Low-Frequency Dual EconOscillator

Industry's Tightest Tolerance, All-Silicon, Dual Clock Oscillator

Please check latest availability status for a specific part variant.


The DS1099 is a low-cost, low-power, low-frequency silicon oscillator that generates two square-wave outputs with frequencies between 0.25Hz and 1.048MHz. Individual output enables allow both outputs to be enabled/disabled independently. Both outputs are capable of sinking 16mA, allowing them to directly interface to light-emitting diodes (LEDs) as well as other external circuitry. The DS1099 operates over a wide supply voltage, making it suitable for both 3V and 5V systems. The device is shipped from the factory custom programmed and calibrated, ready to be inserted into the end application.

Contact the factory for custom frequencies or requirements.
DS1099: Typical Operating Circuit DS1099: Typical Operating Circuit Enlarge+

Key Features

  • Low-Cost, Low-Frequency EconOscillator™ with Dual Outputs
  • Factory Programmed
  • Output Frequencies Independently Programmable from 0.25Hz to 1.048MHz
  • 2.7V to 5.5V Single-Supply Operation
  • No External Timing Components Required
  • Independent Output Enables
  • CMOS/TTL-Compatible Outputs
  • Oscillator Outputs Capable of Sinking 16mA to Directly Drive LEDs
  • Relieves Microprocessor of Periodic Interrupt
  • Low-Power Consumption
  • Operating Temperature Range: -40°C to +125°C
  • ±100ppm/°C Temp Drift (MAX)


  • Consumer Appliances
  • Flashing LED Status Indicators
  • Printers
  • Servers
  • Switch-Mode Power Supplies

See parametric specs for Silicon Oscillators (17)

Part NumberfOUT
User Prog. fOUTSpread SpectrumVCC
Reset OutOper. Temp.
maxminSee Notes
DS1099 1.0480.00025NoNo2.7 to 5.5No-40 to +125
$0.70 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: DS1099.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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