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Analog Devices Inc./Maxim Integrated DS1099U-FF+T
- Part No.:
- DS1099U-FF+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1099U-FF+T.pdf
- Description:
- IC CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,953
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Product details
Overview
DS1099U-FF+T from Maxim Integrated is a factory-programmed, low-power dual-output silicon oscillator generating independent square-wave outputs at frequencies from 0.25Hz to 1.048MHz. It operates from 2.7V to 5.5V, sinks up to 16mA per output for direct LED driving, and features independent OE0/OE1 enables. Used in flashing status indicators and switch-mode power supplies where microprocessor interrupt relief and stable low-frequency timing are required.
For engineers reviewing the DS1099U-FF+T datasheet, DS1099U-FF+T pinout, DS1099U-FF+T application, or DS1099U-FF+T equivalent, this page provides verified electrical parameters, package mapping to 8-pin µSOP, confirmed dual-divider architecture, output drive capability, temperature stability (±100ppm/°C), and real-world use cases in consumer appliances and industrial power systems.
Technical Context
The DS1099U-FF+T integrates a fixed 1.048MHz master oscillator with two independent, factory-programmed binary dividers (X0 and X1, each 0–22), enabling asynchronous, non-overlapping output frequencies on OUT0 and OUT1. Each output is CMOS/TTL-compatible and driven by a dedicated output stage capable of sinking 16mA at −40°C to +85°C or 12mA up to +125°C.
OE0 and OE1 independently disable their respective outputs by forcing them high without halting the master oscillator or dividers. The device requires no external timing components, supports wide supply voltage (2.7V–5.5V), and exhibits ±1.0% frequency tolerance at +25°C with 3300ppm/V voltage sensitivity and ±100ppm/°C temperature drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 0.25Hz to 1.048MHz per output - supports ultra-low-power blink intervals and mid-frequency control signals without external components |
| Supply Voltage | 2.7V to 5.5V - interoperable across 3V and 5V logic domains without level-shifting |
| Output Drive Strength | 16mA sink per output at −40°C to +85°C - directly drives LEDs or TTL/CMOS inputs without buffer stages |
| Frequency Tolerance | ±1.0% at +25°C - sufficient for non-critical timing such as status indication and power sequencing |
| Temp Drift | ±100ppm/°C max - predictable low-frequency variation over industrial temperature range (−40°C to +125°C) |
| Power-Up Time | 10ms max - ensures rapid system readiness after VCC stabilization |
| Standby Current | 145µA to 275µA - enables battery-backed or energy-sensitive applications |
Pinout & Package
DS1099U-FF+T is housed in an 8-pin µSOP (micro Small Outline Package) with exposed pad, RoHS-compliant, footprint compatible with JEDEC MO-187AA. Pin 1 is OUT1; pins 7 and 8 are no-connect (N.C.). VCC and GND are duplicated for improved decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Factory-programmed divider output; CMOS/TTL-compatible; sinks 16mA when enabled |
| 2 | OUT0 | Factory-programmed divider output; independent frequency from OUT1; same drive capability |
| 3 | VCC | Primary power supply input (2.7V–5.5V); duplicated on pin 6 for noise reduction |
| 4 | GND | Ground reference; substrate tied to GND per package topology |
| 5 | OE0 | Active-low enable for OUT0; high = forced high output; does not affect oscillator or divider operation |
| 6 | VCC | Secondary VCC connection; improves power integrity and reduces supply impedance |
| 7, 8 | N.C. | No internal connection; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent programmable outputs | Each output set to unique frequency via factory EEPROM (X0/X1 = 0–22), enabling simultaneous 1Hz blink + 1kHz control signal |
| Direct LED drive capability | 16mA sink per output eliminates need for discrete transistor drivers in status indicator circuits |
| Independent output enables | OE0/OE1 allow dynamic power gating of individual outputs without resetting oscillator or affecting other channel |
| No external timing components | Self-contained oscillator core removes crystal, capacitors, and layout sensitivity - simplifies BOM and board space |
| Industrial temperature support | Guaranteed operation from −40°C to +125°C with validated AC/DC specs across full range |
Applications
| Flashing LED Status Indicators | Switch-Mode Power Supplies |
|---|---|
Use Scenario: Visual status feedback in network routers, storage enclosures, and industrial HMIs requiring reliable, low-power blinking at user-defined intervals. IC Role / Device Role / Timing Role: Primary low-frequency clock source generating asynchronous blink patterns on multiple LEDs without CPU intervention. Use Value: Reduces firmware overhead by offloading periodic interrupt generation; 16mA drive eliminates external driver transistors. |
Use Scenario: Providing synchronized timing references for PWM controllers or auxiliary monitoring circuits in DC-DC converters. IC Role / Device Role / Timing Role: Stable, low-jitter clock generator for gate-drive timing or fault-detection sampling clocks. Use Value: ±100ppm/°C drift ensures consistent switching frequency across thermal cycles; dual outputs support primary + redundancy or interleaved phases. |
| Consumer Appliances | Servers |
Use Scenario: Power-on sequencing, mode indication, and standby timer functions in washing machines, microwaves, and smart home hubs. IC Role / Device Role / Timing Role: Low-cost, single-chip timing solution replacing RC networks and microcontroller-based timers. Use Value: Factory calibration eliminates field tuning; 2.7V–5.5V operation supports mixed-voltage appliance subsystems. |
Use Scenario: Chassis management controller (CMC) timing for fan speed control, health monitoring, and LED activity signaling in rack-mounted servers. IC Role / Device Role / Timing Role: Dedicated oscillator for non-critical but reliability-sensitive subsystem clocks independent of main system clock tree. Use Value: Standby current ≤275µA extends uptime during low-power states; −40°C to +125°C rating matches server thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-frequency dual-oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1086L-025+ | Single-output, 0.25Hz–131kHz range; lower max frequency; same µSOP-8 package and 16mA drive | Lacks independent dual outputs; suitable only when one timing channel suffices | Select if cost sensitivity outweighs need for dual asynchronous frequencies |
| MAX6381XR29D3+ | Supervisory circuit with watchdog timer and reset generator; includes 1.25kHz oscillator but no programmable dual outputs | Provides voltage monitoring and reset assertion - not a functional replacement for oscillator-only use | Choose only when system-level supervision (not just timing) is required alongside basic clocking |
Compared with DS1099U-FF+T, DS1086L-025+ offers identical drive strength and package but lacks second output and higher-frequency capability; MAX6381XR29D3+ adds supervision functionality at the expense of programmable dual-frequency flexibility and LED drive current.
Availability
DS1099U-FF+T is available at Aetrix Electronics and suitable for flashing LED status indicators, switch-mode power supplies, and consumer appliances requiring stable component supply, long-term lifecycle support, and guaranteed factory programming.
Supply support for DS1099U-FF+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 power management ICs for industrial, computing, and communications applications.
The DS1099U-FF+T belongs to the EconOscillator™ family-engineered for cost-sensitive, low-frequency timing tasks where simplicity, low power, and direct LED interfacing are prioritized over high accuracy or high frequency.
FAQ
What is the factory-programmed frequency configuration of DS1099U-FF+T?
The DS1099U-FF+T is factory-programmed with specific divider settings encoded in its part number suffix: "FF" indicates X0 = 21 (1Hz on OUT0) and X1 = 21 (1Hz on OUT1). This yields nominal output frequencies of 1Hz on both OUT0 and OUT1, derived from the fixed 1.048MHz master oscillator divided by 2²¹. No field reprogramming is possible.
Can DS1099U-FF+T drive standard LEDs directly without external components?
Yes, DS1099U-FF+T can drive standard LEDs directly: each output sinks up to 16mA at −40°C to +85°C and 12mA at −40°C to +125°C, meeting typical red/green/yellow LED forward current requirements. A current-limiting resistor is still required in series with the LED to set desired brightness and ensure safe operation within VOL and IOL limits.
How does the output enable logic work on DS1099U-FF+T?
On DS1099U-FF+T, OE0 and OE1 are active-low enables: pulling OE0 low enables OUT0; pulling it high forces OUT0 high (disabled). Same applies to OE1/OUT1. Disabling an output does not stop the master oscillator or its associated divider - only the output driver is gated. Both outputs may be disabled simultaneously while internal circuitry remains active.
Is DS1099U-FF+T suitable for automotive applications?
No, DS1099U-FF+T is not qualified for automotive use. Its datasheet specifies an operating temperature range of −40°C to +125°C but explicitly excludes automotive qualification; Revision History notes removal of automotive references. It is intended for industrial, computing, and consumer applications where AEC-Q200 compliance is not required.
What decoupling is recommended for DS1099U-FF+T?
Maxim recommends placing high-quality ceramic decoupling capacitors (0.01µF and 0.1µF) as close as possible to the VCC and GND pins of DS1099U-FF+T. Mounting must minimize lead inductance - surface-mount capacitors placed adjacent to pins 3 (VCC) and 4 (GND), and optionally near pin 6 (secondary VCC), ensures stable operation and reduced supply noise coupling into the oscillator core.
DS1099U-FF+T 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:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Generator
- PLL:
- No
- Input:
- Clock
- Output:
- CMOS, TTL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:2
- Differential - Input:Output:
- No/No
- Frequency - Max:
- 32.75kHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
DS1099U-FF+T FAQ
1.How can I place an order for DS1099U-FF+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1099U-FF+T 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 DS1099U-FF+T reliable?
The price and inventory of DS1099U-FF+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1099U-FF+T is usually 5 days.
3.What payment methods are accepted for DS1099U-FF+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1099U-FF+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1099U-FF+T?
DS1099U-FF+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1099U-FF+T 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 DS1099U-FF+T?
For technical support, including DS1099U-FF+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1099U-FF+T requirements.
6.How does Aetrix verify that DS1099U-FF+T is sourced from the original manufacturer or authorized distributors?
All DS1099U-FF+T 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 DS1099U-FF+T meets industry standards.
7.What is the process for return or replacement of DS1099U-FF+T?
All DS1099U-FF+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1099U-FF+T, 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 DS1099U-FF+T part is unused and in its original packaging.
Return procedure for DS1099U-FF+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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