DS1090U-16 ,250 kHz to 500 kHz, Low-frequency, spread-spectrum econ oscillatorELECTRICAL CHARACTERISTICS(V = +3.0V to +5.5V, T = -40°C to +85°C, unless otherwise noted.)CC APARA ..
DS1090U-8 ,500 kHz to 1 MHz, Low-frequency, spread-spectrum econ oscillatorApplicationsDS1090U-32* 32 8 µSOP250kHzAdd “/T” for Tape & Reel orders.*Contact factory for availab ..
DS1091LU-66+ ,Automotive Temperature Range Spread-Spectrum EconOscillator™Applications±1%, ±2%, or ±4%Automotive InfotainmentS Pin-Selectable Down-Dither Magnitude of 0%, -2 ..
DS1099 ,Low-Frequency Dual EconOscillatorApplications♦ ±100ppm/°C Temp Drift (MAX)Flashing LED Status IndicatorsConsumer AppliancesOrdering ..
DS1100 ,5-Tap Economy Timing Element (Delay Line)PIN DESCRIPTION TAP 1 to TAP 5 - TAP Output Number V - +5V CCGND - Ground IN - Input µMAX is a ..
DS1100-100 ,5-Tap Economy Timing Element Delay LinePIN DESCRIPTIONTAP 1 to TAP 5 - TAP Output NumberV - +5VCCGND - GroundIN - InputDESCRIPTIONThe DS11 ..
DTA113TKA , Digital transistor (built in resistor)
DTA113TKA , Digital transistor (built in resistor)
DTA113ZE , PNP -100mA -50V Digital Transistors (Bias Resistor Built-in Transistors)
DTA113ZUA , PNP -100mA -50V Digital Transistors (Bias Resistor Built-in Transistors)
DTA114 EK , DTA/DTC SERIES
DTA114ECA , Built-In Bias Resistors Enable The Configuration of An Inverter Circuit Without Connecting External Input Resistors
DS1090U-16-DS1090U-8
4 to 8 MHz, Low-frequency, spread-spectrum econ oscillator
General DescriptionThe DS1090 is a low-cost, dithered oscillator intended
to be used as an external clock for switched-mode
power supplies and other low-frequency applications.
The dithering or sweeping function reduces peak-radi-
ated emissions from the power supply at its fundamen-
tal frequency, as well as harmonic frequencies. The
device consists of a resistor-programmed master oscil-
lator, factory-programmed clock prescaler, and a pin-
programmed dither circuit. These features allow the
DS1090 to be used in applications where a spread-
spectrum clock is desired to reduce radiated emis-
sions. A combination of factory-set prescalers and
external resistor allows for output frequencies ranging
from 125kHz to 8MHz. Both dither frequency and dither
percentage are set using control pins.
ApplicationsSwitched-Mode Power Supplies
Servers
Printers
Embedded Microcontrollers
Industrial Controls
Automotive Applications
FeaturesLow-Cost, Spread-Spectrum EconOscillator™Simple User ProgrammingOutput Frequency Programmable from 125kHz
to 8MHzDither Percentage Programmable from 0% to 8%Dither Rate Programmable (fMOSC / 512, 1024,
2048, or 4096 )3.0V to 5.5V Single-Supply OperationCMOS/TTL-Compatible OutputOperating Temperature Range: -40°C to +85°C
DS1090
Low-Frequency, Spread-Spectrum
EconOscillator
Pin Configuration
Ordering Information
Typical Operating CircuitRev 0; 4/04
Add “/T” for Tape & Reel orders.
*Contact factory for availability.
EconOscillator is a trademark of Dallas Semiconductor.
DS1090
Low-Frequency, Spread-Spectrum
EconOscillator
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
DC ELECTRICAL CHARACTERISTICS(VCC= +3.0V to +5.5V, TA= -40°C to +85°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on VCCRelative to Ground...........-0.5V to +6.0V
Voltage Range on Input Pins
Relative to Ground.................................-0.5V to (VCC+ 0.5V),
not to exceed 6.0V
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-55°C to +125°C
Soldering Temperature.......................................See IPC/JEDEC
J-STD-020A Specification
DS1090
Low-Frequency, Spread-Spectrum
EconOscillator
AC ELECTRICAL CHARACTERISTICS
Note 1:All voltages referenced to ground.
Note 2:This is the change observed in output frequency due to changes in temperature or voltage.
Note 3:See the Typical Operating Characteristics section.
Note 4:Parameter is guaranteed by design and is not production tested.
Note 5:This is a percentage of the output period. Parameter is characterized but not production tested. This can be varied from
0% to 8%.
Note 6:This indicates the time between power-up and the outputs becoming active. An on-chip delay is intentionally introduced to
allow the oscillator to stabilize. tSTABis equivalent to ~500 clock cycles and is dependent upon the programmed
output frequency.
Note 7:Output voltage swings can be impaired at high frequencies combined with high output loading.
DS1090
Low-Frequency, Spread-Spectrum
EconOscillator
Typical Operating Characteristics(VCC= +3.3V, TA = +25°C, unless otherwise noted.)
DS1090
Low-Frequency, Spread-Spectrum
EconOscillator
Typical Operating Characteristics (continued)(VCC= +3.3V, TA = +25°C, unless otherwise noted.)
