Analog Devices Inc./Maxim Integrated DS1091LUB-027/V+

Overview

DS1091LUB-027/V+ from Maxim Integrated is a factory-programmed, automotive-grade spread-spectrum oscillator delivering a down-dithered 27.0MHz clock output with ±0.25% nominal accuracy at +25°C, ±1.75% across -40°C to +125°C, and 3.0V–3.6V supply operation in an 8-pin µMAX® package. It reduces EMI in infotainment systems and industrial displays via pin-selectable dither magnitude (-2%, -4%, or -8%) and rate.

For engineers reviewing the DS1091LUB-027/V+ datasheet, DS1091LUB-027/V+ pinout, DS1091LUB-027/V+ application, or DS1091LUB-027/V+ equivalent, key selection criteria include its down-spread dither profile, automotive temperature compliance, pin-configurable dither rate (e.g., 13.2kHz at 27MHz/DR=1), and RoHS-compliant lead-free packaging for high-reliability embedded timing.

Technical Context

The DS1091LUB-027/V+ implements a triangle-wave modulated master oscillator architecture to generate down-dithered spread-spectrum output, where frequency deviation is strictly negative relative to the programmed 27.0MHz center frequency. Dither magnitude is selected via SEL0/SEL1 logic states, and dither rate is determined by DR pin state and output frequency per the equation f_DITHER = f_OUT/n, with n = 11 for 27.0MHz.

It features internal factory trimming for initial accuracy, no external components required, and power-up hold-low behavior (t_PU ≤ 0.1ms) to prevent glitching. All I/O pins tolerate voltages up to V_CC + 0.3V, and the device draws 16mA typical supply current at 3.6V, 66.6MHz (no dither), scaling with frequency and voltage.

Key Specifications

Pinout & Package

DS1091LUB-027/V+ is housed in an 8-pin µMAX® package (outline 21-0036, land pattern 90-0092), RoHS-compliant and lead(Pb)-free (+ suffix), with exposed pad not connected internally.

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-27T, DS1091LUB-027/V+ delivers deterministic down-spread EMI suppression without firmware, external crystals, or layout compromises - making it optimal for cost-sensitive, high-volume automotive and industrial timing where 27.0MHz is fixed and regulatory compliance is non-negotiable.

Availability

DS1091LUB-027/V+ is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMI panels, and POS terminal baseboards requiring stable component supply with AEC-Q100 qualification and RoHS compliance.

Supply support for DS1091LUB-027/V+ 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 applications, emphasizing high reliability and regulatory compliance.

The DS1091LUB-027/V+ belongs to the EconOscillator™ family - engineered specifically for EMI reduction in cost-sensitive, high-volume embedded systems using simple pin-strapped configuration instead of programmable interfaces.

FAQ

What is the exact output frequency and dither type of DS1091LUB-027/V+?

The DS1091LUB-027/V+ is factory-programmed to a precise 27.0MHz center frequency and provides down-spread spectrum only - meaning its output sweeps downward from 27.0MHz by selectable amounts (0%, -2%, -4%, or -8%). Unlike center-dither variants (e.g., DS1091LUA), DS1091LUB-027/V+ does not support symmetric dithering. This down-dither profile is optimized for suppressing harmonics in digital video and display interfaces.

Does DS1091LUB-027/V+ require an external crystal or configuration circuitry?

No, DS1091LUB-027/V+ is a fully self-contained oscillator with an integrated factory-trimmed resonator - no external crystal, capacitors, or programming interface is needed. Configuration is purely pin-strapped via SEL0, SEL1, and DR inputs. This eliminates BOM items, layout sensitivity, and firmware dependencies, making DS1091LUB-027/V+ ideal for high-reliability, low-complexity timing applications.

What is the supply voltage range and power consumption of DS1091LUB-027/V+?

DS1091LUB-027/V+ operates from 3.0V to 3.6V DC and draws 16mA typical supply current (ICC) under nominal conditions (VCC = 3.6V, TA = +25°C, no dither). Current scales with output frequency and supply voltage - e.g., at 27MHz and 3.3V, ICC is ~13mA. The device includes built-in power-up hold-low behavior (tPU ≤ 0.1ms) to prevent spurious clock edges during rail stabilization.

How is the dither rate determined for DS1091LUB-027/V+ at 27.0MHz?

For DS1091LUB-027/V+, the dither rate is calculated as f_DITHER = f_OUT/n, where n = 11 for output frequencies between 16.668MHz and 33.333MHz. At 27.0MHz, this yields 2.45kHz (DR = 0) or 4.91kHz (DR = 1). These rates are fixed per frequency band and pin state - no external timing components or registers are involved. The dither waveform is a triangle wave injected into the master oscillator control path.

Is DS1091LUB-027/V+ qualified for automotive applications, and what does the "/V+" suffix indicate?

Yes, DS1091LUB-027/V+ is AEC-Q100 qualified for automotive use. The "/V" suffix denotes automotive temperature grade (-40°C to +125°C), and the "+" indicates RoHS-compliant, lead(Pb)-free packaging. The device undergoes stress testing including HTOL, TC, and ESD per AEC-Q100 Rev G, and all electrical parameters are guaranteed across the full automotive temperature and voltage range - not just characterized.