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DS1094L Datasheet(PDF) 1 Page - Dallas Semiconductor

Part # DS1094L
Description  Multiphase Spread-Spectrum EconOscillator
Download  11 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1094L Datasheet(HTML) 1 Page - Dallas Semiconductor

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General Description
The DS1094L is a silicon oscillator that generates four
multiphase, spread-spectrum, square-wave outputs.
Frequencies between 2MHz and 31.25kHz can be out-
put in either two, three, or four-phase mode. The inter-
nal master oscillator can be dithered by either 0, 2, 4,
or 8% to reduce the amount of peak spectral energy at
the fundamental and harmonic clock frequencies. This
significantly reduces the amount of electromagnetic
interference (EMI) radiation that is generated at the sys-
tem level. The DS1094L is ideally suited as a clock gen-
erator for switched-mode power supplies. The outputs
generated by the DS1094L are used by DC-DC circuit-
ry to efficiently shift voltages either up or down. The
DS1094L can be programmed using the I2C™-compati-
ble, 2-wire serial interface to select the output frequen-
cy, number of clock phases, and dither rate, or
optionally it can be shipped from the factory custom
programmed.
Applications
Switch-Mode Power Supplies
Servers
Printers
Automotive Telematics and Infotainment
Features
♦ EconOscillator™ with Two, Three, or Four Phase
Outputs
♦ Ideally Suited as the Clock Generator for Switch-
Mode Power Supplies
♦ Output Frequencies Programmable from 2MHz to
31.25kHz
♦ Dithered Output Significantly Reduces EMI
Emissions
♦ No External Timing Components Required
♦ Nonvolatile (NV) Configuration Settings
♦ User-Programmable—Factory Programmed
Options Available
♦ Operating Temperature Range: -40°C to +85°C
Multiphase Spread-Spectrum EconOscillator
______________________________________________ Maxim Integrated Products
1
OUT4
OUT3
GND
1
2
8
7
SCL
SDA
OUT2
VCC
OUT1
µSOP
TOP VIEW
3
4
6
5
DS1094L
Pin Configuration
Ordering Information
VOUT
VIN
PHASE 1
PHASE 2
PHASE 3
DC-DC
STEP-DOWN
CONVERTER
OUT1
OUT2
OUT3
OUT4
GND
SCL
SDA
VCC
VCC
DS1094L
RPULLUP
THREE-PHASE
EXAMPLE WITH
DITHERED CLOCKS TO
REDUCE EMI
DC-DC
STEP-DOWN
CONVERTER
DC-DC
STEP-DOWN
CONVERTER
Typical Operating Circuit
Rev 1; 5/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-PACKAGE
DS1094LU
-40
°C to +85°C
8
µSOP
EconOscillator is a trademark of Dallas Semiconductor.
I2C is a trademark of Philips Corp. Purchase of I2C compo-
nents of Maxim Integrated Products, Inc., or one of its subli-
censed Associated Companies, conveys a license under the
Philips I2C Patent Rights to use these components in an I2C
system, provided that the system conforms to the I2C Standard
Specification as defined by Philips.


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