory-applied 0.25% spread; no programmability, no I²C interface, no power-down mode. | Deployed in cost-sensitive, high-volume applications where only one fixed dithered frequency suffices. | Choose ICS843002AGI-01LFT only if design locks to 100MHz and requires zero configuration effort. |
Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1086LU-834+ uniquely combines single-output spread-spectrum programmability, EEPROM persistence, and ultra-low power-down current - making it optimal for space-constrained, EMI-sensitive, and field-configurable embedded systems.
Availability
DS1086LU-834+ is available at Aetrix Electronics and suitable for printers, cable modems, and industrial embedded controllers requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle assurance.
Supply support for DS1086LU-834+ 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-834+ belongs to Maxim's EconOscillator™ family - engineered specifically to replace fixed-frequency crystals and crystal oscillators in EMI-critical digital systems through integrated spread-spectrum clock generation.
FAQ
What is the factory-default output frequency of the DS1086LU-834+?
The DS1086LU-834+ 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 remains active until reprogrammed via the 2-wire interface. The DS1086LU-834+ retains this setting in nonvolatile EEPROM, so it powers up with the same frequency across all subsequent cycles.
Can the DS1086LU-834+ operate without connecting SDA and SCL pins?
Yes - the DS1086LU-834+ can operate in stand-alone mode with SDA and SCL tied directly to VCC if in-circuit programming is never required, including during production testing. In this configuration, the device uses its factory-programmed EEPROM settings and ignores the 2-wire bus. All control remains functional via SPRD, OE, and PDN pins.
How does the DS1086LU-834+ achieve EMI reduction?
The DS1086LU-834+ reduces radiated emissions by applying unidirectional frequency dithering - shifting the output frequency downward by 0.5%, 1%, 2%, 4%, or 8% at a programmable rate (fOSC/8192 to fOSC/2048). This spreads spectral energy across a wider bandwidth, lowering peak amplitude by up to 15dB compared to a fixed-frequency oscillator.
What is the minimum load capacitance supported by the DS1086LU-834+ output?
The DS1086LU-834+ output is specified for loads from 15pF to 50pF. Driving below 15pF may cause excessive rise/fall times or overshoot due to unterminated transmission line effects. For optimal signal integrity at high frequencies (>30MHz), maintain load capacitance ≥15pF and use controlled-impedance routing with proper termination.
Does the DS1086LU-834+ support I²C fast-mode operation?
Yes - the DS1086LU-834+ supports I²C fast-mode operation at up to 400kHz on the SCL line, meeting standard-mode (100kHz) and fast-mode timing requirements per its datasheet. It complies with tSU:DAT ≥250ns and tHD:DAT ≥0ns (standard mode) or ≥0.9μs (fast mode), enabling robust communication with modern microcontrollers and FPGAs.
DS1086LU-834+ 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:
- 34MHz
- 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-834+ FAQ
1.How can I place an order for DS1086LU-834+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1086LU-834+ 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-834+ reliable?
The price and inventory of DS1086LU-834+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1086LU-834+ is usually 5 days.
3.What payment methods are accepted for DS1086LU-834+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1086LU-834+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1086LU-834+?
DS1086LU-834+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1086LU-834+ 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-834+?
For technical support, including DS1086LU-834+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1086LU-834+ requirements.
6.How does Aetrix verify that DS1086LU-834+ is sourced from the original manufacturer or authorized distributors?
All DS1086LU-834+ 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-834+ meets industry standards.
7.What is the process for return or replacement of DS1086LU-834+?
All DS1086LU-834+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1086LU-834+, 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-834+ part is unused and in its original packaging.
Return procedure for DS1086LU-834+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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