Analog Devices Inc./Maxim Integrated DS1099U-FA/V+T

Overview

DS1099U-FA/V+T from Maxim Integrated is a factory-programmed dual-output silicon oscillator generating independent square-wave outputs at frequencies from 0.25Hz to 1.048MHz, operating from 2.7V to 5.5V, sinking up to 16mA per output for direct LED drive, and rated for -40°C to +125°C industrial temperature range.

For engineers reviewing the DS1099U-FA/V+T datasheet, DS1099U-FA/V+T pinout, DS1099U-FA/V+T application, or DS1099U-FA/V+T equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed dual-divider architecture, real-world LED-driving capability, and precise factory-set frequency configurations for embedded timing control in power-constrained systems.

Technical Context

The DS1099U-FA/V+T integrates a fixed 1.048MHz master oscillator with two independent, factory-programmed binary dividers (X0 and X1), enabling asynchronous, non-overlapping output frequencies. Each output (OUT0/OUT1) is controlled by dedicated enable pins (OE0/OE1) that force high when inactive - without halting internal oscillation or division logic.

Its CMOS/TTL-compatible outputs deliver guaranteed 16mA sink capability at -40°C to +85°C (12mA up to +125°C), and exhibit ±100ppm/°C max temperature drift and ±1% frequency tolerance at +25°C. Power-up time is ≤10ms, and supply current ranges from 145µA (standby) to 323µA (1.048MHz active, VCC = 3.3V).

Key Specifications

Pinout & Package

DS1099U-FA/V+T is housed in an 8-pin µSOP package (2.0mm × 2.5mm, 0.5mm pitch), RoHS-compliant, with exposed pad thermally connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1099U-MA/V+T and DS1099U-RA/V+T, the DS1099U-FA/V+T provides unique 1Hz/0.5Hz dual outputs - enabling asymmetric status signaling (e.g., heartbeat + fault pulse) without external logic or software intervention.

Availability

DS1099U-FA/V+T is available at Aetrix Electronics and suitable for flashing LED status indicators, switch-mode power supplies, and consumer appliances requiring stable component supply across extended temperature and voltage ranges.

Supply support for DS1099U-FA/V+T 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 industrial, automotive, and communications applications.

The DS1099U-FA/V+T belongs to the EconOscillator™ family - engineered specifically for low-cost, low-power, factory-configured timing in space- and energy-constrained embedded systems.

FAQ

What is the factory-programmed frequency configuration of DS1099U-FA/V+T?

The DS1099U-FA/V+T is factory-programmed with divider settings X0 = 21 and X1 = 22, producing nominal output frequencies of 1Hz on OUT0 and 0.5Hz on OUT1. These values are permanently stored in on-chip EEPROM and cannot be reprogrammed in the field. The "FA" suffix explicitly denotes this configuration per Maxim's ordering nomenclature.

Can DS1099U-FA/V+T drive LEDs directly without external components?

Yes, DS1099U-FA/V+T can drive standard LEDs directly: each output (OUT0 and OUT1) sinks up to 16mA at -40°C to +85°C and 12mA up to +125°C, meeting typical LED forward-current requirements. No series resistors or buffer transistors are needed when VCC is within 2.7V–5.5V and LED forward voltage is compatible with the device's VOL specification (≤0.4V at rated sink current).

What happens to the internal oscillator when OE0 and OE1 are both high?

When both OE0 and OE1 are high, DS1099U-FA/V+T forces OUT0 and OUT1 high but continues running the 1.048MHz master oscillator and both binary dividers. The internal timing circuitry remains fully active - enabling instantaneous output activation (<10ms power-up time retained) upon OE pin transition to low, with no re-synchronization delay.

Is DS1099U-FA/V+T suitable for automotive applications?

No, DS1099U-FA/V+T is not qualified for automotive use. Its datasheet specifies an operating temperature range of -40°C to +125°C but omits AEC-Q200 qualification, automotive-specific reliability testing, or PPAP documentation. It is intended for industrial, computing, and consumer applications - not under-hood or safety-critical vehicle systems.

How does supply voltage variation affect output frequency stability in DS1099U-FA/V+T?

DS1099U-FA/V+T exhibits ±2.5% frequency variation over its full 2.7V–5.5V supply range at +25°C, and 3300ppm/V sensitivity near nominal VCC. This voltage-induced drift is inherent to its silicon oscillator architecture and must be accounted for in applications requiring tight frequency accuracy - such as precision timing references - where external regulation or calibration may be necessary.