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參數(shù)資料
| 型號： | I2560BG-08TT |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 32 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 4.40 MM, GREEN, TSSOP-8 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 322K |
| 代理商： | I2560BG-08TT |
October 2006
P2560B
rev 1.3
Notice: The information in this document is subject to change without notice.
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008
Tel: 408-879-9077 Fax: 408-879-9018
www.pulsecoresemi.com
Low Frequency EMI Reduction
Features
FCC approved method of EMI attenuation
Generates a low EMI spread spectrum and a non
spread reference signal of the input clock
frequency
Optimized for input frequency range from
20 to 32MHz
Internal loop filter minimizes external components
and board space
Two selectable spread ranges
3.3V Operating Voltage
Ultra low power CMOS design: 5.50 mA @3.3V
Supports notebook VGA and other LCD timing
controller applications
Available in 8-pin SOIC and TSSOP
Product Description
The P2560B is a versatile spread spectrum frequency
modulator designed specifically for a wide range of clock
frequencies. It reduces electromagnetic interference (EMI) at
the clock source allowing system-wide reduction of EMI of
downstream clock and data dependent signals. It allows
significant system cost savings by reducing the number of
circuit board layers and shielding traditionally required to
pass EMI regulations.
The P2560B modulates the output of a single PLL in order to
spread the bandwidth of a synthesized clock, thereby
decreasing the peak amplitudes of its harmonics.
This results in significantly lower system EMI compared to
the typical narrow band signal produced by oscillators and
most clock generators. Lowering EMI by increasing a signal’s
bandwidth is called spread spectrum clock generation.
The P2560B uses the most efficient and optimized
modulation profile approved by the FCC and is implemented
by using a proprietary all-digital method.
Applications
The P2560B is targeted toward the notebook VGA chip and
other displays using an LVDS interface, PC peripheral
devices and embedded systems.
Block Diagram
VDD
VSS
ModOUT
XIN /CLKIN
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
PLL
Crystal
Oscillator
XOUT
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