ASM3P2180_16 Datasheet, PDF (1/5 Pages) ON Semiconductor – Peak Reducing EMI Solution

ASM3P2180A
Peak Reducing
EMI Solution
Product Description
The ASM3P2180A is a versatile spread spectrum frequency
modulator designed specifically for a wide range of clock frequencies.
ASM3P2180A reduces electromagnetic interference (EMI) at the
clock source, allowing system wide reduction of EMI of down stream
clock and data dependent signals. ASM3P2180A allows significant
system cost savings by reducing the number of circuit board layers,
and shielding that are traditionally required to pass EMI regulations.
ASM3P2180A 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.
ASM3P2180A uses the most efficient and optimized modulation
profile approved by the FCC and is implemented by using
a proprietary all-digital method.
Features
• Generates a 1x EMI Optimized Clock Output
• Input Frequency:
♦ 6 MHz − 10 MHz
♦ 18 MHz − 30 MHz
• Output Frequency:
♦ 6 MHz − 10 MHz
♦ 18 MHz − 30 MHz
• Two Selectable Down Spread Options
• Selectable Frequency Range
• Integrated Loop Filter Components
• Operates with a 3.3 V Supply
• CMOS Design
• 8-Pin SOIC Packages
• This Device is Pb-Free, Halogen Free and is RoHS Compliant
Applications
The ASM3P2180A is targeted towards notebook LCD displays,
other displays using an LVDS interface, PC peripheral devices and
embedded systems.
www.onsemi.com
8
1
SOIC−8 NB
CASE 751
PIN CONNECTION
CLKIN/XIN 1
8 NC
XOUT 2
GND 3
ASM3P2180A
7 FS
6 VDD
SS% 4
5 CLKOUT
MARKING DIAGRAM
8
ACT
ALYWX
G
1
ACT
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb-Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information on page 4 of
this data sheet.
© Semiconductor Components Industries, LLC, 2016
1
July, 2016 − Rev. 4
Publication Order Number:
ASM3P2180/D