Analog Devices Inc./Maxim Integrated DS1099U-WZ+

Overview

DS1099U-WZ+ from Maxim Integrated is a factory-programmed, low-power dual-output silicon oscillator generating independent square-wave outputs at 2Hz (OUT0) and 0.25Hz (OUT1) across 2.7V–5.5V supply. It features CMOS/TTL-compatible outputs capable of sinking 16mA, enabling direct LED drive without external drivers, and operates from –40°C to +125°C. Used in status indication and timing-critical embedded subsystems.

For engineers reviewing the DS1099U-WZ+ datasheet, DS1099U-WZ+ pinout, DS1099U-WZ+ application, or DS1099U-WZ+ equivalent, key selection considerations include factory-set divider ratios (X0=19, X1=22), output enable independence, ±100ppm/°C temp drift, and µSOP-8 package compatibility with space-constrained industrial control and power management designs.

Technical Context

The DS1099U-WZ+ integrates a fixed 1.048MHz master oscillator followed by two independent binary dividers-DIVIDER 0 (X0=19 → 2Hz) and DIVIDER 1 (X1=22 → 0.25Hz)-each mapped to dedicated output pins OUT0 and OUT1. Divider settings are permanently stored in on-chip EEPROM.

Output enables OE0 and OE1 operate active-low: pulling either high forces its corresponding output high-impedance off-state while leaving the master oscillator and divider logic fully powered. Outputs remain asynchronous and exhibit no phase relationship, with power-up time ≤10ms and rise/fall times ≤20ns (CL=15pF).

Key Specifications

Pinout & Package

DS1099U-WZ+ is housed in an 8-pin µSOP package (3.0mm × 3.0mm, 0.5mm pitch) with exposed pad grounded per Maxim's substrate connection specification. Pin 1 is OUT1; pins 7 and 8 are no-connect (N.C.).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-frequency dual-oscillator applications.

Compared with DS1099U-WZ+, DS1099U-XZ+ and DS1099U-VZ+ share identical electrical specs, package, and enable logic but differ only in factory-programmed divider values-making them drop-in replacements for frequency-adjusted timing needs without layout or firmware changes.

Availability

DS1099U-WZ+ is available at Aetrix Electronics and suitable for flashing LED status indicators, switch-mode power supplies, and consumer appliance timing applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DS1099U-WZ+ 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 solutions for industrial, automotive, and communications markets.

The DS1099U-WZ+ belongs to the EconOscillator™ family-engineered for cost-sensitive, low-frequency timing tasks where programmability, small size, and direct LED drive eliminate microcontroller dependency.

FAQ

What are the factory-programmed output frequencies of the DS1099U-WZ+?

The DS1099U-WZ+ is factory-programmed with OUT0 set to 2Hz and OUT1 set to 0.25Hz, derived from the fixed 1.048MHz master oscillator using binary dividers X0=19 and X1=22. These values are permanently stored in on-chip EEPROM and cannot be modified in-circuit. The DS1099U-WZ+ delivers these exact frequencies across its full operating temperature and supply voltage range.

Can both outputs of the DS1099U-WZ+ be disabled simultaneously?

Yes - pulling both OE0 and OE1 high disables both OUT0 and OUT1, forcing each output into a high-impedance state (not floating). The master oscillator and internal dividers remain fully powered and running, ensuring immediate output activation (<10ms) when either OE pin is pulled low. This behavior is confirmed in the DS1099U-WZ+ functional diagram and pin description.

Does the DS1099U-WZ+ require external capacitors or resistors for operation?

No - the DS1099U-WZ+ is a self-contained oscillator requiring no external timing components. Only standard power-supply decoupling (0.01µF and 0.1µF ceramic capacitors placed near VCC and GND) is recommended per Maxim's application guidance. No pull-up/down resistors, loading caps, or trimming elements are needed for basic operation of the DS1099U-WZ+.

What is the maximum output current capability of the DS1099U-WZ+ at +125°C?

At +125°C, the DS1099U-WZ+ outputs are specified to sink up to 12mA while maintaining VOL ≤ 0.4V (per DC Electrical Characteristics table). This reduced rating versus the 16mA spec at –40°C to +85°C reflects silicon performance limits at elevated temperature. Designers must verify load current against this derated value when operating the DS1099U-WZ+ at maximum ambient temperature.

Is the DS1099U-WZ+ RoHS-compliant and lead-free?

Yes - the "+" suffix in DS1099U-WZ+ indicates RoHS-compliant, lead-free packaging per Maxim Integrated's branding and ordering conventions. The device meets JEDEC J-STD-020A soldering specifications and is qualified for lead-free reflow processes. Full compliance documentation is available in Maxim's official package and environmental data sheets for the DS1099U-WZ+.