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Analog Devices Inc./Maxim Integrated MAX31091AUA/V+400
- Part No.:
- MAX31091AUA/V+400
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX31091AUA/V+400.pdf
- Description:
- IC CLK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX31091AUA/V+400 from Maxim Integrated is an AEC-Q100-qualified spread-spectrum EconOscillator™ delivering a factory-programmed 400kHz center-dithered clock output with ±0.25% nominal accuracy at +25°C, ±1.75% across -40°C to +125°C, operating from 3.0V to 3.6V in an 8-pin µMAX® package. It serves as a low-emission timing source for automotive ECU instrumentation and ADAS sensor interfaces.
For engineers reviewing the MAX31091AUA/V+400 datasheet, MAX31091AUA/V+400 pinout, MAX31091AUA/V+400 application, or MAX31091AUA/V+400 equivalent, key selection criteria include dither magnitude selectability (0%/±1%/±2%/±4%), pin-configurable dither rate, automotive-grade thermal stability, and RoHS-compliant µMAX packaging.
Technical Context
The MAX31091AUA/V+400 implements a factory-trimmed master oscillator with integrated triangle-wave generator to inject center-spread modulation. Dither magnitude is set via SEL0/SEL1 logic states, and dither rate is selected by DR pin state per Table 2 - for fOUT = 400kHz, n = 4 yields dither rates of 198Hz (DR = 1) or 158Hz (DR = 0).
Its architecture ensures deterministic power-up behavior: OUT remains low for ≥0.1ms after VCC stabilization, eliminating glitch risk during system boot. All I/O pins tolerate voltages up to VCC + 0.5V (max 4.0V), and the device draws 7.5mA typical supply current at 400kHz, 3.3V, +25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | Factory-set 400kHz center-spread spectrum output; enables EMI reduction in low-frequency automotive control loops. |
| Frequency Accuracy | ±0.25% at +25°C, ±1.75% over -40°C to +125°C; ensures stable timing for engine control sampling without calibration. |
| Supply Voltage | 3.0V to 3.6V; compatible with automotive 3.3V rail systems and tolerant of battery transients. |
| Dither Magnitude | PIN-selectable 0%, ±1%, ±2%, or ±4%; allows tuning of spectral spreading depth to meet specific EMC limits. |
| Operating Temperature | -40°C to +125°C; qualified per AEC-Q100 Grade 0 for under-hood and instrument cluster deployment. |
| Package | 8-pin µMAX® (U8+4); 3mm × 3mm footprint with exposed pad for thermal management in compact modules. |
| Jitter (RMS) | 0.3% at 50MHz reference; indicates low phase noise suitable for synchronous digital subsystems. |
Pinout & Package
MAX31091AUA/V+400 is housed in an 8-pin µMAX® package (outline 21-0036, land pattern 90-0092), RoHS-compliant with "+" suffix, featuring an exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Spread-spectrum clock output | CMOS-compatible square wave with programmable dither; drives clock inputs of MCUs, ADCs, or CAN controllers. |
| 2 - VCC | Power supply input | 3.0V–3.6V supply pin; requires local 0.01µF + 0.1µF ceramic decoupling per layout guidelines. |
| 3 - GND | Ground reference | Primary return path; connects to exposed thermal pad for thermal and EMI performance. |
| 4 - SEL1 | Dither magnitude select | Logic input defining dither % with SEL0; sets ±1%/±2%/±4% or 0% per Table 1. |
| 5 - SEL0 | Dither magnitude select | Complementary input to SEL1; both pins determine dither amplitude configuration. |
| 6,7 - N.C. | No connection | Internally unconnected; must remain floating or tied to GND per design rules - no external biasing. |
| 8 - DR | Dither rate select | Logic input selecting high/low dither frequency; for 400kHz output, selects ~198Hz or ~158Hz modulation. |
Key Features
| Feature | Design Value |
|---|---|
| Center-spread spectrum generation | Reduces peak radiated emissions by up to 14dB at fundamental and harmonics - critical for automotive EMC compliance. |
| Pin-selectable dither parameters | Eliminates need for external configuration EEPROM or firmware control; supports hardware-only EMI tuning. |
| AEC-Q100 Grade 0 qualification | Validated for operation at +125°C ambient - suitable for engine bay, transmission control, and ADAS radar modules. |
| Factory-programmed frequency | 400kHz output is laser-trimmed at wafer test; eliminates post-solder calibration and reduces BOM count. |
| Low-power active mode | 7.5mA typical ICC at 400kHz enables use in always-on vehicle subsystems without excessive thermal load. |
Applications
| Engine Control Unit (ECU) Instrumentation | ADAS Camera Sensor Interface |
|---|---|
Use Scenario: Timing synchronization for analog front-end sampling and CAN message framing in dashboard cluster ECUs. IC Role / Device Role / Timing Role: Primary spread-spectrum clock source for microcontroller peripherals and ADC sampling clocks. Use Value: 400kHz dithered output suppresses narrowband EMI peaks near 400kHz harmonics, easing CISPR 25 Class 5 compliance. |
Use Scenario: Clocking image sensor serializers and MIPI CSI-2 bridge ICs in surround-view camera modules. IC Role / Device Role / Timing Role: Low-jitter, spread-spectrum reference clock for pixel clock generation and data alignment. Use Value: Center-dithered 400kHz enables deterministic jitter shaping while maintaining timing margin for serializer lock acquisition. |
| Automotive Infotainment Audio DSP | Body Control Module (BCM) LIN Bus Timing |
Use Scenario: Providing master clock to audio codec and DSP in head-unit systems with strict EMI limits. IC Role / Device Role / Timing Role: System-level clock generator with configurable dither to reduce audible beat frequencies and RF interference. Use Value: ±1% dither magnitude option balances EMI suppression and audio PLL stability for low-noise DAC operation. |
Use Scenario: Synchronizing LIN transceivers and microcontroller UART peripherals in door module and lighting controllers. IC Role / Device Role / Timing Role: Robust, temperature-stable clock source for LIN physical layer timing (19.2kbps nominal baud). Use Value: ±1.75% accuracy over full automotive range ensures reliable LIN frame timing without software compensation. |
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 | Programmable I²C-based clock generator; supports multiple outputs and fractional synthesis; not AEC-Q100 qualified. | Requires MCU host and firmware; suited for infotainment SoC clock trees, not standalone ECU timing. | Select when multi-frequency flexibility and I²C reconfiguration outweigh automotive qualification needs. |
| ICS8430I-41LF | Fixed-frequency LVDS oscillator; 400kHz output available but no spread-spectrum capability; AEC-Q100 Grade 2 only. | Lacks dither control; limited to ambient ≤105°C; used where EMI is managed externally. | Select only if system-level filtering replaces on-chip spectral spreading and temperature range permits. |
Compared with Si5351A-B-GM and ICS8430I-41LF, the MAX31091AUA/V+400 delivers automotive-grade spread-spectrum functionality in a pin-configurable, zero-firmware solution - making it optimal for cost-sensitive, safety-critical ECU timing where EMI reduction must be hardware-guaranteed.
Availability
MAX31091AUA/V+400 is available at Aetrix Electronics and suitable for automotive ECU instrumentation, ADAS sensor modules, and body control units requiring stable component supply with AEC-Q100 traceability and long-term lifecycle support.
Supply support for MAX31091AUA/V+400 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 power management ICs for automotive, industrial, and communications markets.
The MAX31091 series belongs to Maxim's EconOscillator™ family - engineered specifically for automotive-grade, low-EMI clock generation with factory-programmed frequencies and hardware-selectable spread-spectrum parameters.
FAQ
What is the factory-programmed output frequency of the MAX31091AUA/V+400?
The MAX31091AUA/V+400 is factory-programmed to deliver a precise 400kHz center-spread-spectrum clock output. This frequency is laser-trimmed during production and cannot be altered in-circuit. The device maintains ±0.25% accuracy at +25°C and ±1.75% across its full -40°C to +125°C operating range, ensuring consistent timing for automotive control applications without field calibration.
Does the MAX31091AUA/V+400 require external configuration or firmware to operate?
No, the MAX31091AUA/V+400 operates autonomously with no external configuration required. Its 400kHz output frequency is factory-set, and dither parameters (magnitude and rate) are selected solely via hard-wired logic levels on SEL0, SEL1, and DR pins. This eliminates dependency on MCU firmware, I²C buses, or nonvolatile memory - making MAX31091AUA/V+400 ideal for safety-critical, single-function timing roles in automotive ECUs.
Is the MAX31091AUA/V+400 AEC-Q100 qualified, and what grade does it meet?
Yes, the MAX31091AUA/V+400 is AEC-Q100 qualified to Grade 0, certified for continuous operation from -40°C to +125°C ambient temperature. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and electrical reliability - confirming suitability for under-hood, transmission, and ADAS applications where extended thermal endurance is mandatory.
What are the valid logic voltage levels for SEL0, SEL1, and DR pins on the MAX31091AUA/V+400?
For the MAX31091AUA/V+400, SEL0, SEL1, and DR accept logic inputs referenced to VCC: VIH ≥ 0.7 × VCC (min 2.1V at VCC = 3.0V) and VIL ≤ 0.3 × VCC (max 1.08V at VCC = 3.6V). Input voltage must not exceed VCC + 0.5V (absolute max 4.0V). These thresholds ensure robust noise immunity in automotive harness environments where ground offsets and transients occur.
How does the MAX31091AUA/V+400 manage power-up behavior to prevent glitches?
The MAX31091AUA/V+400 holds its OUT pin low for ≥0.1ms after VCC reaches valid operating voltage, ensuring clean power-up sequencing. This internal power-on reset prevents spurious clock edges that could corrupt MCU boot states or cause false triggers in downstream logic. The delay is guaranteed across -40°C to +125°C and independent of dither configuration - a key reliability feature for automotive restart scenarios.
MAX31091AUA/V+400 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:
- -
- 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:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-uMAX/uSOP
MAX31091AUA/V+400 FAQ
1.How can I place an order for MAX31091AUA/V+400 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX31091AUA/V+400 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 MAX31091AUA/V+400 reliable?
The price and inventory of MAX31091AUA/V+400 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX31091AUA/V+400 is usually 5 days.
3.What payment methods are accepted for MAX31091AUA/V+400?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX31091AUA/V+400 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX31091AUA/V+400?
MAX31091AUA/V+400 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX31091AUA/V+400 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 MAX31091AUA/V+400?
For technical support, including MAX31091AUA/V+400 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX31091AUA/V+400 requirements.
6.How does Aetrix verify that MAX31091AUA/V+400 is sourced from the original manufacturer or authorized distributors?
All MAX31091AUA/V+400 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 MAX31091AUA/V+400 meets industry standards.
7.What is the process for return or replacement of MAX31091AUA/V+400?
All MAX31091AUA/V+400 units undergo pre-shipment inspection (PSI). If there is an issue with MAX31091AUA/V+400, 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 MAX31091AUA/V+400 part is unused and in its original packaging.
Return procedure for MAX31091AUA/V+400:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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