My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1094LU-42M+
- Part No.:
- DS1094LU-42M+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1094LU-42M+.pdf
- Description:
- IC CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,328
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1094LU-42M+ from Maxim Integrated is a multiphase spread-spectrum silicon oscillator IC generating four dithered square-wave outputs for switched-mode power supply clocking. It delivers programmable output frequencies from 2MHz to 31.25kHz in two-, three-, or four-phase modes, with 0/2/4/8% dither capability and nonvolatile configuration storage. Its primary system role is timing control for multi-phase DC-DC converters.
For engineers reviewing the DS1094LU-42M+ datasheet, DS1094LU-42M+ pinout, DS1094LU-42M+ application, or DS1094LU-42M+ equivalent, key selection criteria include spread-spectrum EMI reduction capability, I²C-programmable phase count and dither rate, -40°C to +85°C operating range, 8-pin µSOP package compatibility, and factory-programmable NV memory retention.
Technical Context
The DS1094LU-42M+ integrates a master oscillator (1–2MHz, programmable in 100kHz steps), prescaler (÷1/÷2/÷4/÷8), triangle-wave generator for frequency dithering, and a two-phase/three-phase/four-phase output generator-all controlled via I²C interface. Its architecture enables precise spectral energy spreading without external timing components.
Output duty cycles are fixed per mode: 50% in two- and four-phase, 33.3% in three-phase. The device uses internal DAC-based frequency synthesis and stores configuration in EEPROM, supporting both user programming and factory preconfiguration with write-control bit (WC) for wear-leveling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Phases | Configurable two-, three-, or four-phase square-wave outputs for interleaved DC-DC converter control |
| Frequency Range | 2MHz to 31.25kHz output; master oscillator programmable 1–2MHz in 100kHz steps |
| Dither Capability | Selectable 0%, 2%, 4%, or 8% peak-to-peak frequency modulation to reduce EMI emissions |
| Supply Voltage | 3.0V to 3.6V operation-compatible with standard 3.3V logic and power rails |
| Operating Temp | -40°C to +85°C-qualified for industrial-grade embedded power systems |
| I²C Interface | Standard-mode and fast-mode (up to 400kHz) 2-wire serial interface with 7-bit slave address (B0h default) |
| Package | 8-pin µSOP (2.0mm × 2.5mm, 0.5mm pitch)-surface-mount compatible with high-density PCB layouts |
Pinout & Package
DS1094LU-42M+ is housed in an 8-pin µSOP package (2.0mm × 2.5mm, 0.5mm pitch) with exposed substrate connected to GND for thermal and EMI performance. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Primary square-wave output; phase-aligned per selected mode (2φ/3φ/4φ) |
| 2 | OUT2 | Secondary output; 180° out-of-phase in 2φ mode, 120° in 3φ, 90° in 4φ |
| 3 | VCC | Positive supply input (3.0–3.6V); requires local 0.01µF + 0.1µF ceramic decoupling |
| 4 | GND | Ground reference; substrate tied to this pin for low-impedance return path |
| 5 | OUT3 | Third output; active only in 3φ or 4φ mode; 120° or 90° phase shift respectively |
| 6 | OUT4 | Fourth output; active only in 4φ mode; 90° phase shift from OUT1 |
| 7 | SDA | Open-drain I²C data line; requires external pull-up resistor (typically 2.2–10kΩ) |
| 8 | SCL | I²C clock input; accepts CMOS or open-drain drivers; no clock stretching |
Key Features
| Feature | Design Value |
|---|---|
| EconOscillator™ Architecture | Integrated master oscillator + prescaler + triangle-wave dither generator eliminates need for external crystals or RC networks |
| Multiphase Output Flexibility | Runtime-selectable 2/3/4-phase modes enable optimal interleaving for 2-, 3-, or 4-phase buck converters |
| EMI Reduction via Dithering | Programmable 2%/4%/8% frequency modulation spreads spectral energy, reducing peak EMI by >10dB in conducted emissions tests |
| Nonvolatile Configuration | EEPROM stores all register settings-including DAC, prescaler, phase, dither, and address-retaining state across power cycles |
| I²C Programmability | Full register access (DAC, PRESCALER, ADDR, WRITE EE) via standard 2-wire interface supports field reconfiguration and BOM consolidation |
Applications
| Multi-Phase Buck Converters | Server VRMs |
|---|---|
|
Use Scenario: Interleaved DC-DC conversion in high-current CPU/GPU voltage regulator modules where phase staggering reduces input/output ripple and thermal stress. IC Role / Device Role / Timing Role: Primary clock generator providing synchronized, dithered, multiphase timing signals to gate drivers of parallel MOSFETs. Use Value: Enables 30–50% reduction in input capacitor size and 15–25% lower RMS inductor current versus single-phase designs. |
Use Scenario: High-efficiency, low-noise power delivery in enterprise servers requiring strict EMC compliance and thermal management. IC Role / Device Role / Timing Role: Spread-spectrum clock source for multi-rail VRMs powering CPUs, memory, and I/O subsystems. Use Value: Meets CISPR 22 Class B conducted emissions limits without added shielding or ferrites, lowering system BOM cost. |
| Industrial SMPS | Laser Printer Power Supplies |
|
Use Scenario: Compact, high-reliability AC-DC and isolated DC-DC converters in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Configurable oscillator driving synchronous rectification and PWM controllers in flyback/forward topologies. Use Value: Factory-programmed dither and phase settings eliminate post-manufacture calibration, accelerating time-to-market. |
Use Scenario: High-voltage, high-switching-frequency power supplies for laser diode drivers and fuser heating elements. IC Role / Device Role / Timing Role: Four-phase clock generator enabling staggered switching to minimize transformer saturation and audible noise. Use Value: Reduces 20–100kHz acoustic noise by >12dB and improves thermal derating margin by 8°C at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase spread-spectrum oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5351A-B-GM | 3-output, I²C-programmable clock generator with PLL-based architecture; no built-in spread-spectrum dither; higher jitter (±50ppm vs. ±2.5% freq tolerance) | Used in communication clocks and FPGA reference timing-not optimized for SMPS EMI reduction | Choose when multi-frequency synthesis (not just dithered SMPS clocking) is required; requires external loop filter and VCO |
| LMK61E2-100M00 | Single-output, ultra-low-jitter LVDS oscillator; no I²C interface, no dither, no phase generation; fixed 100MHz output | Targeted at high-speed serial interfaces (PCIe, SATA), not power conversion | Choose only for precision reference clocking where EMI suppression and multiphase control are irrelevant |
Compared with Si5351A-B-GM and LMK61E2-100M00, DS1094LU-42M+ uniquely combines factory-programmable spread-spectrum dither, true multiphase output generation, and nonvolatile SMPS-optimized configuration in a single 8-pin µSOP-eliminating external components and simplifying layout for power designers.
Availability
DS1094LU-42M+ is available at Aetrix Electronics and suitable for switched-mode power supplies, server VRMs, and industrial DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1094LU-42M+ 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 analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1094LU-42M+ belongs to Maxim's EconOscillator™ family-designed specifically to replace crystal-based clock sources in power conversion systems with integrated, programmable, EMI-reducing oscillators.
FAQ
What is the maximum dither frequency supported by the DS1094LU-42M+?
The DS1094LU-42M+ supports dither frequencies of fMOSC/128, fMOSC/256, fMOSC/512, or fMOSC/1024-selected via bits D1/D0 in the PRESCALER register. With a 2MHz master oscillator, the highest dither frequency is 15.625kHz. This modulation rate is optimized to suppress fundamental and harmonic EMI peaks without affecting converter stability or transient response in the DS1094LU-42M+.
Can the DS1094LU-42M+ operate in three-phase mode with 33.3% duty cycle on all outputs?
Yes-the DS1094LU-42M+ generates true three-phase outputs with precisely 33.3% duty cycle and 120° phase separation when configured via bits Ph1/Ph0 = 01 in the PRESCALER register. This mode is explicitly characterized and guaranteed in the datasheet, and is used in three-phase buck converters to balance current sharing and minimize input ripple. The DS1094LU-42M+ maintains this duty cycle across its full operating temperature and voltage range.
Does the DS1094LU-42M+ require external pull-up resistors on SDA and SCL?
Yes-SDA is open-drain and requires an external pull-up resistor (typically 2.2–10kΩ); SCL also benefits from a pull-up to prevent floating during stand-alone operation. The DS1094LU-42M+ does not include internal pull-ups. Pull-up values must ensure rise/fall times meet I²C specifications (≤300ns) under bus capacitance ≤400pF, as defined in the DS1094LU-42M+ AC Electrical Characteristics table.
How many times can the EEPROM in the DS1094LU-42M+ be written before wear-out?
The DS1094LU-42M+ EEPROM is rated for 10,000 write cycles at +70°C, as specified in the Nonvolatile Memory Characteristics table. To extend endurance, the WC (Write Control) bit in the ADDR register allows SRAM-only updates until a dedicated WRITE EE command is issued-reducing EEPROM writes to only intentional configuration commits. This feature is critical for dynamic frequency tuning applications using the DS1094LU-42M+.
Is the DS1094LU-42M+ pin-compatible with other devices in the DS1094L family?
Yes-the DS1094LU-42M+ shares identical 8-pin µSOP pinout, electrical characteristics, and register map with all DS1094L variants (e.g., DS1094LU-100M+, DS1094LU-25M+). Frequency-specific versions differ only in factory-programmed DAC and prescaler defaults; all retain full runtime reprogrammability via I²C. This enables drop-in replacement and BOM rationalization across DS1094L family members including the DS1094LU-42M+.
DS1094LU-42M+ 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:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Generator
- PLL:
- No
- Input:
- Clock
- Output:
- Clock
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:4
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 2MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
DS1094LU-42M+ FAQ
1.How can I place an order for DS1094LU-42M+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1094LU-42M+ 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 DS1094LU-42M+ reliable?
The price and inventory of DS1094LU-42M+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1094LU-42M+ is usually 5 days.
3.What payment methods are accepted for DS1094LU-42M+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1094LU-42M+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1094LU-42M+?
DS1094LU-42M+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1094LU-42M+ 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 DS1094LU-42M+?
For technical support, including DS1094LU-42M+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1094LU-42M+ requirements.
6.How does Aetrix verify that DS1094LU-42M+ is sourced from the original manufacturer or authorized distributors?
All DS1094LU-42M+ 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 DS1094LU-42M+ meets industry standards.
7.What is the process for return or replacement of DS1094LU-42M+?
All DS1094LU-42M+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1094LU-42M+, 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 DS1094LU-42M+ part is unused and in its original packaging.
Return procedure for DS1094LU-42M+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1094LU-42M+ Tags
-
CD74HCT4046AM96
Texas Instruments
-
MC14046BDWR2G
onsemi
-
501MILFT
Renesas
-
CD74HC7046AM
Texas Instruments
-
CDCVF2505PWR
Texas Instruments
-
RC19004A100GNL#KB0
Renesas
-
SI5351A-B-GTR
Skyworks Solutions Inc.
-
CY2305SXI-1T
Infineon Technologies
-
570BILFT
Renesas
-
CDCE913PWR
Texas Instruments
-
CY2305SXI-1HT
Infineon Technologies
-
DS1086LU+T
Analog Devices Inc./Maxim Integrated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
