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Analog Devices Inc./Maxim Integrated DS1099U-CD+T
- Part No.:
- DS1099U-CD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1099U-CD+T.pdf
- Description:
- IC CLOCK GENERATOR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,165
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Product details
Overview
DS1099U-CD+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. It operates from 2.7V to 5.5V, sinks up to 16mA per output for direct LED driving, and features independent OE0/OE1 enables. It is used in flashing LED status indicators and switch-mode power supply timing control.
For engineers reviewing the DS1099U-CD+T datasheet, DS1099U-CD+T pinout, DS1099U-CD+T application, or DS1099U-CD+T equivalent, key selection criteria include factory-set divider values (X0=20, X1=22), ±100ppm/°C temp drift, 8-pin µSOP package, -40°C to +125°C operation, and CMOS/TTL-compatible 16mA-sink outputs.
Technical Context
The DS1099U-CD+T integrates a fixed 1.048MHz master oscillator with two independent binary dividers (X0=20, X1=22), yielding nominal output frequencies of 1Hz (OUT0) and 0.25Hz (OUT1). Divider settings are stored in factory-programmed EEPROM and cannot be modified in-circuit.
Each output is controlled by a dedicated enable pin (OE0/OE1): low = enabled (active-low logic), high = disabled (output forced high). The master oscillator and dividers remain active regardless of OE state, ensuring fast output re-enable without startup delay beyond tPU ≤10ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequencies | OUT0 = 1Hz, OUT1 = 0.25Hz - factory-programmed, no external components required |
| Supply Voltage Range | 2.7V to 5.5V - supports both 3V and 5V systems without level-shifting |
| Output Drive Capability | 16mA sink per output at -40°C to +85°C - directly drives LEDs or logic inputs without external buffers |
| Frequency Stability | ±100ppm/°C max temp drift - ensures predictable timing across industrial temperature range |
| Power-Up Time | ≤10ms - enables rapid system initialization after power-on or reset |
| Operating Temperature | -40°C to +125°C - qualified for harsh industrial and server environments |
| Standby Current | 145–275µA (OE0=OE1=VCC) - ultra-low quiescent power for battery-backed or energy-sensitive designs |
Pinout & Package
DS1099U-CD+T is housed in an 8-pin µSOP package (2.0mm × 2.5mm, 0.5mm pitch), RoHS-compliant, with exposed substrate connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Oscillator output 1 - factory set to 0.25Hz; high-impedance when OE1 = high |
| 2 | OUT0 | Oscillator output 0 - factory set to 1Hz; high-impedance when OE0 = high |
| 3 | VCC | Positive supply input - accepts 2.7V–5.5V; requires local 0.01µF + 0.1µF ceramic decoupling |
| 4 | GND | Ground reference - substrate tied to GND; critical for thermal and noise performance |
| 5 | OE0 | Output enable for OUT0 - active-low; OE0 = low enables OUT0, OE0 = high forces OUT0 high |
| 6 | OE1 | Output enable for OUT1 - active-low; OE1 = low enables OUT1, OE1 = high forces OUT1 high |
| 7, 8 | N.C. | No connection - must remain unconnected; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent frequency outputs | OUT0 = 1Hz, OUT1 = 0.25Hz - eliminates need for external dividers or microcontroller interrupts in periodic signaling |
| Factory-programmed EEPROM dividers | X0 = 20, X1 = 22 - removes configuration overhead and ensures deterministic behavior at power-up |
| 16mA output sink capability | Drives LEDs directly - avoids discrete transistor stages and reduces BOM count in indicator circuits |
| Independent active-low output enables | OE0/OE1 control each output separately - enables dynamic power gating and multi-mode timing without MCU involvement |
| Wide supply and temperature range | 2.7V–5.5V / -40°C to +125°C - supports deployment in servers, printers, and industrial SMPS without derating |
Applications
| Flashing LED Status Indicators | Switch-Mode Power Supplies |
|---|---|
Use Scenario: Visual status indication on server front panels or appliance control boards requiring precise, low-frequency blinking (e.g., heartbeat or fault alerts). IC Role / Device Role / Timing Role: Primary timing source generating asynchronous 1Hz and 0.25Hz square waves to drive LEDs via direct sink connection. Use Value: Eliminates microcontroller GPIO toggling and associated firmware overhead while guaranteeing jitter-free, stable blink intervals across voltage and temperature. |
Use Scenario: Synchronization of auxiliary monitoring circuits or fan control logic in isolated DC-DC converters where precise low-frequency timing is needed. IC Role / Device Role / Timing Role: Standalone clock generator providing deterministic timing references for non-critical control loops independent of main PWM controller. Use Value: Reduces dependency on complex timing ICs or software-based delays; enables reliable timing even during MCU reset or brownout conditions. |
| Consumer Appliances | Printers |
Use Scenario: Power-on self-test sequencing or mode-indication timing in washing machines, microwaves, or HVAC controllers. IC Role / Device Role / Timing Role: Dual-output oscillator delivering distinct timing signals (e.g., 1Hz for UI refresh, 0.25Hz for safety timeout monitoring). Use Value: Provides hardware-level timing assurance for safety-critical timeouts without consuming MCU resources or risking firmware lockup. |
Use Scenario: Paper jam detection interval timing or carriage position calibration pulses in inkjet or laser printer subsystems. IC Role / Device Role / Timing Role: Low-power, factory-calibrated timing source for mechanical subsystem coordination outside main print engine controller. Use Value: Ensures consistent inter-pulse timing across varying line voltages and ambient temperatures, improving mechanical reliability. |
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 |
|---|---|---|---|
| DS1099U-AC+T | Factory-programmed for OUT0 = 1.048MHz, OUT1 = 0.25Hz - higher-frequency primary output | Better suited for mixed-speed applications needing one fast clock (e.g., UART baud rate) and one slow indicator | Select when system requires one high-speed timing signal alongside low-frequency control, not dual slow outputs. |
| DS1099U-BC+T | Factory-programmed for OUT0 = 0.524MHz, OUT1 = 0.25Hz - intermediate primary frequency | Offers faster response than DS1099U-CD+T for event-driven wake-up or sampling, while retaining same slow indicator | Choose when balancing responsiveness and power savings in battery-operated peripherals or sensor nodes. |
Compared with DS1099U-CD+T, DS1099U-AC+T provides a 1MHz-class output ideal for digital interface timing, while DS1099U-BC+T delivers 524kHz-better for moderate-speed polling without increasing supply current significantly.
Availability
DS1099U-CD+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 ranges and long production lifecycles.
Supply support for DS1099U-CD+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 and mixed-signal ICs for industrial, computing, and communications applications, emphasizing reliability, integration, and low-power operation.
The DS1099U-CD+T belongs to the EconOscillator™ family-engineered specifically for cost-sensitive, low-frequency timing tasks where programmability, small size, and zero external components are essential.
FAQ
What is the factory-programmed output frequency of DS1099U-CD+T?
The DS1099U-CD+T is factory-programmed with OUT0 = 1Hz (X0 = 20) and OUT1 = 0.25Hz (X1 = 22), derived from the internal 1.048MHz master oscillator using binary division. These frequencies are permanently stored in on-chip EEPROM and cannot be altered in the field. DS1099U-CD+T delivers these exact outputs immediately upon power-up with no configuration required.
Can DS1099U-CD+T drive LEDs directly without external components?
Yes, DS1099U-CD+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 LED forward current requirements. No series resistors or transistors are needed when VCC ≥ 3.3V and LED VF ≤ 2.0V. DS1099U-CD+T's CMOS/TTL-compatible outputs simplify interface design in indicator circuits.
What is the function of pins OE0 and OE1 on DS1099U-CD+T?
Pins OE0 and OE1 are active-low output enables for OUT0 and OUT1 respectively. When pulled low, the corresponding output is enabled and actively drives its programmed square wave. When pulled high, that output is disabled and forced high-impedance (not tri-stated-output is driven high). DS1099U-CD+T's OE pins allow independent, hardware-controlled gating of each output without affecting the master oscillator or other channel.
Does DS1099U-CD+T require external capacitors or resistors to operate?
No, DS1099U-CD+T requires no external timing components: all frequency generation is handled internally via factory-programmed dividers and a fixed 1.048MHz oscillator. Only standard power-supply decoupling (0.01µF + 0.1µF ceramic capacitors near VCC/GND) is recommended. DS1099U-CD+T operates fully autonomously once powered and enabled.
What is the operating temperature range and supply voltage specification for DS1099U-CD+T?
DS1099U-CD+T operates over -40°C to +125°C and accepts a single supply voltage from 2.7V to 5.5V. Its ±100ppm/°C maximum frequency drift and guaranteed 16mA sink capability across this full range make it suitable for industrial servers, printers, and automotive-adjacent equipment. DS1099U-CD+T maintains specified performance without derating under these conditions.
DS1099U-CD+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:
- 262kHz, 131kHz
- 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-CD+T FAQ
1.How can I place an order for DS1099U-CD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1099U-CD+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-CD+T reliable?
The price and inventory of DS1099U-CD+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-CD+T is usually 5 days.
3.What payment methods are accepted for DS1099U-CD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1099U-CD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1099U-CD+T?
DS1099U-CD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1099U-CD+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-CD+T?
For technical support, including DS1099U-CD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1099U-CD+T requirements.
6.How does Aetrix verify that DS1099U-CD+T is sourced from the original manufacturer or authorized distributors?
All DS1099U-CD+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-CD+T meets industry standards.
7.What is the process for return or replacement of DS1099U-CD+T?
All DS1099U-CD+T units undergo pre-shipment inspection (PSI). If there is an issue with DS1099U-CD+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-CD+T part is unused and in its original packaging.
Return procedure for DS1099U-CD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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