Analog Devices Inc./Maxim Integrated MAX31091AUA/V+033

Overview

MAX31091AUA/V+033 from Maxim Integrated is an AEC-Q100-qualified automotive spread-spectrum clock oscillator factory-programmed to 33.3MHz, delivering ±0.25% center-frequency accuracy at +25°C and ±1.75% across -40°C to +125°C, with pin-selectable center-dither magnitudes (0%, ±1%, ±2%, ±4%) and dither rate control, used in ECU instrumentation and ADAS timing subsystems.

For engineers reviewing the MAX31091AUA/V+033 datasheet, MAX31091AUA/V+033 pinout, MAX31091AUA/V+033 application, or MAX31091AUA/V+033 equivalent, key selection criteria include its 33.3MHz center frequency, center-spread-spectrum capability, μMAX-8 package compatibility, automotive temperature range support, and dither configuration via SEL0/SEL1/DR pins.

Technical Context

The MAX31091AUA/V+033 implements a factory-programmed master oscillator with integrated triangle-wave generator for center-spread modulation. Its dither magnitude is set by dual logic inputs (SEL0/SEL1), and dither rate is controlled by DR pin state relative to output frequency bands defined in Table 2.

It operates exclusively from a 3.0V–3.6V supply, holds OUT low during power-up for tPU ≥ 0.1ms, and delivers rail-to-rail CMOS-compatible output (VOH ≥ 2.4V @ IOH = –4mA, VOL ≤ 0.4V @ IOL = 4mA) into 15pF–50pF loads with 40–60% duty cycle depending on fOUT.

Key Specifications

Pinout & Package

MAX31091AUA/V+033 is housed in an 8-pin μMAX package (outline 21-0036, land pattern 90-0092), measuring 3mm × 3mm × 0.8mm, with exposed pad thermally connected to GND. Pin 1 is OUT; pins 6 and 7 are no-connect; VCC and GND are duplicated for supply integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar spread-spectrum oscillator applications.

Compared with Si5351A-B-GM and ICS8430I-01T, the MAX31091AUA/V+033 uniquely combines AEC-Q100 qualification, hardware-configurable center-spread spectrum, and 3.3V CMOS output in a 3mm × 3mm package-making it the only drop-in solution for ECU and ADAS timing requiring zero firmware overhead and guaranteed EMI suppression.

Availability

MAX31091AUA/V+033 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor fusion, and ECU instrumentation requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant timing performance.

Supply support for MAX31091AUA/V+033 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 automotive, industrial, and communications markets.

The MAX31091AUA/V+033 belongs to Maxim's EconOscillator™ family-engineered specifically for automotive-grade spread-spectrum clock generation with factory-programmed frequencies and hardware-selectable EMI reduction.

FAQ

What is the factory-programmed output frequency of the MAX31091AUA/V+033?

The MAX31091AUA/V+033 is factory-programmed to a center frequency of 33.3MHz. This value is laser-trimmed during manufacturing and cannot be altered in-circuit. The device supports center-spread-spectrum modulation around this fixed frequency using SEL0, SEL1, and DR pins-enabling EMI reduction without changing the nominal timing reference.

Is the MAX31091AUA/V+033 AEC-Q100 qualified, and what grade does it meet?

Yes, the MAX31091AUA/V+033 is AEC-Q100 qualified per Grade 0, covering the full automotive temperature range of -40°C to +125°C. This qualification includes stress testing for thermal cycling, humidity, and lifetime reliability-ensuring suitability for under-hood and safety-critical timing applications such as ADAS and ECU instrumentation.

How is spread-spectrum dither configured on the MAX31091AUA/V+033?

Dither magnitude (0%, ±1%, ±2%, or ±4%) is selected using the logic states of SEL0 and SEL1 pins per Table 1 in the datasheet; dither rate is set by the DR pin state, which selects a divisor based on output frequency bands (Table 2). No software or serial interface is required-configuration is purely hardware-driven at power-up.

What are the supply voltage requirements for the MAX31091AUA/V+033?

The MAX31091AUA/V+033 requires a regulated 3.0V to 3.6V supply on VCC pins (2 and 4). Operation outside this range may cause malfunction or permanent damage. Absolute maximum rating is +4.0V; decoupling with 0.01µF and 0.1µF ceramic capacitors placed near VCC/GND pins is mandatory for stable operation and low-noise output.

Does the MAX31091AUA/V+033 support multiple output formats like LVDS or HCSL?

No, the MAX31091AUA/V+033 provides a single CMOS-compatible square-wave output on pin 1 (OUT). It delivers rail-to-rail logic levels (VOH ≥ 2.4V, VOL ≤ 0.4V) into 15pF–50pF loads. It does not support LVDS, HCSL, or differential output formats-those require separate clock buffer or translator ICs in the signal chain.