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PDF DS1080CL Data sheet ( Hoja de datos )
| Número de pieza | DS1080CL | |
| Descripción | Spread-Spectrum Crystal Multiplier | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-6068; Rev 1; 10/11
Spread-Spectrum Crystal Multiplier
General Description
The DS1080CL is a low-jitter, crystal-based clock gen-
erator with an integrated phase-locked loop (PLL) to
generate spread-spectrum clock outputs from 8MHz to
64MHz. The device is pin programmable to select the
clock multiplier rate as well as the dither magnitude.
The DS1080CL has a spread-spectrum disable mode
and a power-down mode to conserve power.
Automotive
Cable Modems
Cell Phones
Computer Peripherals
Applications
Copiers
Infotainment
PCs
Printers
Pin Configuration
TOP VIEW
+
X1 1
GND 2
CMSEL 3
DS1080CL
SMSEL 4
8 X2
7 VCC
6 SSO
5 PDN
Features
♦ Generates Spread-Spectrum Clocks from 8MHz to
64MHz
♦ Selectable Clock Multiplier Rates of 1x, 2x, and 4x
♦ Center Spread-Spectrum Dithering
♦ Selectable Spread-Spectrum Modulation
Magnitudes of ±0.5%, ±1.0%, and ±1.5%
♦ Spread-Spectrum Disable Mode
♦ Low Cycle-to-Cycle Jitter
♦ Power-Down Mode with High-Impedance Output
♦ Low-Power Consumption
♦ 3.0V to 3.6V Single-Supply Operation
♦ -40°C to +125°C Temperature Operation
♦ Small 8-Pin µSOP Package
Ordering Information
PART
TEMP RANGE
DS1080CLU+
-40°C to +125°C
DS1080CLU+T
-40°C to +125°C
DS1080CLU/V+
-40°C to +125°C
DS1080CLU/V+T -40°C to +125°C
+Denotes a lead-free package.
/V denotes an automotive qualified part.
T = Tape and reel.
PIN-PACKAGE
8 μSOP
8 μSOP
8 μSOP
8 μSOP
Typical Operating Circuit
CRYSTAL
CL1 CL2
X1
GND
CMSEL
SMSEL
1
2
3
4
DS1080CL
X2
8
7 VCC
SSO
6
PDN
5
VCC
DECOUPLING
CAPACITOR
fSSO
VCC
NOTE: IN THE ABOVE CONFIGURATION WITH PDN CONNECTED TO VCC, SMSEL CONNECTED TO GND, AND CMSEL OPEN, THE DEVICE IS IN NORMAL
OPERATION WITH 2x CLOCK MULTIPLICATION AND A SPREAD-SPECTRUM MAGNITUDE OF ±0.5%.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Spread-Spectrum Crystal Multiplier
Pin Description
PIN NAME
FUNCTION
1 X1 Crystal Drive/Clock Input. A crystal with the proper loading capacitors is connected across X1 and X2.
Instead of a crystal, a clock can be applied at the X1 input.
2 GND Signal Ground
Clock Multiplier Select. Trilevel digital input.
3
CMSEL
0 = 1x
Open = 2x
1 = 4x
Spread-Spectrum Magnitude Select. Trilevel digital input.
4
SMSEL
0 = ±0.5%
Open = ±1.0%
1 = ±1.5%
Power-Down/Spread-Spectrum Disable. Trilevel digital input.
5
PDN
0 = Power-Down/SSO High Impedance
Open = Power-Up/Spread Spectrum Disabled
1 = Power-Up/Spread Spectrum Enabled
6 SSO Spread-Spectrum Clock Multiplier Output. Outputs a 1x, 2x, or 4x spread-spectrum version of the crystal
or clock applied at the X1/X2 pins.
7 VCC Supply Voltage
8
X2
Crystal Drive Output. A crystal with the proper loading capacitors is connected across X1 and X2.
If a clock is connected to X1, then X2 should be left open circuit.
Block Diagram
8MHz
TO
16MHz
X1 fIN
CRYSTAL
X2 OSCILLATOR
CL1 CL2
1x/2x/4x CLOCK MULTIPLYING
PLL WITH SPREAD SPECTRUM
CMSEL
SMSEL
CONFIGURATION DECODE
AND CONTROL
DS1080CL
VCC
VCC
SSO
fSSO
PDN
GND
fSSO = 8MHz
TO
64MHz
NOTE: SEE INFORMATION ABOUT CL1 AND CL2 IN THE APPLICATIONS INFORMATION SECTION.
_______________________________________________________________________________________ 5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet DS1080CL.PDF ] | |
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